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There is a page named "Porosity" on this wiki. See also the other search results found.

Page title matches

  • Porosity
    | chapter = Porosity ...most all hydrocarbon reservoirs are composed of sedimentary rocks in which porosity values generally vary from 10 to 40% in sandstones and from 5 to 25% in car
    24 KB (3,450 words) - 19:09, 20 January 2022
  • Predicting sandstone reservoir porosity
    ...porosity. This section presents different methods of predicting sandstone porosity. Choose the method(s) most appropriate to your situation. ==Porosity-depth plots==
    10 KB (1,384 words) - 15:00, 6 April 2022
  • Density-neutron log porosity
    ...] data, especially in formations of complex lithology. Better estimates of porosity are possible with the combination than using either tool or sonic separatel ...y to porosity using charts in a log interpretation chartbook, or calculate porosity from bulk density using this equation:
    12 KB (1,763 words) - 16:18, 5 April 2022
  • Determining porosity from density–neutron logs
    #REDIRECT [[Density-neutron log porosity]]
    42 bytes (4 words) - 19:46, 14 January 2015
  • Predicting carbonate porosity and permeability
    * [[Basics of carbonate porosity formation and preservation]]
    2 KB (251 words) - 18:32, 6 April 2022
  • Carbonate porosity formation and preservation
    ...lities than an initially poor-quality rock becoming a good-quality rock. [[Porosity]] can be created late in a rock's life; however, concentrating on the early ...o. 2, p. 207–250. Classic reference for basic concepts regarding carbonate porosity.</ref> Surface and shallow diagenesis mainly occurs in fabric-selective por
    5 KB (708 words) - 17:27, 5 December 2023
  • Predicting sandstone porosity and permeability
    #REDIRECT [[Sandstone porosity and permeability prediction]]
    60 bytes (6 words) - 20:15, 19 May 2014
  • Determining porosity from density-neutron logs
    #REDIRECT [[Density-neutron log porosity]]
    42 bytes (4 words) - 16:56, 19 December 2014
  • Sandstone porosity and permeability prediction
    ...t on porosity and permeability, this subsection concentrates on predicting porosity and permeability by considering the effects of diagenesis. * [[Predicting sandstone reservoir porosity]]
    2 KB (300 words) - 20:29, 5 April 2022
  • Midale porosity, pore geometries, and petrophysics
    Most of the [[porosity]] in the vuggy [[packstone]] facies is molds and [http://www.merriam-webste ...ance_fig9-102.png|300px|thumb|{{figure number|1}}Crossplot of routine core porosity and permeability from the Midale in an example well at Weyburn field. Copyr
    5 KB (659 words) - 16:54, 12 April 2022
  • Basics of carbonate porosity formation and preservation
    #REDIRECT [[Carbonate porosity formation and preservation]]
    59 bytes (6 words) - 14:52, 19 December 2014
  • Core-log transformations and porosity-permeability relationships
    #REDIRECT [[Core-to-log transformations and porosity-permeability relationships]]
    81 bytes (6 words) - 15:37, 19 December 2014
  • Core-to-log transformations and porosity-permeability relationships
    | chapter = Core-log transformations and porosity-permeability relationships ...lity-relationships_fig1.png|{{figure number|1}}Plot showing unshifted core porosity in spiked format, together with bulk density log.
    14 KB (1,893 words) - 20:15, 2 February 2016
  • Relationship between porosity and permeability on fractured basement reservoir
    ...y, rock is fractured can be categorized into 3 type geologically, based on porosity system : ...ation. However, the reservoir problem does not include both of the another porosity system types. Porous of matrix from a formation that has fracture matrix, u
    29 KB (4,601 words) - 16:09, 12 April 2016

Page text matches

  • Determining porosity from density–neutron logs
    #REDIRECT [[Density-neutron log porosity]]
    42 bytes (4 words) - 19:46, 14 January 2015
  • Determining porosity from density-neutron logs
    #REDIRECT [[Density-neutron log porosity]]
    42 bytes (4 words) - 16:56, 19 December 2014
  • Basics of carbonate porosity formation and preservation
    #REDIRECT [[Carbonate porosity formation and preservation]]
    59 bytes (6 words) - 14:52, 19 December 2014
  • Predicting sandstone porosity and permeability
    #REDIRECT [[Sandstone porosity and permeability prediction]]
    60 bytes (6 words) - 20:15, 19 May 2014
  • Core-log transformations and porosity-permeability relationships
    #REDIRECT [[Core-to-log transformations and porosity-permeability relationships]]
    81 bytes (6 words) - 15:37, 19 December 2014
  • Sandstone porosity and permeability prediction
    ...t on porosity and permeability, this subsection concentrates on predicting porosity and permeability by considering the effects of diagenesis. * [[Predicting sandstone reservoir porosity]]
    2 KB (300 words) - 20:29, 5 April 2022
  • Carbonate diagenetic stages
    ==Stages affect porosity== ...o. 2, p. 207–250. Classic reference for basic concepts regarding carbonate porosity.</ref>
    6 KB (727 words) - 19:06, 6 April 2022
  • Postaccumulation cementation
    ...a/bulletns/1990-91/data/pg/0075/0007/0000/1145.htm Empirical prediction of porosity and permeability in sandstones]: AAPG Bulletin, vol. 75, p. 1145–1160.</r ...l point]] as the pore volume within the structural closure decreases. If [[porosity]] is lowered sufficiently, the [[accumulation]] may be subeconomic in size.
    3 KB (430 words) - 15:35, 1 February 2022
  • Sandstone diagenesis: composition and texture
    .... The ratio of quartz to [[Ductility|ductile]] grains is key to compaction porosity loss. ==Influence of grain size on porosity and diagenesis==
    5 KB (729 words) - 20:48, 5 April 2022
  • Pore system shapes
    ...y'''. In most cases, water saturation (S<sub>w</sub>) of rocks with Archie porosity can be predicted from log analysis using the [[Archie equation]] * Φ = [[porosity]]
    4 KB (528 words) - 13:53, 4 April 2022
  • Reservoir system quality prediction
    ...ermining reservoir system performance.The interrelationship of reservoir [[porosity]], [[permeability]], thickness, and lateral distribution determines reservo ...o. 2, p. 207–250. Classic reference for basic concepts regarding carbonate porosity.</ref> compares variables affecting reservoir system quality for sandstones
    3 KB (425 words) - 17:11, 5 April 2022
  • Fieldwork risk assessment
    ...itical element. For reservoir rock, the main risk might be thickness and [[porosity]] preservation. For source rock, the main risk might be organic richness an * Reservoir porosity
    2 KB (354 words) - 22:07, 1 February 2022
  • Carbonate porosity formation and preservation
    ...lities than an initially poor-quality rock becoming a good-quality rock. [[Porosity]] can be created late in a rock's life; however, concentrating on the early ...o. 2, p. 207–250. Classic reference for basic concepts regarding carbonate porosity.</ref> Surface and shallow diagenesis mainly occurs in fabric-selective por
    5 KB (708 words) - 17:27, 5 December 2023
  • Archie equation
    * Φ = [[porosity]] ...lution), have clay in their matrix, or have moldic, vuggy, or [[fracture]] porosity require adjustments. The table below lists the five variables and methods f
    5 KB (703 words) - 13:52, 5 April 2022
  • Sandstone diagenetic processes
    ...ore type and geometry of a sandstone and therefore controls its ultimate [[porosity]] and [[permeability]]. Early diagenetic patterns correlate with environmen ...ation destroys pore space; grain leaching creates it. Compaction decreases porosity through grain rearrangement, plastic [[deformation]], pressure solution, an
    7 KB (870 words) - 20:30, 5 April 2022
  • Pickett plot construction
    # Plot points of matching [[porosity]] and true resistivity (R<sub>t</sub> ) on log-log paper. ...ormance_fig9-36.png|thumb|300px|{{figure number|1}}Plot points of matching porosity and true resistivity (R<sub>t</sub>) values obtained from well logs on 2×4
    6 KB (878 words) - 16:16, 5 April 2022
  • Predicting sandstone reservoir porosity
    ...porosity. This section presents different methods of predicting sandstone porosity. Choose the method(s) most appropriate to your situation. ==Porosity-depth plots==
    10 KB (1,384 words) - 15:00, 6 April 2022
  • Diagenesis
    ...fter deposition.It can have important effects in decreasing or enhancing [[porosity]] and [[permeability]].
    691 bytes (74 words) - 16:13, 22 October 2014
  • Midale porosity, pore geometries, and petrophysics
    Most of the [[porosity]] in the vuggy [[packstone]] facies is molds and [http://www.merriam-webste ...ance_fig9-102.png|300px|thumb|{{figure number|1}}Crossplot of routine core porosity and permeability from the Midale in an example well at Weyburn field. Copyr
    5 KB (659 words) - 16:54, 12 April 2022
  • Sequences during moderate-amplitude, high-frequency cycles
    * Primary [[porosity]] greatest in grainy upper parts of sequences and thicker [[length::(10 m]] * [[Porosity]] in the sequence tops plugged by [http://www.merriam-webster.com/dictionar
    5 KB (674 words) - 21:22, 6 April 2022
  • Diagenetic trap regime
    ...4 | Diagenetic traps || rowspan = 2 | Diagenetic reservoirs; Form where [[porosity]] is created as a result of local [[Diagenesis|diagenetic processes]] such ...sult of localized leaching of nonreservoir-quality rock to create enhanced porosity and [[permeability]]. Common beneath [[unconformity]] surfaces.
    5 KB (645 words) - 16:14, 13 April 2022
  • Coal bed methane (UDip)
    ...free gas or can be saturated with water. The system is then called a “dual-porosity reservoir”, one characterized by a complex interaction of the coal matrix ==The porosity and permeability of coal==
    10 KB (1,576 words) - 14:42, 2 April 2019
  • Sequences during high-amplitude, high-frequency cycles
    * [[Porosity]] plugged by caliche at sequence caps .../www.oxforddictionaries.com/us/definition/american_english/cap-rock cap] [[porosity]] is intergranular in shoals and in nondolomitized build-ups
    6 KB (761 words) - 13:47, 7 April 2022
  • Morrow lithofacies and pore types: Sorrento field
    ...we see a picture of a clastic reservoir with wide heterogeneity in total [[Porosity|porosities], [[Pore and pore throat sizes|pore-throat sizes]], and [[capill ...solution?) porosity also may be present but is minor. (For definitions of porosity types, see [[Reservoir quality]].)
    6 KB (769 words) - 17:23, 11 April 2022
  • Density-neutron log porosity
    ...] data, especially in formations of complex lithology. Better estimates of porosity are possible with the combination than using either tool or sonic separatel ...y to porosity using charts in a log interpretation chartbook, or calculate porosity from bulk density using this equation:
    12 KB (1,763 words) - 16:18, 5 April 2022
  • Meteoric diagenesis
    ...le, A color guide to the petrography of carbonate rocks: Grains, textures, porosity, diagenesis: [http://store.aapg.org/detail.aspx?id=649 AAPG Memoir 77] p. 3
    648 bytes (87 words) - 15:34, 10 December 2015
  • Bioturbation
    ...or reworking of sediment by living organisms. It may enhance or decrease porosity and permeability. For instance, burrows filled with sand grains in a mud or
    907 bytes (132 words) - 21:42, 18 September 2014
  • Sequences during low-amplitude, high-frequency cycles
    **Dolomitized intertidal laminites (intercrystalline [[porosity]]) **Siliciclastic supratidal caps (intergranular porosity)
    5 KB (708 words) - 21:00, 6 April 2022
  • Pressure compartments
    * [[Porosity]] loss due to compaction is less in overpressured and more in underpressure ...educes the supply of free ions associated with cementation and secondary [[porosity]] formation.
    6 KB (828 words) - 17:57, 17 February 2022
  • Types of diagenetic traps
    * Primary [[porosity]] preserved due to selective [[Reservoir quality#Cementation|cementation]] * [[Secondary porosity]] created by cement and/or matrix dissolution
    2 KB (294 words) - 21:01, 4 February 2022
  • Sandstone
    ...orosity and increase the bed thinning. Deep burial cause decrease the sand porosity dramatically. [[File:Sandstone_Fig-3.png|thumb|300px|Fig. 3. Porosity and Compaction (Derived form Nichols)<ref name=Nichols />]]
    10 KB (1,508 words) - 15:44, 22 March 2019
  • Sandstone permeability prediction from texture
    ...-60.png|300px|thumb|{{figure number|1}}Grain size affects permeability and porosity.<ref name=ch09r11>Coalson, E. B., Hartmann, D. J., and Thomas, J. B., 1990, ...nce_fig9-60.png|Figure 1]] shows how grain size affects permeability and [[porosity]].
    9 KB (1,118 words) - 17:03, 6 April 2022
  • Cased hole tools
    ...ty and water salinity are known. The porosity devices are used to estimate porosity when lithology is known. Table 1 lists the types of devices used for these | rowspan = 2 | [[Porosity]] || [[Basic open hole tools#Compensated neutron|Compensated neutron]]
    10 KB (1,427 words) - 16:26, 18 January 2022
  • Core-to-log transformations and porosity-permeability relationships
    | chapter = Core-log transformations and porosity-permeability relationships ...lity-relationships_fig1.png|{{figure number|1}}Plot showing unshifted core porosity in spiked format, together with bulk density log.
    14 KB (1,893 words) - 20:15, 2 February 2016
  • Log interpretation: initial quick scan
    Determining the [[porosity]] and [[True resistivity determination|true resistivity]] of a zone is the ...ich to measure changes. In this case, the [[Basic_open_hole_tools#Porosity|porosity log]] is the primary reconnaissance measurement. By first finding the porou
    4 KB (543 words) - 14:11, 21 August 2014
  • Decompaction
    ...ts be corrected to their original thickness before burial using a specific porosity-depth function for each [[lithologic]] unit. This involves sequential [[bac
    1,008 bytes (139 words) - 19:54, 25 June 2015
  • Geostatic and lithostatic pressure
    * [[Porosity|Porosities]] of different lithologies * φ = weighted average of rock [[porosity]]
    3 KB (402 words) - 14:47, 16 February 2022
  • Fracture traps
    ...ture traps may not. Some might argue that [[fracture]]s are just another [[porosity]] type and should be thought of as part of the [[reservoir]], not as a trap ...rvoir'''—Reservoir in which most of the [[permeability]] and some of the [[porosity]] is provided by open fractures.
    3 KB (461 words) - 16:04, 13 April 2022
  • Intact membrane seal leakage
    ...pressure) is less than the capillary displacement pressure of the matrix [[porosity]] of the seal. Under these conditions, the relative [[permeability]] of the ...occurs, oil can leak through the [[fracture]]s without invading the matrix porosity.
    3 KB (475 words) - 17:08, 1 February 2022
  • Diagenesis: information from petrology
    | Primary [[porosity]] preservation || Indicates facies patterns may control hydrocarbon distrib ...rap location; mineralogy and/or facies may control location of dissolution porosity || Use [[sequence stratigraphy]], hydrologic, or thermal maturity models.<r
    4 KB (544 words) - 21:38, 4 February 2022
  • Subsurface diagenesis and its relation with diagenetic trap on carbonate rocks reservoir
    ==Relation between subsurface diagenesis with porosity changing== ===Increase of porosity===
    16 KB (2,395 words) - 21:18, 9 January 2024
  • Formation evaluation of naturally fractured reservoirs
    ...because other features such as a rough borehole, shales, and changes in [[porosity]], lithology, and tool centralization might produce amplitude drops that ha When the tool is run through an unfractured section of reasonably constant porosity, lithology, borehole rugosity, and tool centralization , the shades of dark
    9 KB (1,380 words) - 17:25, 18 January 2022
  • Rate of penetration
    ===Relative porosity=== ...tively slow ROP in rocks having low matrix porosity to rocks having higher porosity and faster ROP. This comparison requires that the prevailing drilling condi
    7 KB (1,049 words) - 19:02, 20 January 2022
  • Pressure prediction: analysis of well-log and seismic data
    ...variable within shale sections. Because porosity is related to compaction, porosity measurements from well logs can be calibrated to fluid pressure in the pore ...major remaining variable that affects [[rate of penetration]] in shale is porosity.
    5 KB (733 words) - 17:57, 17 February 2022
  • Overview of routine core analysis
    ...PA</ref> require laboratory analysis of large diameter cores to evaluate [[porosity]], hydrocarbon saturation, and net pay. (For more on continuous coring, see ...res. These samples can provide useful details of the lithology, petrology, porosity, [[permeability]], and hydrocarbon content of the formation.<ref name=pt05r
    14 KB (2,121 words) - 21:16, 19 January 2022
  • Logging while drilling
    ...rements of the formation (electric logs such as gamma ray, resistivity, or porosity), drilling parameters (e.g., downhole torque, weight on bit, temperature, o
    2 KB (206 words) - 21:17, 3 December 2015
  • Gravity in petroleum exploration
    ...undings. The borehole gravity meter has broad application, from locating [[porosity]] in wildcats or through [[casing]] in old wells to monitoring fluid change
    1 KB (187 words) - 17:53, 25 January 2022
  • What is permeability?
    ...[porosity]] of 30%, and flow unit 2 has a porosity of 10%. The variance in porosity becomes the indicator of the contrast in pore throat size when converted to
    5 KB (694 words) - 20:41, 4 April 2022
  • Vibro-sesismic to increasing the production rate of coal bed methane
    ===Porosity and permeability=== ...pearmebility is the capacity of pore material to let fluida flow.When the porosity increase, the pearmeability will also increase, and the production result w
    11 KB (1,551 words) - 16:49, 11 January 2016
  • Fractured membrane seal leakage
    ...petroleum column]] exceeds the [[displacement pressure]] of the fracture [[porosity]] in the seal. ...cks, so it is easier for petroleum to invade the fractures than the matrix porosity. In fact, many fractured rocks with open fractures have apertures so wide t
    3 KB (478 words) - 17:09, 1 February 2022
  • Buckles plot
    A Buckles plot is a plot of water saturation (S<sub>w</sub>) vs. [[porosity]]. Contours of equal bulk volume water (BVW) are drawn on the plot.
    1 KB (183 words) - 18:19, 26 March 2015
  • Carbonate facies
    * [[Predicting carbonate porosity and permeability]] * [[Basics of carbonate porosity formation and preservation]]
    3 KB (433 words) - 18:32, 6 April 2022
  • Reservoir system
    ...between different disciplines. Explorationists apply the term to mean a [[Porosity|porous]] and [[Permeability|permeable]] rock regardless of the fluid it con * A '''reservoir''' is a [[Porosity|porous]] and [[Permeability|permeable]] rock saturated with oil or gas in [
    4 KB (579 words) - 14:34, 1 April 2022
  • China Shale Gas & Liquids - Sichuan Basin
    ...40m, an average TOC content of 2-4%, vitrinite reflectance (Ro) of 2-3.5%, porosity of 1.85-8.32%, and pressure coefficient of 1.3-2.1 (Zou et al., 2019; Guo e ...(Guo et al., 2020). In summary, for the high quality shale interval, high porosity provides abundant pore space for shale gas storage, and high brittleness ma
    7 KB (985 words) - 18:54, 4 December 2023
  • Seismic data: analyzing individual reflectors
    * [[Porosity]] prediction ...within specific reflectors can give us clues to changes in lithology or [[porosity]].
    4 KB (481 words) - 18:20, 4 February 2022
  • Forward modeling of seismic data
    ...lower interval velocity and lower density than the surrounding rock (see [[Porosity]]). ...ts from this modeling indicate that seismic data could be used to identify porosity in this geological setting. A good description of modeling methods and a nu
    10 KB (1,513 words) - 21:16, 19 January 2022
  • Pore and pore throat sizes
    ...ide it. The cross-sectional shape of fluids moving through intergranular [[porosity]] is roughly circular. Both pores and pore throats can be divided into petr ...etrography and reservoir physics, 1: objective classification of reservoir porosity]: AAPG Bulletin, vol. 75, no. 10, p. 1547–1563.</ref> describe a procedur
    4 KB (516 words) - 14:04, 4 April 2022
  • Sea level cycles and climate
    ...resmi1/data/a067/a067/0001/0150/0155.htm Eustatic and tectonic controls on porosity evolution beneath sequence-bounding unconformities and parasequence disconf ...s greater, carbonates are subject to greater dissolution; therefore, vuggy porosity and [http://wiki.seg.org/wiki/Dictionary:Karst karst] features are common.
    7 KB (894 words) - 20:54, 6 April 2022
  • Reservoir
    ...at can accumulate hydrocarbons (oil or gas). Reservoir rock must have good porosity and permeability to accumulate and drain oil in economical quantities. ==Reservoir Porosity==
    14 KB (2,134 words) - 16:48, 26 March 2019
  • Porosity
    | chapter = Porosity ...most all hydrocarbon reservoirs are composed of sedimentary rocks in which porosity values generally vary from 10 to 40% in sandstones and from 5 to 25% in car
    24 KB (3,450 words) - 19:09, 20 January 2022
  • Sea level cycles and carbonate diagenesis
    ...s that occurs during the longer term third-order cycles. For example, if [[porosity]] is occluded early, then later diagenesis does not occur or is greatly red ...resmi1/data/a067/a067/0001/0150/0155.htm Eustatic and tectonic controls on porosity evolution beneath sequence-bounding unconformities and parasequence disconf
    7 KB (960 words) - 21:00, 6 April 2022
  • Core description
    ...and wireline log calibration. Core plugs provide samples for analysis of [[porosity]], [[permeability]], fluid saturation, and a host of compositional and text ...sedimentary structures are depicted graphically as accurately as possible. Porosity amounts in percent can be scaled as needed. (Modified from Casey.<ref name=
    13 KB (1,786 words) - 20:50, 19 January 2022
  • Standard interpretation
    ...e response of the various logging devices. To interpret the response for [[porosity]] or saturation, the volume of shale must be determined. * Determine the porosity. [[Porosity]] is the fraction of the total rock available for the storage of fluids.
    25 KB (3,776 words) - 19:53, 18 January 2022
  • Petrophysical analysis of Sorrento field wells
    ...y-and-performance_fig9-90.png|Figure 1]]. Sandstone descriptors found on [[porosity]] logs are as follows: Wells 8 and 1 both are interpreted as encountering transition zones, based on porosity types and log-calculated saturations. Well 8 encountered the Morrow just ab
    7 KB (956 words) - 17:24, 11 April 2022
  • Midale water saturation and pore geometry
    ...burn well. The hyperbolic curves represent equal values of S<sub>w</sub> × porosity (Φ). Points from the same pore type that fall along a hyperbolic curve are * [[Midale porosity, pore geometries, and petrophysics]]
    4 KB (588 words) - 17:01, 12 April 2022
  • Displacement pressure estimation from pore size
    ....com/data/bulletns/1992-93/data/pg/0076/0002/0000/0191.htm Relationship of porosity and permeability to various parameters derived from mercury injection-capil ...g Research conference, unpublished abstract.</ref> Use of permeability and porosity is thwarted by the lack of a distinct apex in the mercury injection data of
    5 KB (766 words) - 22:55, 2 February 2016
  • Rock physics analysis for reservoir identification
    ...velocities, and moduli as a function of composition, diagenetic processes, porosity, and fluid content. Such analysis is commonly carried out to discriminate b ...Gurevich, B., 2007, Fluid substitution in shaley sediment using effective porosity: Geophysics, v. 72, no. 3, p. O1-O8.</ref> The result of fluid substitution
    15 KB (2,356 words) - 18:00, 26 April 2022
  • Rock quality
    ....com/data/bulletns/1992-93/data/pg/0076/0002/0000/0191.htm Relationship of porosity to permeability to various parameters derived from mercury injection–capi ...t think that flow unit 1 is higher quality because it has three times more porosity and the same permeability as flow unit 2. However, in terms of fluid flow e
    10 KB (1,534 words) - 16:53, 4 April 2022
  • Water saturation distribution in a reservoir
    Bulk volume water (BVW) equals [[porosity]] (Φ) × S<sub>w</sub>. In zones with the same pore type and geometry, BVW A [[Buckles plot]] is a plot of S<sub>w</sub> vs. porosity. Contours of equal BVW are drawn on the plot.
    5 KB (687 words) - 17:09, 5 April 2022
  • Midale lithofacies and distribution
    ...-and-performance_fig9-102.png|{{figure number|4}}Crossplot of routine core porosity and permeability from Midale in an example well at Weyburn field. From Coal ...The brick pattern denotes packstone facies with vuggy and intergranular [[porosity]]; hachures indicate porous dolomitic mudstone facies. Log and core data fo
    6 KB (842 words) - 18:50, 4 December 2023
  • Petrophysical analysis of lithofacies
    ...lar petrophysical character (flow units) using log data and, if available, porosity-[[permeability]] data. Categorize each flow unit by port type as mega-, mac ...ons of the parasequences have poor reservoir characteristics, despite high porosity readings on the logs. Thus, the target of interest is the highstand mound f
    6 KB (763 words) - 18:53, 4 February 2022
  • Tight gas reservoirs: evaluation
    ...-gas-reservoirs_fig3.png|{{figure number|3}}Histograms showing (a) average porosity values and (b) average permeability values for cored tight gas reservoir fa ...aracteristic of this type of reservoir is the nature and distribution of [[porosity]] and permeability (Table 1). The most common reason for the minimal permea
    11 KB (1,444 words) - 21:26, 4 January 2024
  • Predicting carbonate porosity and permeability
    * [[Basics of carbonate porosity formation and preservation]]
    2 KB (251 words) - 18:32, 6 April 2022
  • Migration rate calculation
    ! Porosity || Use * φ = free [[porosity]]
    4 KB (618 words) - 19:40, 14 February 2022
  • Sandstone permeability estimation from cuttings
    # Describe the visible and pinpoint [[porosity]] and interconnectedness. * [[Sandstone porosity and permeability prediction]]
    6 KB (882 words) - 17:19, 6 April 2022
  • Determining water saturation
    * [[Determining porosity from density-neutron logs]]
    2 KB (244 words) - 13:38, 5 April 2022
  • Early carbonate diagenesis
    ...=Purser_1978>Purser, B. H., 1978, Early diagenesis and the preservation of porosity in Jurassic limestones: Journal of Petroleum Geology, v. 1, no. 2, p. 83-94 ...s. In the undersaturated zone, solution occurs, creating moldic or vuggy [[porosity]]. In the active saturated freshwater phreatic zone extensive and rapid cem
    10 KB (1,352 words) - 19:07, 6 April 2022
  • Diagenetic traps: criteria for recognition
    * Secondary [[porosity]] present but not related to subaerial exposure (subsurface deep burial dis * Zones of secondary porosity interbedded with tight rock in a depositionally homogeneous facies
    5 KB (611 words) - 21:06, 4 February 2022
  • Thin section analysis
    ...tional cores because petrographic observations can be compared directly to porosity and permeability measurements. ...ll pores. The epoxy is stained, usually blue, to facilitate observation of porosity once thin sections have been completed. Epoxy can also be “stained” wit
    24 KB (3,264 words) - 15:09, 24 January 2022
  • Reservoir quality
    ...y types in sandstone and carbonate rocks are listed in Table 1 (also see [[Porosity]]). |+ {{table number|1}}Porosity types
    18 KB (2,514 words) - 17:47, 21 January 2022
  • Carbonate diagenesis
    ...rporated into geological facies and/or diagenetic models in order to map [[porosity]], [[Interpreting Sw distribution in a reservoir| water saturation]], and [ ...agenetic processes that are initiated soon after deposition and by which [[Porosity#Carbonate pore systems|intergranular pore space]] is progressively reduced
    23 KB (3,026 words) - 20:48, 19 January 2022
  • Predicting hydrocarbon recovery
    ...pore volume and [[water saturation]] (S<sub>w</sub>). Reservoir size and [[porosity]] determine pore volume. Pore throat size (see [[Pore and pore throat sizes * Φ = porosity (decimal, not percent)
    5 KB (691 words) - 17:10, 5 April 2022
  • Well log analysis for reservoir characterization
    # porosity (φ) ...shale volume calculation, calculate clay volume, permeability calculation, porosity calculation, wave velocity calculation, etc.
    25 KB (3,679 words) - 21:17, 13 March 2019
  • Hydrocarbon accumulation: the seven critical elements
    * [[Porosity]] * Lateral [[permeability]] and [[porosity]]
    5 KB (636 words) - 21:47, 1 February 2022
  • Micropermeable seal leakage
    ...[[fracture]]s are few or where fracture apertures are very small, fracture porosity may be invaded, but the leakage rate may be small.
    5 KB (742 words) - 17:11, 1 February 2022
  • Reservoir engineering
    Porosity (Phi) 5, permeability (k) mD, fluid saturation (S) %, capiler pressure (Pc) ===Porosity===
    14 KB (2,122 words) - 17:33, 7 March 2016
  • Borehole gravity
    ...log. The sharp difference In density between 6330 and 6370 ft is caused by porosity not detected by the gamma-gamma [[density log]]. The broader difference ano ...yond this simple description to include detection of oil- and gas-filled [[porosity]] and detection and definition of remote structures, such as salt domes, fa
    10 KB (1,517 words) - 15:54, 20 January 2022
  • Lithofacies analysis
    ...ck-look lithology from logs|well logs]] and outcrops. Annotate logs with [[porosity]] and [[permeability]] data (if available) from potential reservoir and sea
    2 KB (317 words) - 18:52, 4 February 2022
  • Monte Carlo and stochastic simulation methods
    For example, the input variables might be porosity (&phi;), oil saturation (S<sub>0</sub>), and a binary indicator (I) set equ ...iables. For example, the joint spatial distribution of the three variables porosity, oil saturation, and indicator of formation presence can be modeled by thre
    11 KB (1,623 words) - 19:24, 19 January 2022
  • Haynesville and Bossier Shales (Upper Jurassic), East Texas and Northwest Louisiana
    ...ch Bossier reservoirs are characterized by overpressure (0.9 psi/ft), high porosity averaging 8–12%, low Sw of 20–30%, nano-darcy permeabilities, reservoir ...higher percent weight of total organic content (TOC), higher average total porosity and higher original gas in place (OGIP; Fig. 4); however, increasing permit
    4 KB (628 words) - 23:05, 3 March 2022
  • Relationship between porosity and permeability on fractured basement reservoir
    ...y, rock is fractured can be categorized into 3 type geologically, based on porosity system : ...ation. However, the reservoir problem does not include both of the another porosity system types. Porous of matrix from a formation that has fracture matrix, u
    29 KB (4,601 words) - 16:09, 12 April 2016
  • Open hole tools
    * '''Storage capacity''' of the formation, which normally includes [[porosity]] and fluid saturations ...'lithology and porosity'' devices are used to determine both lithology and porosity. A variety of ''auxiliary'' tools are used to make special logging measurem
    23 KB (3,350 words) - 17:26, 18 January 2022
  • Fracture analysis
    * Natural fracture intensity prediction and, to a limited extent, fracture [[porosity]], given assumptions regarding rock behavior and [[Wikipedia:Deformation_(m * Prediction of fracture porosity, given assumptions regarding relationships between stress and strain and th
    5 KB (644 words) - 15:30, 3 February 2022
  • Saturations required for hydrocarbon flow
    Other experiments, including lower [[porosity]] rocks, indicate much higher oil saturations of 25–91% may be required.<
    2 KB (313 words) - 13:57, 1 April 2022
  • Sorrento field: water saturation
    ...name=ch09r42>Patchett, J., G., Coalson, E., B., 1982, The determination of porosity in sandstone and shaly sandstone, part 2: effects of complex mineralogy and ...by brine during testing. Saturation exponents were less than 2 in the best porosity type. This implies the reservoir is somewhat shaly. However, ''n'' was assu
    7 KB (1,044 words) - 16:57, 13 April 2022
  • Mudlogging: the mudlog
    This track gives a relative indication of rock strength and [[porosity]]. Track 1 includes the following information: ...-mudlog_fig2.png|Figure 2]], a separate column is included for qualitative porosity estimation.
    5 KB (752 words) - 15:39, 24 January 2022
  • Capillary pressure (Pc) curves: pore throat size determination
    ...to equilibrium, the volume of injected mercury is measured (V2). Since the porosity of the test sample is known prior to the test, the volume of injected mercu
    6 KB (898 words) - 16:21, 4 April 2022
  • Pay determination
    * [[Basic open hole tools|Well logs]], including measures of the lithology, [[porosity]], and fluid saturation ...sis (porosity, [[permeability]], fluid saturation), wireline log analysis (porosity, fluid saturation)
    13 KB (1,799 words) - 19:01, 20 January 2022
  • Weyburn seal capacity
    ...pear to be a seal at all. Instead, it consists of rocks with appreciable [[porosity]], local oil staining, local log-calculated water saturations less than 100 ....com/data/bulletns/1992-93/data/pg/0076/0002/0000/0191.htm Relationship of porosity to permeability to various parameters derived from mercury injection–capi
    10 KB (1,484 words) - 20:55, 4 December 2023
  • Borehole gravity: uses, advantages, and disadvantages
    * Evaluating reservoir [[porosity]], especially in carbonate reservoirs where other tools are not as reliable
    3 KB (351 words) - 15:11, 31 January 2022
  • Fault seal analysis for reservoir development
    ...in the fault section. Fault segment that becomes insulating if it has high porosity and permeability values will channel hydrocarbon fluid to the surface. So t ...ntation that occurs in the partial fault plane / can also completely cover porosity so that the field becomes permeable.
    14 KB (2,146 words) - 19:35, 13 September 2022
  • Overpressure causes
    ...ock mass is buried, it tends to compact. Under normal conditions, as the [[porosity]] is reduced, the [[interstitial fluid]] is expelled. When the fluid cannot
    3 KB (394 words) - 16:23, 16 February 2022
  • Hydrology and sandstone diagenesis
    * [[Sandstone porosity and permeability prediction]] * [[Predicting sandstone reservoir porosity]]
    6 KB (787 words) - 13:43, 6 April 2022
  • Electrical methods
    ..., cracks, and faulted zones may become the primary conducting paths (see [[Porosity]]). ...' average resistivity are the total porosity, including fault and fracture porosity, and the resistivity of the fluids present within the rock. The average res
    15 KB (2,130 words) - 21:19, 19 January 2022
  • Preprocessing of logging data
    ...ef name=pt04r8>Patchett, J. G., Coalson, E. B., 1979, The determination of porosity in sandstones and shaly sandstones, Part 1— quality control: SPWLA 20th A ...in establishing depth correlations between core and logs. Boyle's law core porosity and core grain density can be used to construct a core bulk density curve t
    13 KB (2,094 words) - 17:42, 18 January 2022
  • Surficial geochemical case history 2: stratigraphic trap
    ...ing basics|processing]], a revised interpretation (right) also predicted [[porosity]] development there and coincident with the surface geochemical anomaly. A
    3 KB (361 words) - 17:45, 12 April 2022
  • Quick-look lithology from logs
    * [[Basic open hole tools#Compensated neutron|Neutron]] [[porosity]] ...us rocks, density must be interpreted in combination with neutron or other porosity logs.
    25 KB (3,637 words) - 19:39, 18 January 2022
  • Predicting carbonate reservoir location and quality
    * [[Predicting carbonate porosity and permeability]] * [[Basics of carbonate porosity formation and preservation]]
    7 KB (894 words) - 14:15, 11 April 2022
  • Reservoir simulation study
    The reservoir characterization required to define [[porosity]] and [[permeability]] for each grid block in a reservoir simulation model ...s for each grid block, average curves can be derived for several ranges of porosity and permeability values (also referred to as ''regions'').
    19 KB (2,711 words) - 17:48, 21 January 2022
  • Pore system fundamentals
    [[Porosity]] consists of relatively large voids, or pores, distributed among smaller p
    3 KB (388 words) - 13:52, 4 April 2022
  • Subsurface maps
    * ϕ = [[porosity]] (fraction of bulk volume) ...In=term%20name&filter=gas-water+contact gas-water contact]), or (2) having porosity and/or [[permeability]] values below a “cutoff” limit for productivity.
    22 KB (3,076 words) - 13:56, 24 January 2022
  • Permeability
    ...a function of the degree of mineral alteration (such as dolomitization), [[porosity]] development, and fractures. [[:file:permeability_fig2.png|Figure 2]] show ===Porosity===
    19 KB (2,716 words) - 19:02, 20 January 2022
  • Subregional and local pressure compartments
    The fluids in a [[Porosity#Carbonate pore systems|porous]] [[bioherm]] completely encased in shale (as
    3 KB (440 words) - 17:58, 17 February 2022
  • Well planning
    * [[Porosity]] and [[permeability]] ...usually [[Basic open hole tools#Gamma ray|gamma ray]], deep resistivity, [[porosity]], sonic, pad-type resistivity, [[dipmeter]], checkshot survey, and sidewal
    6 KB (779 words) - 15:09, 24 January 2022
  • Water resistivity determination
    ...(ϕ) can be derived from logs. (For more information on methods to derive [[porosity]] and the Archie equation, see [[Standard interpretation]]. For more on der ...resistivity tools such as deep induction (ILd) or deep laterolog (LLd) and porosity log(s).
    13 KB (2,077 words) - 17:26, 18 January 2022
  • Trap leakage
    | Capillary pressure exceeds [[displacement pressure]] of fracture [[porosity]] in the seal.
    3 KB (445 words) - 16:58, 1 February 2022
  • Petroleum exploration
    ...te downward below. This migration is controlled by rock’s permeability and porosity. :φ(p(t)) = porosity at reservoir pressure p, fraction
    15 KB (2,331 words) - 19:12, 17 April 2019
  • Sea level cycles and carbonate sequences
    * [[Predicting carbonate porosity and permeability]] * [[Basics of carbonate porosity formation and preservation]]
    7 KB (989 words) - 20:45, 6 April 2022
  • Influence of mechanical stratigraphy on deformation styles
    ===Porosity and Clay Content Effect on Mechanical Properties=== ...multiple factors influencing variation in mechanical stratigraphy such as porosity and permeability, mineralogy, and layer thickness.
    23 KB (3,162 words) - 17:28, 5 December 2023
  • Mapping unconformities
    ...sequence boundaries) is part of an effective exploration effort. Facies, [[porosity]] systems, and hydrocarbon shows are evaluated in context with an unconform ...the location of coarse gravels may be a primary reason to retain or create porosity, accurate regional reconstructions of erosional networks and their provenan
    7 KB (977 words) - 20:39, 4 February 2022
  • Pore systems
    * [[Porosity]]
    3 KB (442 words) - 13:52, 4 April 2022
  • SEM, XRD, CL, and XF methods
    ...age often defines hidden character of sample, e.g., may show directional [[porosity]] and flow boundaries, internal structures of fossils. || ...permeability]] and log response.<ref name=pt05r127>Pittman, E. D., 1979, [[Porosity]], diagenesis, and productive capability of sandstone reservoirs, in Scholl
    11 KB (1,477 words) - 15:25, 24 January 2022
  • Wiki write off
    * [[Relationship between porosity and permeability on fractured basement reservoir]]
    3 KB (399 words) - 12:51, 28 September 2015
  • Correlation and regression analysis
    ...mong multiple physical properties. The investigation of [[permeability]]-[[porosity]] relationships is a typical example of the use of correlation in geology. ...tocorrelation can also be used to measure the degree of similarity among [[porosity]] values measured at different locations.
    9 KB (1,366 words) - 16:37, 19 January 2022
  • Structural exploration: location selection
    ...d off crest and away from hinges to obtain an early assessment of matrix [[porosity]] in the reservoir.
    4 KB (545 words) - 18:52, 3 February 2022
  • Paleogeography and prospect identification
    ...s [[Fossil assemblage|biofacies]], net reservoir thickness (lithology or [[porosity]]), and [[Seismic facies mapping|seismic facies]] (i.e., [[clinoforms]], pa
    4 KB (491 words) - 14:27, 21 March 2022
  • Reservoir system analysis
    ...nning electron microscopy (SEM)|scanning electron microscopy]] analysis, [[porosity]]/[[permeability]]–[[Characterizing_rock_quality#What_is_r35.3F|r<sub>35<
    4 KB (547 words) - 18:09, 1 April 2022
  • Measurement while drilling
    ...gy provides downhole evaluation of formation gamma ray, resistivity, and [[porosity]] while drilling is in progress. Mechanical parameters such as the followin ...10 years. [[Basic open hole tools#Gammy ray|Gamma ray]], resistivity, and porosity logs obtained during drilling are commonly being used to supplement or repl
    8 KB (1,083 words) - 21:18, 19 January 2022
  • Reservoir modeling for simulation purposes
    ...each environment of deposition to estimate permeability from log derived [[porosity]] and estimation of vertical permeability ...structural analysis to reservoir properties such as thickness, lithology, porosity, and pore fill<ref name=pt10r27>Ruijtenberg, P. A., Buchanan, R., Marke, P.
    17 KB (2,234 words) - 21:21, 19 January 2022
  • Flow units and containers
    ...e. Petrophysical characteristics, such as distinctive log character and/or porosity-[[permeability]] relationships, define individual flow units. Inflow perfor * [[Porosity]]–permeability cross plots (r<sub>35</sub>—defined later)
    9 KB (1,231 words) - 18:42, 1 April 2022
  • Fractured reservoir evaluation
    ...] in the form of (1) increased reservoir [[permeability]], (2) increased [[porosity]], and/or (3) increased permeability [http://wiki.seg.org/wiki/Dictionary:A {{quotation|''Type 1''—Provide the essential porosity and permeability to the reservoir
    26 KB (3,674 words) - 21:21, 19 January 2022
  • Oilfield water analysis
    * [[Porosity]] * [[Core-log transformations and porosity-permeability relationships]]
    7 KB (1,011 words) - 16:57, 20 January 2022
  • Log analysis: lithology
    ...reviews some common techniques that can be used to solve for lithology and porosity. It also addresses some commonly encountered lithologies and their characte ...nerals points. Arrows indicate the effects of gas, salt, sulfur, secondary porosity, and shaliness.
    25 KB (3,189 words) - 17:24, 18 January 2022
  • Amplitude (seismic)
    ...below. The most influential factor on the P wave velocity changes include porosity, gas saturation, external pressure and pore pressure. The relationship betw
    8 KB (1,291 words) - 15:49, 18 January 2017
  • Influence of depositional environment on sandstone diagenesis
    * [[Sandstone porosity and permeability prediction]] * [[Predicting sandstone reservoir porosity]]
    8 KB (1,129 words) - 14:11, 6 April 2022
  • Sandstone sedimentology and stratigraphy
    ...ir and within individual rock units. These changes result in variations in porosity, fluid distribution, and permeability. However the main diagenetic process ...as a direct relationship to the porosity and permeability of the rock. The porosity and permeability are directly influenced by the way the sand grains are pac
    27 KB (3,802 words) - 19:32, 9 January 2024
  • Show evaluation
    ...show may still be viable hydrocarbon-bearing reservoirs. Conversely, poor porosity-permeability zones that have gas increases may be nonproducible. For the mo ...saturated when later tested or electric logged. In zones of high effective porosity and permeability, the rocks will initially be flushed, then return to their
    18 KB (2,670 words) - 18:21, 21 January 2022
  • Statistics overview
    ...an is 22.5 (halfway between 22.0 and 23.0), the value below which half the porosity values fall. The mid-range value is 29.05. The mode is the most frequently ...might be used to determine if a particular oil field exhibits a multimodal porosity distribution, indicating the presence of multiple lithologies. Another situ
    16 KB (2,483 words) - 19:28, 19 January 2022
  • Seismic data display
    ...associated with changes in rock properties in the subsurface. Lithology, [[porosity]], pore fluid, and a host of other variations are often detectable in the s ...should be aware of the type of anomaly you are trying to discern, such as porosity, gas zone, or facies changes. This allows the correct selection of a data p
    9 KB (1,404 words) - 21:17, 19 January 2022
  • Petrofabrics
    * Deformation effects on [[porosity]] and [[permeability]]
    4 KB (447 words) - 15:17, 3 February 2022
  • Trap
    ...metric closure integrates vertical and areal closure with pay thickness, [[porosity]], and [[Water saturation|hydrocarbon saturation]] to provide the volume of
    4 KB (614 words) - 17:02, 12 April 2022
  • Mudlogging: gas extraction and monitoring
    ...e volume of gas liberated. However, ROP increases may reflect increasing [[porosity]] and, at constant gas saturation, increasing gas liberated. Comparing ROP, ...tion to invalidate the total hydrocarbon log as an indicator of gas-filled porosity in the formation. It does mean, however, that care must be taken when compa
    9 KB (1,327 words) - 15:28, 24 January 2022
  • Pore throat size and connectivity
    ....com/data/bulletns/1992-93/data/pg/0076/0002/0000/0191.htm Relationship of porosity to permeability to various parameters derived from mercury injection–capi
    4 KB (650 words) - 14:23, 4 April 2022
  • Hydrofractured seal leakage
    ...ient is estimated from [[Basic_open_hole_tools#Density|density logs]] or [[porosity]] trend.
    5 KB (679 words) - 17:11, 1 February 2022
  • Molyneux:sandbox
    * [[Secondary porosity]]
    5 KB (543 words) - 23:45, 8 January 2015
  • Pressure detection
    ...of overpressured zones, have a lower density (because of abnormally high [[porosity]]) than normal shales at a given depth. The density of shale cuttings can b ...normally high porosity and lower thermal conductivity, a doubling of shale porosity from 10 to 20% should cause a decrease in conductivity of only about 1% (wi
    16 KB (2,450 words) - 21:42, 20 January 2022
  • Austin Chalk, onshore U.S. Gulf Coast
    ...o economical as the contrasting “noisy chalk” (fractured chalk) due to the porosity contained in the matrix (over 8%) that may have allowed charging under over Dravis, J.J., 1991. Regional depositional setting and porosity evolution of the Austin Chalk Formation, South Texas. In: Austin Chalk Expl
    8 KB (1,200 words) - 21:22, 3 March 2022
  • Geological heterogeneities
    ...ormation on lithofacies and stratification sequences, plug or whole core [[porosity]], [[Permeability|permeability]], and [[Water saturation|fluid saturation]] ...mples of the determination and mapping of structure, [[fluid contacts]], [[porosity]], bed thickness, lateral bed continuity, and various other attributes of r
    17 KB (2,232 words) - 21:22, 19 January 2022
  • China Shale Gas & Liquids - Bohai Bay Basin
    ...e stage with 0.68% to 1.16% Ro (Zhao et al., 2018). The shale matrix has a porosity of less than 10% and permeability of less than 1×10-3 μm2. Intergranular ...ess of resource development (Li et al., 2019). Although the averaged shale porosity is in range of 4.5% to 13.1% (Song et al., 2015), oil in-place within the S
    8 KB (1,251 words) - 15:51, 14 March 2022
  • Cross-borehole tomography
    * Identification of high [[porosity]] zones between wells (where porosity is clearly related to seismic velocity) ...correlations and the log to tomography correlations documenting lithology, porosity, fluid saturation, and temperature. The resulting log and tomography displa
    14 KB (2,060 words) - 20:51, 19 January 2022
  • Karst topography
    ...sed of soluble lithology and the lithology has good condition in secondary porosity. ...ne grains (intergranular or primary porosity) and the fractures (secondary porosity) formed by joints, bedding planes, and faults.
    13 KB (2,016 words) - 19:56, 5 April 2019
  • Midale seal capacity and trap type
    * [[Midale porosity, pore geometries, and petrophysics]]
    5 KB (723 words) - 17:02, 12 April 2022
  • Diagenetically complex reservoir evaluation
    ...etic events. Diagenetic inhomogeneities are zones of reduced or enhanced [[porosity]] and/or permeability that are generated by one or a combination of the pro ...in]: AAPG Bulletin, v. 67, p. 744–771.</ref> illustrates the complexity of porosity development in one of the few well-documented examples of a diagenetically
    31 KB (4,171 words) - 18:22, 21 January 2022
  • East Breaks hydrocarbon migration model
    ...ring condensed sedimentation of each cycle. [[Migration]] through matrix [[porosity]] of these effective top-seal mudstones is highly unlikely. Thus, vertical ...reted to occur through [[fracture]]s and faults rather than through matrix porosity.
    10 KB (1,376 words) - 16:00, 23 March 2022
  • Stratigraphic trap seals
    ...oir is a [[Wikipedia:Mesoporous material|mesoporous]] sandstone with 18% [[porosity]] and 10 md [[permeability]], then the bottom [[length::75 ft]] (20 m) of t
    5 KB (632 words) - 20:26, 3 February 2022
  • Seismic facies analysis
    * [[Porosity]] estimations
    6 KB (809 words) - 17:46, 4 February 2022
  • Using and improving surface models built by computer
    ...bon rock thickness is progressively reduced by net to gross ratio, average porosity, and oil saturation, until only the thickness of pores filled with hydrocar ...uilt-by-computer_fig24.png|{{figure number|24}}Incomplete data for net and porosity due to partial penetrations, truncations, baselaps, and so on create proble
    40 KB (6,039 words) - 20:49, 19 January 2022
  • Hydrocarbon reservoirs associated to layered intrusive bodies
    ...oncentric and radial joint systems within basic sills and their associated porosity enhancement, Neuquén Basin, Argentina: National Council of Scientific and ...in a sedimentary basin would be concentrated within shale formations (high porosity) with plenty of oil (Figure 4 and 5).
    10 KB (1,475 words) - 16:29, 4 April 2019
  • Flow units for reservoir characterization
    ...e available in a particular reservoir. (See [[Core-log transformations and porosity-permeability relationships]].) ...mineralogical, textural, and pore level properties and to permeability, [[porosity]], fluid saturations, and capillarity as measured on core plugs. Establish
    16 KB (2,282 words) - 20:46, 19 January 2022
  • Pressure prediction: analysis of cuttings
    ! Pore pressure || Intergranular stress || Rock matrix appearance || [[Porosity]]
    5 KB (818 words) - 17:56, 17 February 2022
  • Seismic data interpretation - recurring themes
    ...e [[seismic reflection]]s, including a [[Fluid contacts|fluid contact]], [[porosity]] variation, or shale density change.
    5 KB (739 words) - 18:51, 27 January 2022
  • Techniques for enhancing seismic facies analysis
    ...hanges in amplitude along a reflector may indicate changes in lithology, [[porosity]], or fluid saturation. For additional details, see Brown.<ref name=ch21r7>
    5 KB (720 words) - 18:51, 4 February 2022
  • Log analysis applications
    ...ion water resistivity) and relates water saturation (''S''<sub>w</sub>) to porosity and true resistivity. ...ore different trace values to each other at the same depth, such as core [[porosity]] and bulk density. Each type of wireline tool measures a different rock pr
    21 KB (3,142 words) - 16:20, 20 January 2022
  • Eolian reservoirs
    ...iated sediments. The relationship between original sedimentary texture and porosity has survived even after extensive [[diagenesis]]. The very poor permeabilit ...he grains pack together relatively closely in wind-rippled strata, and the porosity is lower in these units. Inverse grading is common with low-permeability pi
    19 KB (2,690 words) - 18:42, 1 August 2016
  • Amplitude versus offset (AVO) analysis
    ...) a depth-[[velocity]] model, (2) density and velocity trend curves, (3) [[porosity]] ranges, (4) fluid content variation, (5) Poisson's ratio trend curves, an # The [[lithology]], [[porosity]], and fluid content of a given layer
    12 KB (1,723 words) - 18:41, 20 January 2022
  • Bakken and Three Forks Formations, Williston Basin, North Dakota and Montana (USGS)
    ...rbon and consist of type-II kerogen. The primary reservoir targets are low-porosity and low-permeability members of the middle Bakken and Three Forks (upper pa | Porosity (%) || Variable, Sandstones: 5–9%; Dolomite: up to 15%
    11 KB (1,595 words) - 20:20, 2 June 2021
  • Carbonate reservoir
    ...voirs. The uncertainty in the determination of water saturation, effective porosity, net pay, and permeability will impact the estimation of in-place volumes a ...006, [http://archives.datapages.com/data/bulletns/2006/01jan/0091/0091.HTM Porosity-permeability relationships in interlayered limestone-dolostone reservoirs]:
    38 KB (5,571 words) - 15:31, 16 January 2024
  • Dolomite and dolomitization: Implications for reservoir characterization
    ...dolomites. (a) Curved crystal faces of baroque dolomites (blue color shows porosity), Plane polarized light (PPL).]] ==Dolomitization and Porosity Evolution==
    38 KB (4,996 words) - 21:07, 21 April 2022
  • Petroleum source rocks
    ...primarily physical process of expulsion may follow depending upon (1) the porosity, strength, and composition (e.g., clay, carbonate, or [[evaporite]]) of the
    12 KB (1,616 words) - 17:35, 13 April 2022
  • Wettability
    * [[Porosity]] * [[Core-log transformations and porosity-permeability relationships]]
    12 KB (1,706 words) - 15:11, 24 January 2022
  • Yowlumne field
    ...H. T. M., 1984, Geostatistical estimation of the spatial distributions of porosity and percent clay in a Miocene Stevens turbidite reservoir: Yowlumne field,
    13 KB (1,896 words) - 19:02, 11 March 2019
  • Seismic attributes
    ...plitude at a horizon can, under the correct circumstances, be related to [[porosity]] or net pay in a reservoir interval. With other attributes the physical in
    6 KB (859 words) - 19:42, 27 January 2022
  • Coal bed methane (UB)
    ...M differ from conventional gas. In conventional gas, gas is trapped in the porosity of rock. But in CBM, methane is trapped in the microporosity of coal. This
    5 KB (839 words) - 17:19, 28 March 2019
  • Reservoir drive mechanisms
    ...rs with unconsolidated sediments. It can also be expected to occur where [[porosity]] has been held open by high fluid pressures. Good examples of high pressur
    7 KB (1,052 words) - 18:45, 1 April 2022
  • Lithofacies and environmental analysis of clastic depositional systems
    | [[Porosity]], [[Sonic log curve shape|curve shape]] analysis | Porosity, [[Quick-look lithology from logs|lithology]] (with sonic, density)
    38 KB (5,198 words) - 22:11, 15 January 2024
  • Weyburn field location and trap problem
    * [[Midale porosity, pore geometries, and petrophysics]]
    6 KB (848 words) - 17:34, 3 January 2024
  • Carbonate sedimentary rocks classification
    ...to be the best reservoir quality rock. It is usually characterized by good porosity & permeability, good sorting, and cross-bedding. It is mainly formed near s ...specially if it is partially cemented. It is usually characterized by good porosity & permeability, and good sorting.
    16 KB (1,986 words) - 14:09, 19 December 2023
  • Factors that cause migration
    ...ward motion of each sediment package and is accompanied by a decrease in [[porosity]] as it compacts. The resultant motion of water is continually upward with
    6 KB (918 words) - 15:16, 14 February 2022
  • Stratigraphic predictions from computer simulation
    ...e=ch04r83 />) is focused on predicting organic richness, [[maturation]], [[porosity]], and fluid flow, as well as converting the lithofacies distributions into
    7 KB (895 words) - 16:18, 24 March 2022
  • Multivariate data analysis
    ...a set of interdependent quantities or attributes such as [[grain size]], [[porosity]], [[permeability]], and saturation. Although univariate statistical analys ...l sampling in high pay zones, which may lead to more samples having high [[porosity]] and saturation values, is particularly critical when performing cluster a
    16 KB (2,349 words) - 15:46, 19 January 2022
  • Cross-well electromagnetic tomography monitoring of fluid distribution
    ...ded his work and found a relationship between the formation factor and the porosity (ϕ). Archie further his experiments by combining his formula with the powe ...[[:file:AlsaudKatterbauerFigure6.jpg|Figure 6]]) taking together with the porosity from logs and cores, the water saturation can be interpolated by using Arch
    18 KB (2,715 words) - 18:29, 8 February 2024
  • Reserves estimation
    * ø = [[porosity]] (decimal) from log and/or core data ...to have similar geological or petrophysical properties (depth, lithology, porosity, and so on). While analogy is the least accurate of the methods presented,
    16 KB (2,550 words) - 17:47, 21 January 2022
  • Core alteration and preservation
    ...name=Basan_etal_1988>Basan, P., J. R. Hook, and K. Hughes, 1988, Measuring porosity, saturation, and permeability from cores: The Technical Review, v. 36, n. 4 ...aux, J. M., 1952, Some effects of quick-freezing upon the permeability and porosity of oil well cores: Journal of Petroleum Technology, v. 4, n. 11, p. 19-20.<
    20 KB (2,971 words) - 15:46, 19 January 2022
  • Core handling
    ...th. Disturbing the grain orientations will negate the ability to measure [[porosity]], [[permeability]], and other reservoir properties accurately. The sedimen
    7 KB (1,083 words) - 20:50, 19 January 2022
  • Stimulation
    ...fluid to form a filter cake on the face of the fracture and to plug the [[porosity]] and permeability of the face of the fracture. ...the fracture. The regions that are etched most deeply supply the fracture porosity and conductivity needed to improve flow to the wellbore.
    24 KB (3,633 words) - 13:55, 24 January 2022
  • Drilling a well
    ...e logs will allow the porosity of the reservoir interval to be determined. Porosity is the fraction or percentage of the volume of void space in the rock relat
    15 KB (2,385 words) - 15:05, 1 August 2016
  • Data: sources
    ...alist service companies perform the core analysis. Rock properties such as porosity and permeability are measured on core plugs cut from the core. These are ab ...nclude the following data: horizontal permeability, vertical permeability, porosity, water saturation, oil saturation, grain density, and sometimes a brief des
    43 KB (6,686 words) - 13:44, 18 March 2019
  • Risk: expected value and chance of success
    ...(or confidence) that '''[[reservoir rock]] '''is present, of sufficient [[porosity]] and [[permeability]] to be productive, and in some minimal thickness and ...ence in the existence of at least a minimal reservoir—thickness, extent, [[porosity]], and effective [[permeability]]. Under this approach, encountering a wet,
    22 KB (3,173 words) - 19:27, 19 January 2022
  • Relative permeability
    ...mogeneous section of a reservoir system. The reservoir system rock has a [[porosity]] of 30% and a permeability of 10 md ([[Characterizing_rock_quality#What_is
    9 KB (1,351 words) - 13:31, 5 April 2022
  • Bakken and Three Forks Formations, Williston Basin, North Dakota and Montana
    ...OC) and contain Type II kerogen. The primary reservoir targets are the low porosity and low permeability members of the middle Bakken and upper Three Forks, wi
    7 KB (1,004 words) - 22:08, 4 March 2022
  • Utilization of the industrial revolution 4.0 in oil and gas exploration
    ...ef> used the ELM approach to assist in determining rock properties such as porosity and permeability. Also, Zhao et al.<ref name=Zhaoetal_2020>Zhao, B., Ratnak ...maining wells, the network model is then implemented to estimate reservoir porosity and permeability.
    21 KB (3,096 words) - 20:59, 21 April 2022
  • Scanning electron microscopy (SEM)
    ...gative depressions than from elsewhere on the sample surface. Therefore, [[porosity]] information can be readily characterized with the SE2 electrons. ...useful in revealing the 3-D distribution of mineral types, organic matter, porosity, and the like in shale (and other rock) samples.
    16 KB (2,441 words) - 20:24, 23 January 2019
  • Tectonic modeling
    * Scott, T., E., Nielsen, K., C., 1991, The effects of porosity on the brittle-ductile transition in sandstones: Journal of Geophysical Res * Dunn, D., E., LaFountain, L., J., Jackson, R., E., 1973, Porosity dependence and mechanism of brittle fracture in sandstones: Journal of Geop
    16 KB (2,083 words) - 21:28, 2 February 2022
  • Tuscaloosa Marine Shale, Gulf Coast Basin, Louisiana and Mississippi
    ...lly found that calcite concentration is greater near the base of the TMS. Porosity ranges from 4.78% to 6.59% in the HRZ compared to 3.86% to 9.86% in the TMS
    7 KB (1,007 words) - 21:15, 3 March 2022
  • Structural play geology
    * Composition–[[porosity]]–[[grain size]] predictions ...seals in structural traps can take the form of compaction (reduction in [[porosity]], [[permeability]], and/or pore size) or dilatancy (increase in permeabili
    18 KB (2,422 words) - 14:21, 2 February 2022
  • Condensate banking effect
    ...the petrophysical properties of the rock. In lower permeability and lower porosity reservoirs, condensate banking effect is more significant due to the shorta ...ity, µ is the fluid viscosity, ct is the compressibility, and &phi; is the porosity.
    21 KB (3,040 words) - 15:22, 12 December 2022
  • Pinedale field
    ...ths of about 8500 to 14,500 ft (2600–4400 m) and are tight with fairly low porosity (mostly <10%) and very low (micro-Darcy) permeability. The tight nature of ...factors, including structure, reservoir sandstone and siltstone thickness, porosity development, permeability, and reservoir pressure, which are in turn relate
    16 KB (2,521 words) - 17:13, 29 January 2016
  • Glossary
    ;PPP:pinpoint [[porosity]]
    5 KB (840 words) - 13:51, 18 March 2019
  • Rock-water reaction: formation damage
    * [[Porosity]] * [[Core-log transformations and porosity-permeability relationships]]
    17 KB (2,380 words) - 18:23, 21 January 2022
  • Stratigraphically complex fields
    * Complex [[porosity]]-permeability and [[capillary pressure]] relationships (a broad scatter in
    8 KB (983 words) - 20:49, 19 January 2022
  • Thermal maturation
    ...eling programs—maturation of source rocks, reservoir [[diagenesis]], and [[porosity]] evolution—are affected by thermal and burial history.<ref name=ch17r91>
    8 KB (1,113 words) - 18:10, 24 January 2022
  • New Albany Shale, Illinois Basin, southwestern Indiana
    5. Mastalerz, M., A. Schimmelmann, A. Drobniak, and Y. Chen, 2013, Porosity of Devonian/Mississippian New Albany Shale across a maturation gradient –
    7 KB (1,107 words) - 21:50, 4 March 2022
  • Mudstones
    ...changes influence oil and gas yields and hydrocarbon generation kinetics, porosity development, and the occurrence, composition, and diagenetic behavior of th ...hacs, B. Klimentidis, J. Ottmann, and M. Dumitrescu, 2013, An SEM study of porosity in the Eagle Ford Shale of Texas, in W. K. Camp, E. Diaz, and B. Wawak, eds
    16 KB (2,352 words) - 18:46, 4 December 2023
  • FWhitehurst sandbox
    * Reservoir quality has a good table of porosity types
    22 KB (3,024 words) - 21:42, 19 December 2014
  • Surficial geochemistry and hydrocarbon detection methods
    * Free gas in the effective [[porosity]]
    10 KB (1,443 words) - 16:08, 25 January 2022
  • Mudlogging: drill cuttings analysis
    * [[Porosity]]
    10 KB (1,482 words) - 15:25, 24 January 2022
  • Wattenberg field
    *Low porosity and permeability reservoirs ...Figure 12]]). Reservoir parameters are as follows: pay thickness 10–50 ft, porosity range 8%–12%, permeability range 0.1–0.05 md, reservoir temperature 260
    72 KB (10,249 words) - 20:06, 15 January 2024
  • Dolomite
    ...rock changed to enable dissolving out of the less stable, Ca-rich domain. Porosity could easily increase under these conditions.
    9 KB (1,409 words) - 19:14, 3 March 2016
  • Seismic interpretation
    ...Lithologie interpretation is aimed at determining changes in pore fluid, [[porosity]], [[fracture]] intensity, lithology, and so on from [[seismic data]]. Dire
    10 KB (1,520 words) - 18:48, 21 January 2022
  • Borehole imaging devices
    ...canner images record changes in rock resistivity caused by variations in [[porosity]] and clay content of a small rock volume in the vicinity of the borehole w
    10 KB (1,313 words) - 16:24, 18 January 2022
  • Petroleum basins of Turkey
    ...cate that natural bitumen did not penetrate into host rock due to very low porosity and permeability. The Tmax and Ro values indicate that natural bitumen were ...eous carbonates. These units are carbonates and mostly mud-stones. Primary porosity is low, but the fractured nature gives the unit a relatively high permeabil
    52 KB (7,769 words) - 20:28, 18 January 2017
  • Borehole gravity applications: examples
    ...he sharp difference in density at the arrow is caused by a remote higher [[porosity]] zone not detected by the gamma-gamma density log. The broader difference
    11 KB (1,596 words) - 18:08, 24 January 2022
  • Carbon dioxide (CO2) storage
    ...onstraints for finding the right place to store CO<sub>2</sub> include a [[Porosity|porous]] and [[Permeability|permeable]] [[reservoir]] rock overlain by an i ...e the reservoir conditions viable for injection, e.g., [[permeability]], [[porosity]], and thickness?); site details (is the site economically and technically
    37 KB (5,487 words) - 21:14, 11 March 2019
  • Shale-gas resource systems
    ...stem where porosity is derived primarily from matrix as opposed to organic porosity. BV = bulk volume; R2 = linear correlation coefficient.]] ...r conversion.<ref name=Jrv2007 /> Likewise, it was shown that such limited porosity (4–7%) can store sufficient gas under pressure-volume-temperature (PVT) c
    73 KB (10,728 words) - 18:16, 11 January 2024
  • Super basins
    ...can play a major role, controlling pinch-outs, truncations, wedge belts of porosity, and migration pathways.<ref name=Levorsen_1943>Levorsen, A. I., 1943, Disc ...esent in this basin. The Wilcox play (Cenozoic), characterized by its high porosity (15%-23%) and permeability (10-100 md), and reservoirs of Jurassic - Cretac
    27 KB (3,791 words) - 19:35, 11 October 2022
  • Burial destruction
    ...de dilution.<ref name=ch11r29>Parker, C., 1974, Geopressures and secondary porosity in the deep Jurassic of Mississippi: Transactions of the Gulf Coast Associa
    11 KB (1,525 words) - 18:50, 1 February 2022
  • Basin-centered gas systems: examples
    * Porosity: <13% * Porosity: 5-10%<ref name=Ryder_1998 /><ref name=Ryderandzagorski_2003 />
    25 KB (3,445 words) - 19:01, 14 March 2016
  • Geothermal energy
    ...g; to more than 380&deg;C; 104&deg; to more than 716&deg;F) are found in [[Porosity|porous]] and [[Permeability|permeable]] rocks at shallow depths (less than
    13 KB (1,918 words) - 18:12, 2 April 2019
  • Structural exploration: thrust belt example
    ...e aperture. This integration allows for a direct calculation of fracture [[porosity]] and fracture [[permeability]] for the reservoir.
    14 KB (1,897 words) - 20:01, 3 February 2022
  • Basin-centered gas systems: evaluation and exploration strategies
    ..., coal-bearing environments typically have poor reservoir properties. High porosity and permeability in reservoirs are not desirable attributes for the develop ...d composition (gas with little or no producible water) in conjunction with porosity (<13%), permeability (<0.1 md), thermal maturation (>0.7% Ro) data, and sus
    34 KB (5,070 words) - 15:11, 23 August 2016
  • Prudhoe Bay field
    ...ubs/sandsto2/data/a059/a059/0001/0300/0347.htm Lithofacies, diagenesis and porosity of the Ivishak Formation, Prudhoe Bay Area, Alaska], ''in'' D. A. McDonald
    11 KB (1,634 words) - 16:34, 26 April 2016
  • Appalachian Basin Marcellus gas play
    ...apability of the Marcellus Shale include thickness, total organic content, porosity, permeability, thermal maturity, pore pressure, depth, gas show characteris ..., they blew down very quickly, indicating limited wellbore connectivity to porosity, permeability, and natural fracturing. A few early Marcellus completions in
    89 KB (13,415 words) - 19:16, 16 January 2024
  • Drill stem testing
    ...accommodate the test. If [[offset]] data are available, the magnitude of [[porosity]], permeability, and reservoir pressure should be identified. Knowledge of | [[Porosity]]
    26 KB (4,009 words) - 15:09, 24 January 2022
  • Production testing
    * ''ϕ'' = [[porosity]] (fraction)
    14 KB (2,165 words) - 18:42, 20 January 2022
  • Pressure transient testing
    * ''ϕ'' = [[porosity]] (fraction)
    15 KB (2,314 words) - 17:45, 21 January 2022
  • Contourites
    ...e-grained sediments,preserving good petrophysical characteristics, such as porosity, permeability, and [[lateral]] and vertical transmissibility of fluids, mus
    13 KB (1,889 words) - 19:11, 6 April 2016
  • Vaca Muerta play
    ...n these sectors show the best reservoir characteristics (averages: TOC 5%; porosity 12%; clay 10%–20%; water saturation 20%), the most adequate geomechanical ...9.jpeg|Figure 9]]). Because thick units with high TOC (and associated high porosity) are fundamental elements for a landing zone, the proximal bottomsets and t
    77 KB (11,201 words) - 20:07, 15 January 2024
  • Fluid contacts
    ...system shapes|pore networks]] (such as combined [[fracture]] and matrix [[porosity]]) may also have a thick transition zone, with different fluid types produc
    19 KB (2,690 words) - 21:20, 19 January 2022
  • Shale-oil resource systems
    ...hale]] oil is almost always from a tight mudstone with some related matrix porosity.<ref name=EOGResources2010>EOG Resources, 2010, [http://wwgeochem.com/refer ...resource systems. Acid dissolution of carbonates as a source of secondary porosity has been cited in the Bakken Middle Member along with thin-section substant
    97 KB (14,873 words) - 19:53, 11 January 2024
  • Paleontology
    ...000267 bioclast]s. Diagenetic conditions in this facies formed reservoir [[porosity]]. Recognition of the fossils in [[Mudlogging: drill cuttings analysis|cutt
    17 KB (2,331 words) - 20:11, 10 August 2016
  • Faults: structural geology
    ...wing distinct tips even where they are closely spaced (bottom left photo). Porosity loss resulting from granular rearrangement and clay accumulation in the ban ...wie, 2001, Damage zone development over micron to kilometer scales in high-porosity Navajo sandstone, Utah: Journal of Structural Geology, v. 23, p. 1825–184
    63 KB (9,496 words) - 16:51, 15 January 2024
  • Rock-water reaction
    * [[Core-log transformations and porosity-permeability relationships]]
    17 KB (2,356 words) - 19:24, 19 January 2022
  • Structural restoration
    # decompaction (i.e., porosity/rock volume restoration),
    17 KB (2,335 words) - 17:14, 13 October 2022
  • Delta plain, upper
    ...t), including grain size, directional properties, [[dip]] angles, relative porosity, and sedimentary structures; sand body isopach map (lower left); and repres ...entrated along distinct layers within the overall sand body. Potential for porosity traps is great in the braided-channel environment.
    33 KB (4,905 words) - 16:40, 6 April 2016
  • Cross section
    ...] are displayed ([[:file:geological-cross-sections_fig2.png|Figure 2]]). [[Porosity]] logs may also be important, and if [[seismic data]] are part of the cross
    20 KB (3,029 words) - 16:09, 24 January 2022
  • Basin-centered gas systems: elements and processes
    ...ommon in indirect BCGSs. Direct and indirect reservoirs always exhibit low porosity (<13%) and low, in-situ permeability (<0.1 md).<ref name=Spencer_1985>Spenc
    20 KB (2,949 words) - 18:24, 6 April 2016
  • Fluid inclusions: analysis and applications
    * Improved understanding of diagenetic systems and porosity evolution
    20 KB (2,691 words) - 21:06, 21 April 2022
  • West Texas Super Basin
    ...source rock, low porosity, and low permeability to conventional reservoir porosity and permeability. These are typically proximal to quality source rocks and ...plays. Hybrid plays are interbedded fine-grained source rocks with higher porosity and permeability conventional reservoirs<ref>Jarvie, D. M, 2012a, [https://
    157 KB (23,278 words) - 18:36, 16 January 2024
  • Cash flow model
    ...e project to be commercial. In particular, requisite values for net pay, [[porosity]], and initial production rate may be crucial in helping the well site geol
    19 KB (2,272 words) - 19:27, 19 January 2022
  • Capillary pressure
    * [[Core-log transformations and porosity-permeability relationships]]
    23 KB (3,315 words) - 16:59, 19 January 2022
  • Geology workstation
    ...terpretation process generates new data elements, including zone average [[porosity]], net pay, and [[hydrocarbon]] pore feet.
    19 KB (2,872 words) - 14:28, 20 January 2022
  • Uncertainties impacting reserves, revenue, and costs
    ...Good examples include field sizes, production rates of wells in a field, [[porosity]]-feet (&phi;h) of reservoirs, and effective well drainage area.
    21 KB (3,123 words) - 19:27, 19 January 2022
  • Contouring geological data with a computer
    ...isplays variation of a geological variable, such as thickness, depth, or [[porosity]], over an area of interest with contour lines of equal value. Often, one o
    25 KB (3,597 words) - 20:49, 19 January 2022
  • Mudstone nomenclature
    ...ply points, (3) water column energy level, and (4) rock properties such as porosity and permeability. Grain size is a commonly used attribute in descriptions a
    58 KB (8,391 words) - 19:46, 20 February 2024
  • Three-dimensional modeling of clinoforms in shallow-marine reservoirs
    ...tones, 50% pDF sandstones, 31% dDF heteroliths, and 11% PD mudstone. Using porosity values that are characteristic of these facies associations in analogous re | Porosity (⊘) of prodelta mudstone (PD) facies association || 0 || %
    113 KB (16,689 words) - 22:11, 15 January 2024
  • Paraná Basin
    * Effective porosity 0.15–0.3
    22 KB (3,382 words) - 19:52, 4 January 2024
  • Basin-centered gas systems: development
    ...lity in direct systems because buoyant accumulations of oil require better porosity and permeability.
    34 KB (4,772 words) - 14:44, 12 March 2019
  • Meandering fluvial reservoirs
    ...0070.htm Three-dimensional distribution of lithofacies, bounding surfaces, porosity, and permeability in a fluvial sandstone—Gypsy Sandstone of northern Okla
    32 KB (4,727 words) - 21:03, 15 January 2024
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