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  • File:Thin-section-analysis fig1.png
    ...m of nonfracture porosity types in sandstones summarizing the influence of porosity type on reservoir quality. (Modified after Pittman, 1979.)
    (933 × 870 (15 KB)) - 21:07, 14 January 2014
  • File:Evaluating-fractured-reservoirs fig1.png
    ...italic></sub>= matrix permeability, ϕ<sub><italic>r</italic></sub>= matrix porosity.
    (942 × 642 (23 KB)) - 15:00, 14 January 2014
  • File:Porosity fig3.png
    Idealized carbonate porosity system showing three basic porosity groups: fabric selective, not fabric selective, and fabric selective or not
    (950 × 757 (24 KB)) - 18:19, 14 January 2014
  • 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
  • File:Core-log-transformations-and-porosity-permeability-relationships fig2.png
    Plot showing shitted core porosity, together with bulk density log.
    (931 × 1,163 (74 KB)) - 18:05, 14 January 2014
  • File:Core-log-transformations-and-porosity-permeability-relationships fig1.png
    Plot showing unshifted core porosity in spiked format, together with bulk density log.
    (938 × 1,169 (73 KB)) - 18:05, 14 January 2014
  • File:Core-log-transformations-and-porosity-permeability-relationships fig4.png
    Air permeability versus helium porosity from North Sea sandstone, conglomerate, and shale.
    (941 × 890 (53 KB)) - 18:06, 14 January 2014
  • File:Core-log-transformations-and-porosity-permeability-relationships fig5.png
    Slip-corrected permeability (run under stress) versus helium porosity from McArthur River Field, Alaska.
    (912 × 1,127 (19 KB)) - 18:06, 14 January 2014
  • File:Core-log-transformations-and-porosity-permeability-relationships fig6.png
    Permeability versus porosity for various size groups in uniformly cemented nonvuggy rocks. (Taken from L
    (934 × 903 (17 KB)) - 18:06, 14 January 2014
  • File:Subsurface-maps fig5.png
    Porosity-weighted average water saturation map for Layer 2 of a Middle Eastern carbo
    (889 × 1,444 (71 KB)) - 20:42, 14 January 2014
  • File:Porosity fig2.png
    Idealized sandstone porosity system showing four basic pore types: intergranular, microporosity, dissolu
    (936 × 434 (96 KB)) - 18:19, 14 January 2014
  • File:Evaluating-diagenetically-complex-reservoirs fig3.png
    Porosity-permeability semilog crosspiot with samples coded according to grain size,
    (920 × 1,033 (84 KB)) - 18:46, 14 January 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
  • File:Using-and-improving-surface-models-built-by-computer fig24.png
    Incomplete data for net and porosity due to partial penetrations, truncations, baselaps, and so on create proble
    (878 × 508 (15 KB)) - 22:33, 13 January 2014
  • File:Evaluating-tight-gas-reservoirs fig3.png
    Histograms showing (a) average porosity values and (b) average permeability values for cored tight gas reservoir fa
    (1,964 × 879 (37 KB)) - 18:47, 14 January 2014
  • File:Porosity fig4.png
    Schematic diagram of packing arrangements for spheres. Porosity values are calculated for cubic (47.6%), orthorhombic (39.5%), rhombohedral
    (1,895 × 1,463 (110 KB)) - 18:19, 14 January 2014
  • File:Using-and-improving-surface-models-built-by-computer fig22.png
    ...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
    (938 × 308 (15 KB)) - 22:33, 13 January 2014
  • File:Forward-modeling-of-seismic-data fig2.png
    ...of a migrated section, the expected seismic signatures of reefs containing porosity and tight reefs have been obtained.
    (1,953 × 1,097 (49 KB)) - 14:35, 14 January 2014
  • File:Subsurface-maps fig6.png
    Porosity thickness (ϕH) maps for the B and C zones from the San Andres Formation re
    (1,944 × 1,484 (237 KB)) - 20:42, 14 January 2014
  • File:Forward-modeling-of-seismic-data fig1.png
    ...section of a carbonate reef play. The reef structure on the left contains porosity, while the reef structure on the right is tight.
    (1,946 × 1,028 (96 KB)) - 14:35, 14 January 2014
  • 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
  • File:Porosity fig1.png
    Schematic of a pore system relating mineralogy, water content, and porosity assessment. (Notes: *lf sample is completely disaggregated during measureme
    (1,942 × 983 (76 KB)) - 18:19, 14 January 2014
  • 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
  • File:Evaluating-fractured-reservoirs fig4.png
    ...ures plotted as a function of fracture width, fracture spacing, and matrix porosity. Copyright: Nelson, 1985</xref>; courtesy of Gulf Publishing Co.
    (1,929 × 1,078 (31 KB)) - 15:00, 14 January 2014
  • 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
  • File:Borehole-gravity fig1.png
    ...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 anomaly
    (933 × 1,451 (17 KB)) - 15:41, 14 January 2014
  • File:Log-analysis-applications fig5.png
    ...istivity) and relates water saturation (<italic>S</italic><sub>w</sub>) to porosity and true resistivity.
    (929 × 801 (40 KB)) - 16:36, 14 January 2014
  • File:Core-description fig1.png
    ...sedimentary structures are depicted graphically as accurately as possible. Porosity amounts in percent can be scaled as needed. (Modified from Casey, 1980; Boy
    (1,879 × 2,521 (232 KB)) - 22:38, 13 January 2014
  • 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
  • File:M91Ch13FG88.JPG
    ...wing distinct tips even where they are closely spaced (bottom left photo). Porosity loss resulting from granular rearrangement and clay accumulation in the ban
    (600 × 585 (272 KB)) - 21:36, 29 April 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
  • User:Febriany/Sandbox
    ...can accumulate hydrocarbons (oil or gas). Reservoir rock must be has good porosity and permeability to accumulate and drain oil in economical quantities. ==Reservoir Porosity==
    12 KB (1,741 words) - 23:03, 30 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
  • User:Rizqi Fadlilah/Sandbox
    ...can accumulate hydrocarbons (oil or gas). Reservoir rock must be has good porosity and permeability to accumulate and drain oil in economical quantities. ==Reservoir Porosity==
    12 KB (1,822 words) - 02:27, 1 July 2015
  • 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
  • File:Mth16Ch7Figure7-1.jpg
    ...y there are few shales against which to measure changes. In this case, the porosity log is the primary reconnaissance measurement. By first finding the porous
    (400 × 528 (39 KB)) - 16:08, 21 May 2014
  • 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
  • User:36.78.101.86/Sandbox
    Porosity (Phi) 5, permeability (k) mD, fluid saturation (S) %, capiler pressure (Pc) *<big>Porosity</big><big></big>
    12 KB (1,800 words) - 00:36, 1 July 2015
  • 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

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