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  • Well log analysis for reservoir characterization
    :<math> \Phi \text{d} = \frac{\rho matrix - \rho log}{\rho matrix - \rho fluid}</math> where ρmatrix is the matrix density (the value depends on the lithology, see table 2 for the value refe
    25 KB (3,679 words) - 21:17, 13 March 2019
  • Standard interpretation
    ...sub>), and the fluid density (ρ<sub>fl</sub> at the depth of interest. The matrix density is determined by the lithology. Normally, sandstone is 2.65 g/cm<su ...or effective porosity through the selection of appropriate matrix density. Matrix density can be accurately determined from core measurements. Linear volumet
    25 KB (3,776 words) - 19:53, 18 January 2022
  • Structural exploration: location selection
    ...en drilled 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
  • Kerogen
    ....com/data/bulletns/1980-81/data/pg/0064/0001/0050/0059.htm Role of mineral matrix in kerogen pyrolysis: Influence on petroleum generation and migration]: Ame ...um carbonate > [[gypsum]].<ref name=Esptl1980 /> Variations in the mineral matrix effect related to organic richness occur in whole-rock samples with TOC val
    17 KB (2,363 words) - 17:40, 9 February 2022
  • Sandstone permeability prediction from texture
    ...p://www.britannica.com/EBchecked/topic/369508/matrix matrix] or grains. As matrix, detrital clays can obliterate permeability. Detrital grains of clay are of
    9 KB (1,118 words) - 17:03, 6 April 2022
  • Phosphatic microfossils
    ...osed of crystallites of calcium phosphate (apatite) embedded in an organic matrix. There is one type of stratigraphically significant phosphatic microfossils
    4 KB (496 words) - 18:08, 24 January 2022
  • Seal failure prediction
    ...al entry pressure([[Intact membrane seal leakage]]), open fractures bypass matrix [[pore systems]] ([[Fractured membrane seal leakage]]), [[Natural hydraulic
    4 KB (571 words) - 18:06, 1 February 2022
  • Log analysis: lithology
    ...lot uses the apparent volumetric [[cross section]] (UMAA) and the apparent matrix grain density (RHOMAA) to identify minerals. UMAA represents the projection ...ssplot (see [[Standard interpretation]]). Using this porosity, an apparent matrix density is determined from the following equation:
    25 KB (3,189 words) - 17:24, 18 January 2022
  • Formation evaluation of naturally fractured reservoirs
    ...total porosity while [[Basic open hole tools#Sonic|sonic logs]] read only matrix porosity. The difference is taken as secondary porosity, which might includ ...ry close to 1.0. This is much smaller than the cementation exponent of the matrix (''m''<sub>b</sub>). The cementation exponent of the composite system (''m'
    9 KB (1,380 words) - 17:25, 18 January 2022
  • Strain partitioning
    ...of Structural Geology 13 (1): 21–35.</ref> This effort is achieved through matrix multiplication.<ref name=RamsayHuber1>Ramsay, John; Huber, Martin (1983). T ...ition of pure and simple shear components produce differing geometries, as matrix multiplication is non-communicative. Adaptation and modifications from Rams
    13 KB (1,732 words) - 22:01, 23 January 2019
  • Reservoir simulation study
    ==Preparing matrix properties== ...es describe reservoir characteristics specified at each point of the grid (matrix) overlying the reservoir model ([[:file:conducting-a-reservoir-simulation-s
    19 KB (2,711 words) - 17:48, 21 January 2022
  • Thin section analysis
    The mineralogy and volumes of framework grains, cement, and matrix are essential for reconstructing the [[Diagenesis|diagenetic]] history of a ===Matrix===
    24 KB (3,264 words) - 15:09, 24 January 2022
  • Coalbed methane
    ...which is a [[microporous]] solid with large internal surface areas in the matrix pore structure that can adsorb very large amounts of gas. Lesser amounts ca
    5 KB (691 words) - 21:13, 19 November 2015
  • Sandstone sedimentology and stratigraphy
    ...framework grains, and arenites, wackes, and mudrocks based on the type of matrix present in between the framework grains. Arenites are the best known petrol ...posed mainly of sand-sized minerals or rock grains of about 0.05mm to 2cm, matrix, cement and pore space ([[:File:Sandstone-Fig-2.png|Figure 2]]).
    27 KB (3,802 words) - 19:32, 9 January 2024
  • East Breaks hydrocarbon migration model
    ...osited during condensed sedimentation of each cycle. [[Migration]] through matrix [[porosity]] of these effective top-seal mudstones is highly unlikely. Thus ...interpreted to occur through [[fracture]]s and faults rather than through matrix porosity.
    10 KB (1,376 words) - 16:00, 23 March 2022
  • Kerogen type and hydrocarbon generation
    ...n conversion. Burial history and catalytic effects, due to [[source rock]] matrix chemistry, affect the rate of generation, although these effects are second
    5 KB (651 words) - 16:11, 10 February 2022
  • Micropermeable seal leakage
    ...leum column heights that may exceed the capillary displacement pressure of matrix [[porosity]]. The effective [[permeability]] to petroleum is no longer zero
    5 KB (742 words) - 17:11, 1 February 2022
  • Sandstone diagenesis: composition and texture
    ...during burial than poorly sorted sands. Poorly sorted sands have more clay matrix and nonquartz grains.
    5 KB (729 words) - 20:48, 5 April 2022
  • Fracture analysis
    * Relationship between petrophysical properties of fractures and matrix
    5 KB (644 words) - 15:30, 3 February 2022
  • Coal bed methane (UB)
    ...gan coalification process. When temperature and pressure of coal increase, matrix in coal decrease create micro pore that trap methane. The increase [[fractu
    5 KB (839 words) - 17:19, 28 March 2019
  • Reservoir quality
    ...in a rock. The remaining space in the rock is occupied by the framework or matrix of the rock and, if present, nonconnected pore space. Common porosity types ...ir quality rocks are well-sorted, have well-rounded grains, and contain no matrix material.
    18 KB (2,514 words) - 17:47, 21 January 2022
  • Log analysis applications
    ...to resistivity, raw data to porosities, neutron porosities to a different matrix, metric to English depth units, percent to decimal, and so on. ...the same scales. (Note that this usually requires consistent trace naming, matrix parameters, and decimal/percent conventions for all wells in the database.)
    21 KB (3,142 words) - 16:20, 20 January 2022
  • Sorrento field: water saturation
    ...ols#Density|Density logs]] were the primary source of [[porosity]] values. Matrix density appears to be about 2.68 g/cc, based on core-measured grain densiti
    7 KB (1,044 words) - 16:57, 13 April 2022
  • Rate of penetration
    ...nates is inferred by comparing the relatively slow ROP in rocks having low matrix porosity to rocks having higher porosity and faster ROP. This comparison re
    7 KB (1,049 words) - 19:02, 20 January 2022
  • Cased hole tools
    ...ated gamma rays are measured and used to perform elemental analysis of the matrix and/or the fluids. Variations are being marketed under the general names of
    10 KB (1,427 words) - 16:26, 18 January 2022
  • Fluid inclusions: analysis and applications
    ...composition of the various charges. Fluid inclusions entrapped within rock matrix and healed fractures during diagenesis and trap filling offer a unique tool ...hing: The technique liberates trapped hydrocarbons by crushing the mineral matrix using an organic solvent followed by a specific filtration procedure.<ref n
    20 KB (2,691 words) - 21:06, 21 April 2022
  • FWhitehurst sandbox
    * matrix http://www.britannica.com/EBchecked/topic/369508/matrix
    22 KB (3,024 words) - 21:42, 19 December 2014
  • Sandstone provenance and characterization
    ...ge of granules with angular until subangular roundness. The content of the matrix can appear as the rest up to more than 15 percent, and sorting of grains ca
    10 KB (1,524 words) - 15:29, 14 March 2016
  • Mudlogging: drill cuttings analysis
    * Cementation or matrix
    10 KB (1,482 words) - 15:25, 24 January 2022
  • China Shale Gas & Liquids - Bohai Bay Basin
    ...the oil-mature 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.
    8 KB (1,251 words) - 15:51, 14 March 2022
  • Dolomite and dolomitization: Implications for reservoir characterization
    ...d to dolomite. (C) Carbonates with 90% dolomite and 10% precursor micritic matrix. (D) and (E) Partial or selective dolomitization in allochemical limestone. ...urassic to Lower Cretaceous carbonates of southern Italy, it has increased matrix porosity up to 7 % (Rustichelli et al., 2017). Sometimes, selective dissolu
    38 KB (4,996 words) - 21:07, 21 April 2022
  • Porosity
    ...shape, [[Core_description#Maturity|sorting]], and amount of intergranular matrix and cement.<ref name=pt05r124>Pettijohn, F. J., 1975, Sedimentary rocks, 3r | Grain, cement, matrix, and pore relationships can be established
    24 KB (3,450 words) - 19:09, 20 January 2022
  • Vibro-sesismic to increasing the production rate of coal bed methane
    ...ervoir in general. The CBM gases are adsorbed in a layer within the coal’s matrix (seam) and contain water inside of the crack. So that, CBM well will pass t
    11 KB (1,551 words) - 16:49, 11 January 2016
  • Petroleum source rocks
    ...erogen (e.g., layered or disseminated); (3) whether the bitumen or mineral matrix is load bearing; (4) the properties of generated products (e.g., gas pressu
    12 KB (1,616 words) - 17:35, 13 April 2022
  • SEM, XRD, CL, and XF methods
    ...ee-dimensional images, the morphology of mineral and nonmineral grains and matrix samples can be documented. Pore roughness and interconnectedness can be eva
    11 KB (1,477 words) - 15:25, 24 January 2022
  • Depositional environments
    ..., and mostly impermeable and nonporous because of the high amount of muddy matrix. ...nated fan are the poorly sorted sediment with coarse grain sizes and muddy matrix. But the stream-flow- dominated fans are more sheetlike deposits of finer g
    26 KB (3,851 words) - 20:38, 28 February 2019
  • Overview of routine core analysis
    ...dicular to the first. This value, reported as ''k''<sub>90</sub>, reflects matrix permeability and is close to conventional core analysis permeability.<ref n
    14 KB (2,121 words) - 21:16, 19 January 2022
  • Delta plain, lower
    ...he base of the channel. B. Highly contorted and disrupted bedding in sandy matrix in channel-fill deposits. C. Irregular bedding and burrowed structures in s
    27 KB (4,229 words) - 16:41, 6 April 2016
  • Core description
    ...entary Rocks: Austin, TX, Hemphill Publishers, 159 p.</ref> Detrital clay (matrix) content and the sorting and roundness of grains are all considered in the
    13 KB (1,786 words) - 20:50, 19 January 2022
  • Fault seal analysis for reservoir development
    ...p rock that covers the hydrocarbons. In this case, it has the influence of matrix capillary control and control of the rupture of the hood rock<ref name=Scho
    14 KB (2,146 words) - 19:35, 13 September 2022
  • Electrical methods
    ...etermination of water resistivity]]). This is because the dry soil or rock matrix is a virtual insulator at DC and near DC frequencies. The pore fluid is in
    15 KB (2,130 words) - 21:19, 19 January 2022
  • Wattenberg field
    *Sweet spots controlled by fractures and matrix .... The Plainview consists of very fine- to fine-grained sandstones and clay matrix. Ripple stratification and burrowing is common. The upper contact with the
    72 KB (10,249 words) - 20:06, 15 January 2024
  • Diagenetically complex reservoir evaluation
    ...categories of [[Grain size|size]], [[Core_description#Maturity|sorting]], matrix content, cement content, or pore type, depending on their relative importan ...guished. Semilog crossplots of porosity and permeability keyed to texture, matrix content, and diagenetic component content are very useful. Through examinat
    31 KB (4,171 words) - 18:22, 21 January 2022
  • Fluid contacts
    ...ex [[Pore system shapes|pore networks]] (such as combined [[fracture]] and matrix [[porosity]]) may also have a thick transition zone, with different fluid t
    19 KB (2,690 words) - 21:20, 19 January 2022
  • Geological heterogeneities
    Heterogeneities at the wellbore scale affect matrix [[permeability]], distribution of [[Interpreting hydrocarbon shows#Residual
    17 KB (2,232 words) - 21:22, 19 January 2022
  • Subsurface diagenesis and its relation with diagenetic trap on carbonate rocks reservoir
    ...not always important as the reservoir rocks, because the porosity size of matrix in carbonate is relatively small and have high [[capillary pressure]].
    16 KB (2,395 words) - 21:18, 9 January 2024
  • Scanning electron microscopy (SEM)
    ...omic number) of the sample. For example, the midgray represents [[silica]] matrix; the darker level represents organic matter. The brighter gray level reflec
    16 KB (2,441 words) - 20:24, 23 January 2019
  • Mudstones
    ...and examples of pore types in mudstone. (A) and (F): pores in the mineral matrix; (B–E) and (G): pores in the organic matter. These evolutionary changes i
    16 KB (2,352 words) - 18:46, 4 December 2023
  • Shale-gas resource systems
    ...is suggestive of a hybrid system where porosity is derived primarily from matrix as opposed to organic porosity. BV = bulk volume; R2 = linear correlation c ...interbedded carbonate content (typically sim60%) that provides additional matrix storage capacity in intimately associated (juxtaposed) carbonates.
    73 KB (10,728 words) - 18:16, 11 January 2024
  • Core alteration and preservation
    ...reservoir to atmospheric conditions. Only minor changes occur to the rock matrix. However, the fluids undergo substantial changes in volume. Oil releases ga
    20 KB (2,971 words) - 15:46, 19 January 2022
  • Carbonate reservoir
    ...Fractures can create widespread connectivity in an otherwise heterogenous matrix rock || Can form thief zones with rapid water breakthrough ...n rates. Carbonates can have thick transition zones in reservoirs with low matrix permeability.<ref>Masalmeh, S. K., I. Abu Shiekah, and X. D. Jing, 2005, Im
    38 KB (5,571 words) - 15:31, 16 January 2024
  • Types of wells
    ...particularly effective way of producing fractured reservoirs with very low matrix permeabilities.<ref>Major, R. P., and M. H. Holtz, 1997, [http://archives.d
    22 KB (3,567 words) - 17:20, 11 March 2019
  • Well types
    ...irs with very low [http://www.britannica.com/EBchecked/topic/369508/matrix matrix] [[Permeability|permeabilities]].<ref name=Majorandholtz_1997>Major, R. P.,
    24 KB (3,753 words) - 19:33, 3 March 2016
  • Paraná Basin
    ...pó Formation consists of diamictites of different colors, with silty-sandy matrix and varied nature of clasts. The Vila Maria Formation is comprised of fossi
    22 KB (3,382 words) - 19:52, 4 January 2024
  • In-situ stress characterization and applications
    ...esults in a total of nine stress components that can be organized in a 3x3 matrix, called the stress tensor ([[:File:GeoWikiWriteOff2021-Tayyib-Figure4.png|F
    28 KB (4,031 words) - 15:49, 28 November 2022
  • Subduction zone
    ...mixed assemblage of rock consisting of brecciated blocks in a highly shear matrix. Zone of accumulation on the overriding plate includes forearc, backarc, in
    27 KB (4,033 words) - 20:52, 27 March 2019
  • Shale-oil resource systems
    ...rnett Shale]] oil is almost always from a tight mudstone with some related matrix porosity.<ref name=EOGResources2010>EOG Resources, 2010, [http://wwgeochem. ...y is also minimal with oil in nanopores associated with organic matter and matrix porosity.<ref name=EOGResources2010 /> Although biogenic silica yields are
    97 KB (14,873 words) - 19:53, 11 January 2024
  • Medical geology
    ...n presented two problems namely: (1) since arsenic is bound to the organic matrix, conventional reduction methods of removing arsenic was ineffective; (2) th ...ry can be molded in several ways. After cooling, it sets into a firm solid matrix that is very smooth. This material is used to hold broken anatomical struct
    83 KB (12,860 words) - 14:03, 10 April 2019
  • Delta plain, upper
    ...([[:file:M31F7.jpg|Figure 6A]]). Normally the shell deb is is encased in a matrix of fine-grained organic clays containing abundant pyrite inclusions. As the
    33 KB (4,905 words) - 16:40, 6 April 2016
  • Data: sources
    ...ity log]]s measure the bulk density of a formation, a function of the rock matrix density emitted from the log and the density of the fluids in the pore spac
    43 KB (6,686 words) - 13:44, 18 March 2019
  • Mudstone nomenclature
    ...e.g., micro-crystalline quartz located in the tests of organisms or in the matrix), or grain replacements. A fine-grained rock with 55% detrital quartz in th
    58 KB (8,391 words) - 19:46, 20 February 2024
  • Delta plain, subaqueous
    ...cterized by extremely hummocky, chaotically arranged blocks of clasts in a matrix of highly fractured, flowed sediments.
    60 KB (9,022 words) - 17:17, 21 March 2016
  • West Texas Super Basin
    ...allochthonous carbonates were debrites with coarse shelf clasts in a lime matrix and were easily identifiable in cuttings and imaging logs ([[:file:M125-Wes ...vidual shelf clast can be seen (white and black) floating in the shelf mud matrix. (B) Hanson’s<ref name=Hansn2010 /> isochore map of the Sheldon Carbonate
    157 KB (23,278 words) - 18:36, 16 January 2024
  • Appalachian Basin Marcellus gas play
    ...anic content of key Marcellus Shale play intervals. G/C3 = matrix density ρmatrix (in grams per cubic centimeter); GAPI = gamma-ray API units; SEM = scanning
    89 KB (13,415 words) - 19:16, 16 January 2024

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