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  • File:Evaluating-fractured-reservoirs fig1.png
    ...lic>r</italic></sub>= matrix permeability, ϕ<sub><italic>r</italic></sub>= matrix porosity.
    (942 × 642 (23 KB)) - 15:00, 14 January 2014
  • File:M31F14v2.jpg
    ...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
    (1,134 × 503 (75 KB)) - 15:16, 18 August 2014
  • File:Evaluating-fractured-reservoirs fig4.png
    ...o fractures 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
  • File:Evaluating-fractured-reservoirs fig3.png
    ...o fractures plotted as a function of fracture width, fracture spacing, and matrix permeability. Copyright: Nelson, 1985</xref>; courtesy of Gulf Publishing C
    (1,931 × 1,127 (80 KB)) - 15:00, 14 January 2014
  • File:Thin-section-analysis fig2.png
    ...n or thin section. In Folk's scheme, the black pattern represents lime mud matrix, the lined pattern represents sparry calcite cement, and the white objects
    (1,959 × 1,366 (182 KB)) - 21:07, 14 January 2014
  • Pore systems
    ...(pore-lining) coarse sandstone || Connected vugs or vugs in a crystalline matrix || Fracture width >50&micro; || Poorly connected vugs or [[oomold]]s in a fine to medium crystalline matrix || Fracture width 5-50&micro;
    3 KB (442 words) - 13:52, 4 April 2022
  • Fractured membrane seal leakage
    ...ined rocks, so it is easier for petroleum to invade the fractures than the matrix porosity. In fact, many fractured rocks with open fractures have apertures ...ry-pressure tests]] because seal failure is through the fractures, not the matrix pore network.
    3 KB (478 words) - 17:09, 1 February 2022
  • Archie equation
    ...bedded (i.e., below limits of logging tool resolution), have clay in their matrix, or have moldic, vuggy, or [[fracture]] porosity require adjustments. The t * 1.8 (or less) for rocks with clayey matrix or [[fracture]]s
    5 KB (703 words) - 13:52, 5 April 2022
  • Intact membrane seal leakage
    ...um fluid pressure) is less than the capillary displacement pressure of the matrix [[porosity]] of the seal. Under these conditions, the relative [[permeabili ...ring]] occurs, oil can leak through the [[fracture]]s without invading the matrix porosity.
    3 KB (475 words) - 17:08, 1 February 2022
  • Pressure prediction: analysis of cuttings
    Abnormal fluid pressure causes abnormal pressure within the rock matrix; this directly affects compaction. Fluid carries some of the overburden str ...arizes the relationships of fluid pressure, intergranular stress, and rock matrix appearance.
    5 KB (818 words) - 17:56, 17 February 2022
  • Density-neutron log porosity
    Formation bulk density is a function of matrix density, porosity, and fluids contained in the pore space. Formation bulk d * ρ<sub>ma</sub> = matrix density (see table below)
    12 KB (1,763 words) - 16:18, 5 April 2022
  • Pore system shapes
    | Negative image of particles making up matrix | Relates only indirectly to particles making up matrix
    4 KB (528 words) - 13:53, 4 April 2022
  • Kerogen type and quality: visual assessment
    To assess [[kerogen]] quality visually, we can separate it from the mineral matrix through acidification. We can then examine the kerogen using transmitted li
    2 KB (300 words) - 18:17, 9 February 2022
  • Types of diagenetic traps
    * [[Secondary porosity]] created by cement and/or matrix dissolution
    2 KB (294 words) - 21:01, 4 February 2022
  • Austin Chalk, Tokio, and Eutaw Formations, U.S. Onshore Gulf Coast (USGS)
    ...within the chalk were the primary targets and petroleum stored in the rock matrix was initially ignored due to the low permeability of the chalk. Continued i
    6 KB (846 words) - 20:58, 6 April 2021
  • Carbonate sedimentary rocks classification
    * Microcrystalline lime mud: matrix component of the rock < 4 μm in size. Based on the relative proportions of matrix and pore-filling components surrounding the framework component, Folk defin
    16 KB (1,986 words) - 14:09, 19 December 2023
  • Sandstone
    percentages of subangular to angular grains, contain more than 15 percents of matrix and poorly-well sorted of grain sorting. Its mean that commonly texture are ...-pepper to uniform medium and gray. Lithic arenites tend to have amount of matrix, of course it can be called lithic wackes which has poorly to very poorly s
    10 KB (1,508 words) - 15:44, 22 March 2019
  • Multivariate data analysis
    ...d P is the number of attributes or variables. For example, a (5 &times; 3) matrix might represent five core samples at different depths on which frequencies ...g the logarithm) prior to establishing the correlation matrix. Because the matrix is symmetrical, there are P(P - 1)/2 potentially different correlation valu
    16 KB (2,349 words) - 15:46, 19 January 2022
  • Coal bed methane (UDip)
    ...orosity reservoir”, one characterized by a complex interaction of the coal matrix and cleat system coupled through the desorption process. The mechanism for # diffusion of the gas through the micropores of the coal matrix, and
    10 KB (1,576 words) - 14:42, 2 April 2019
  • Overpressure causes
    ...nt of compaction. In such cases, the fluid is overpressured and the rock [[matrix]] is undercompacted.
    3 KB (394 words) - 16:23, 16 February 2022
  • Relationship between porosity and permeability on fractured basement reservoir
    # Fracture matrix ...porosity system types. Porous of matrix from a formation that has fracture matrix, usually disconnected each other, so that fluids exchange system extremelly
    29 KB (4,601 words) - 16:09, 12 April 2016
  • Stimulation
    ...e, formation damage, requires a damage removal technique, which is usually matrix acidizing but may occasionally involve hydraulic fracturing. Solvent or sur ...ation at a rate faster than the formation can accept the fluid through its matrix permeability. For example, [[:file:stimulation_fig4.png|Figure 4]] illustra
    24 KB (3,633 words) - 13:55, 24 January 2022
  • Maturation
    ...[[paleolatitude]], pressure, [[Wikipedia:Fluid dynamics|fluid flow]], rock matrix chemistry, and [[Petroleum reservoir fluid properties|pore fluid chemistry]
    3 KB (421 words) - 18:26, 9 February 2022
  • Austin Chalk, onshore U.S. Gulf Coast
    ...sting “noisy chalk” (fractured chalk) due to the porosity contained in the matrix (over 8%) that may have allowed charging under over-pressured settings. In ...ig. 4); Loucks et al. (2021) performed a regional study characterizing the matrix of Austin Chalk; Zheng et al. (2021) defined the benthic oxygenation histor
    8 KB (1,200 words) - 21:22, 3 March 2022
  • Fractured reservoir evaluation
    ...itannica.com/EBchecked/topic/369508/matrix matrix] interaction can isolate matrix hydrocarbons ...ontrolled to not pull water preferentially along fractures and not through matrix
    26 KB (3,674 words) - 21:21, 19 January 2022
  • 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

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