Search results

Jump to navigation Jump to search

Page title matches

Page text matches

  • Help:Dated information
    ...969. For future and current events, use phrases such as as of January 2014 or since the beginning of 2010 to signal the time-dependence of the informatio If you must give information or data which will go stale in the future, please use the {{tl|update after}}
    678 bytes (112 words) - 21:38, 14 January 2014
  • Dry hole
    ...[economics]] and technologies change, yesterday's dry hole may be revived (or a twin to it may be drilled) to yield today's successful well.
    322 bytes (52 words) - 13:44, 18 March 2019
  • Interval transit time
    ...ic log, usually in units of μs/ft or μs/m. It is also seen as ''delta t'' or ''Δt''.
    205 bytes (40 words) - 20:03, 14 April 2014
  • Biodegradation
    ...r methanogenic) biodegradation during migration or while in the reservoir, or at surface seeps, typically at temeraptures approximately less than 80°
    791 bytes (108 words) - 19:58, 25 June 2015
  • Template:Namespace detect
    <!--If no or empty "demospace" parameter then detect namespace--> | <!--No "demospace" or "page" parameters, so detect actual namespace-->
    1 KB (119 words) - 12:59, 6 August 2013
  • AAPG Wiki:Privacy policy
    When making an edit or creating a new page on '''{{SITENAME}}''', contributors agree to these uses ...loads, for the purposes of tracking usage volume, diagnosing access issues or problems with the wiki server, and to administer the website.
    2 KB (333 words) - 15:37, 9 October 2013
  • Bioturbation
    ...y and permeability. For instance, burrows filled with sand grains in a mud or clay unit could be conduits for fluid flow if connected. Bioturbation can o
    907 bytes (132 words) - 21:42, 18 September 2014
  • Accumulation
    ...ot contain oil or gas. Accumulations, or pools, are traps that contain oil or gas.<ref name=Vincelette>Vincelette, R. R., E. A. Beaumont, N. H. Foster, 2 ...s smaller than the carrier bed. The seal pore throat breakthrough pressure or the distance to the spill point of the trap, whichever is less, determines
    1 KB (206 words) - 17:37, 27 January 2015
  • Template:Basepage subpage
    <!--If no or empty "page" parameter then detect | subsubpage <!--Subsubpage or lower-->
    757 bytes (63 words) - 21:26, 14 January 2014
  • Strike
    ...lly written as N25E, to distinguish it from dip, which is written 4S, 4SE, or 4 65SE.
    585 bytes (88 words) - 16:06, 11 September 2014
  • User:Cwhitehurst
    ==Pages with missing or problematic figures==
    644 bytes (80 words) - 21:22, 1 June 2015
  • AAPG Wiki:Governance documents
    ;Privacy policy: What one may or may not do with a user's data or behaviour. ;Copyrights: or '''Licensing''' — how people can use the content.
    3 KB (373 words) - 16:41, 31 July 2013
  • Contour
    ...hores), differences between two seismic events or reflections (isochrons), or any variables that can be mapped.
    540 bytes (69 words) - 20:24, 27 March 2015
  • Two- or three-dimensional interpretation
    #REDIRECT [[Seismic data: two- or three-dimensional interpretation]]
    68 bytes (7 words) - 16:05, 21 November 2014
  • File:M91Ch13FG80.JPG
    ...can be used to pick likely fault planes in wells. Changes in dip amplitude or azimuth can indicate that a fault is present. Drag patterns may also be see
    (800 × 660 (102 KB)) - 21:14, 29 April 2015
  • File:Geological-heterogeneities fig2.png
    ...ermeability profiles of (a) fining- or thinning-upward and (b) coarsening- or thickening-upward sequences. ''Fining'' and ''coarsening'' refer to average
    (940 × 630 (40 KB)) - 15:35, 14 January 2014
  • MediaWiki:Gadget-HotCat
    '''HotCat''' allows registered users to quickly add or change categories.
    73 bytes (10 words) - 18:22, 17 January 2014
  • Asphaltenes
    ...remaining oil consists of saturates, aromatics, and nitrogen, sulfur, and/or oxygen (NSO) compounds.<ref name=Petersetal_2012>Peters, Kenneth E., David
    886 bytes (126 words) - 16:34, 25 June 2015
  • File:M106Ch12Table2b.jpg
    ...ce strata type: basinal marine (includes calcareous and marly lithologies) or basinal shale. Volumes of oil and gas in-place, estimated ultimate recovera
    (700 × 474 (70 KB)) - 15:30, 12 May 2016
  • File:M106Ch12Table2.jpg
    ...ce strata type: basinal marine (includes calcareous and marly lithologies) or basinal shale. Volumes of oil and gas in-place, estimated ultimate recovera
    (700 × 442 (69 KB)) - 15:28, 12 May 2016
  • File:M106Ch12Table2a.jpg
    ...ce strata type: basinal marine (includes calcareous and marly lithologies) or basinal shale. Volumes of oil and gas in-place, estimated ultimate recovera
    (700 × 515 (83 KB)) - 15:29, 12 May 2016
  • File:M106Ch12Table2c.jpg
    ...ce strata type: basinal marine (includes calcareous and marly lithologies) or basinal shale. Volumes of oil and gas in-place, estimated ultimate recovera
    (700 × 489 (73 KB)) - 15:30, 12 May 2016
  • AAPG Wiki:Wiki manager
    ...h static web content, but is more akin to the AAPG's nascent blog channel, or its membership engagement functions. ...ted, content-oriented, and technical. They don't have to be a geoscientist or even a petroleum professional, but it would help.
    2 KB (294 words) - 16:44, 22 July 2013
  • Template:Tlx/doc
    ...write it more simply and concisely by using the {{tlc|tlc}}, {{tlc|tld}}, or {{tlc|tlf}} templates. ...name use {{tlx|tl}} or {{tlx|tlx}}, and then use {{tlc|tlc}}, {{tlc|tld}} or {{tlc|tlf}} thereafter.
    726 bytes (127 words) - 17:38, 4 November 2013
  • Template:Tlc/doc
    ...write it more simply and concisely by using the {{tlc|tlc}}, {{tlc|tld}}, or {{tlc|tlf}} templates. ...name use {{tlx|tl}} or {{tlx|tlx}}, and then use {{tlc|tlc}}, {{tlc|tld}} or {{tlc|tlf}} thereafter.
    726 bytes (127 words) - 17:38, 4 November 2013
  • Logging while drilling
    ...tion (look-ahead seismic profiles). Data can be transmitted to the surface or stored for later retrieval.
    2 KB (206 words) - 21:17, 3 December 2015
  • Free water level
    ...m. It produces water only. Zero [[buoyancy pressure]] exists at this level or below.
    525 bytes (76 words) - 14:40, 8 September 2014
  • Template:Period span
    ...e you mis-spelt it, or because it is missing from [[Template:Next period]] or [[Template:Period start]].</span>|{{Ma|{{{1|{{PAGENAME}} }}}|{{period start
    667 bytes (77 words) - 20:45, 4 November 2013
  • File:1024px-WaveRipple.JPG
    Wave ripple or symmetric ripple, from Permian rocks in Nomgon, Mongolia. Photo by Matt Aff
    (1,024 × 768 (251 KB)) - 20:29, 22 December 2014
  • Liptinite
    ...ured (e.g., [[resinite]], [[sporinite]], or [[cutinite]]) and unstructured or amorphous liptinites, sometimes called [[amorphinite]], can occur.<ref name
    788 bytes (102 words) - 19:51, 25 June 2015
  • Trap systems: structural, stratigraphic, and fluidic
    The proposed classification scheme divides [[trap]]s into three main groups or systems, based on the controlling geologic element that created the trap: ...ure|syndepositional]] [[deformation]] or displacement of [[reservoir]] and/or [[seal]]ing units
    3 KB (405 words) - 17:44, 12 April 2022
  • AAPG Wiki:General disclaimer
    ...of the Content and shall not have any liability whatsoever for any direct or consequential damages resulting from the use of any information obtained th ...this Web site or cited, used or discussed in AAPG copyrighted publications or in presentations at events associated with AAPG.
    4 KB (654 words) - 18:31, 2 August 2013
  • Template:Period span1 aux
    ...OR! Start of period {{{period}}} unknown, perhaps because it was mis-spelt or because it is missing from [[Template:Period start]].</span> ...ROR! End of period {{{period2}}} unknown, perhaps because it was mis-spelt or because it is missing from [[Template:Next period]].</span>
    653 bytes (83 words) - 20:49, 4 November 2013
  • File:Using-and-improving-surface-models-built-by-computer fig8.png
    Cross sections showing that surfaces that intersect due to (a) baselap or (b) truncation will incorrectly cross one another.
    (837 × 343 (9 KB)) - 22:32, 13 January 2014
  • Sidetrack
    ...entionally or may occur accidentally. A [[multilateral well|multilateral]] or [[multilevel well]] will have multiple intentional sidetracks drilled to pr
    1 KB (191 words) - 19:41, 3 March 2016
  • Hydrocarbon column
    This term refers to a vertical measure of the reservoir or trap containing hydrocarbons.
    165 bytes (22 words) - 19:51, 14 April 2014
  • File:ST53 Part01 Pg11A.jpg
    ...thin toward the structural high. Growth strata are generally folded in one or more limbs of the structure. In this seismic section, growth strata thin on
    (750 × 509 (230 KB)) - 16:23, 28 July 2015
  • Fault trap regime
    ...ows definitions and examples for the classes and subclasses of these traps or trapping elements. ...ne or more sides by normal faults. Rotation traps hydrocarbons along edges or in corners.
    5 KB (740 words) - 16:04, 13 April 2022
  • File:Reservoir-quality fig1.png
    ...raphic image of sandstone. Dark areas are pores and light areas are grains or cement.
    (950 × 868 (20 KB)) - 18:46, 14 January 2014
  • Sand peel
    ...pture of details in sedimentary features for analysis away from the field, or for use in teaching.
    2 KB (239 words) - 19:40, 9 September 2014
  • File:Checkshots-and-vertical-seismic-profiles fig3.png
    The source position (A or B) should be chosen so that the travel path to each receiver is as nearly v
    (945 × 875 (8 KB)) - 21:28, 13 January 2014
  • Deasphalting
    ...deasphalting is achieved by adding light hydrocarbons, such as [[pentane]] or [[hexane]], to the oil. A similar process can occur in nature when [[methan
    864 bytes (120 words) - 19:55, 25 June 2015
  • AAPG Wiki:Users
    ==User types or roles== | '''Root''' || 3 || Login || No || All || The person or people who can log into the server and edit LocalSettings.php
    2 KB (294 words) - 16:01, 6 August 2013
  • Pore systems
    ...ned [[sandston]]e might be classified as having intergranular mesoporosity or a [[limestone]] as having vuggy macroporosity. |Mega/macro || Clean, coarse sandstone or [[carbonate]] [[grainstone]] ||
    3 KB (442 words) - 13:52, 4 April 2022
  • Types of diagenetic traps
    [[Diagenesis|Diagenetic]] traps occur in two basic categories: early or near-surface traps and late-burial traps. Early or near-surface diagenetic traps are created by the following:
    2 KB (294 words) - 21:01, 4 February 2022
  • Template:If pagename
    {{{ {{#if:{{{page|}}}| {{{page|}}} | {{FULLPAGENAME}} }} <!--Has data, or is empty but defined--> | <!--Else, are we on a subpage or a basepage?-->
    2 KB (203 words) - 18:59, 17 January 2014
  • Template:Documentation/start box
    <!--"heading" not defined in this or previous level--> <!--"heading" has data or is empty but defined-->
    2 KB (205 words) - 13:38, 1 July 2014
  • File:M91Figure162.JPG
    ...encountered with landing a horizontal well if the target zone is too high or too low compared to what is predicted. From Chapter 28, AAPG Memoir 91, by
    (600 × 682 (38 KB)) - 19:32, 30 July 2014
  • Hiatus
    A break or discontinuity in a process. An [[unconformity]] is the physical representa
    217 bytes (28 words) - 20:48, 25 August 2014
  • Fluid-composition trap regime
    Fluid-composition traps are controlled by the physical or chemical properties of the trapped fluids themselves. The [[Wikipedia:Solub ...[[asphalt]], [[tar]]) or solid hydrocarbons ([[albertite]], [[gilsonite]], or [[grahamite]]). || ''Tar Seals'' || ''Bacterial degradation;'' Updip tar se
    3 KB (402 words) - 16:31, 13 April 2022
  • Syncline
    ...ts such as tilting or faulting, among others, a fold should have its crown or crest as the [[anticline]] and the trough of its structures as the syncline ...olded. This is the best term used to describe it rather than “downward arc or trough of a fold” this is because due to events when strata has been over
    3 KB (505 words) - 15:58, 21 March 2019
  • Template:Split/doc
    When two or more distinct topics which share the same or similar title are being written about on the same page, even if they are cl To suggest article names (or more than one), simply pipe them into the template. For example, {{tlx|spli
    1 KB (221 words) - 16:46, 14 January 2014
  • File:M91Figure161.JPG
    ..., with the intent of keeping the well within a specific reservoir interval or hydrocarbon zone. From Chapter 28, AAPG Memoir 91, by Mike Shepherd
    (800 × 534 (36 KB)) - 19:25, 30 July 2014
  • Fold
    ...[[uplift]]. Folds are expressed in [[seismic reflection profile]]s as one or more regions of dipping reflections ([[dip]] domains) that correspond to in ...hether or not the thickness of stratigraphic layers changes in dip domains or across axial surfaces.
    3 KB (495 words) - 15:09, 18 January 2016
  • Petroleum system identification
    ...leum system. An oil or gas seep, a show of oil or gas in a well, or an oil or gas [[accumulation]] demonstrates the presence of a petroleum system.
    2 KB (298 words) - 18:35, 25 January 2022
  • How different structural philosophies govern techniques
    ...al geology, and various university departments and E&P companies favor one or another in their courses and approaches to problem-solving. The major appro * Detailed geometric and/or kinematic studies
    3 KB (422 words) - 20:17, 3 February 2022
  • Paleogeography and prospect identification
    ...l analysis of clastic depositional systems#Shoreline deposits|shorelines]] or [[reef]]s. Mapping thickness of reservoir-quality rocks is also useful for ...ial for containing reservoir rocks, i.e., [[Third-order sequences|lowstand or highstand]], using biostratigraphic markers and regional correlation surfac
    4 KB (491 words) - 14:27, 21 March 2022
  • Paleontologic data
    ...tratigraphic correlation and age determination|biostratigraphic analysis]] or in a geographic array for [[Paleoenvironmental analysis|evaluating paleoenv * Records of species present or absent
    2 KB (268 words) - 15:18, 31 January 2022
  • Paleocurrent
    [[file:1024px-WaveRipple.JPG|thumb|300px|Wave ripple or symmetric ripple, from Permian rocks in Nomgon, Mongolia. Photo by [https:/
    372 bytes (51 words) - 22:00, 17 March 2015
  • Isochron
    Time interval (or isotime or isochron) maps are commonly used for interpreting changes in thickness betw
    1 KB (135 words) - 14:13, 24 November 2015
  • Talk:Introduction to land and leasing
    ...is article is unnecessary and can either be collapsed into another article or deleted entirely.[[User:Cwhitehurst|Cwhitehurst]] ([[User talk:Cwhitehurst|
    225 bytes (29 words) - 14:06, 16 December 2013
  • File:M31F3.jpg
    ...of braided channel deposits (letters on the vertical section refer to core or outcrop photographs). From Deltaic environments of deposition, 1981, Colema
    (2,941 × 1,884 (830 KB)) - 19:02, 15 August 2014
  • Bend
    ...]], in which the well path is designed to change orientation from vertical or high-angle to horizontal.
    1 KB (173 words) - 15:33, 16 March 2016
  • Template:Para/doc
    ...and the second (optional) one is a value for the first example parameter, or (if the first {{tl|para}} parameter is empty) an unnamed example parameter. ...lue (appearance as in example 3). When illustrating hypothetical, variable or user-definable values, use <tt><nowiki><var>value</var></nowiki></tt> (appe
    2 KB (243 words) - 20:59, 4 November 2013
  • Template:Dated maintenance category/doc
    * This template adds a category or dated category to a page. * Parameter 4: Category all the articles go in, dated or not (if there is one).
    3 KB (550 words) - 20:59, 14 January 2014
  • Template:Large link
    ...tation|content="Helper template for main page gallery. Takes one argument, or two for a renamed link. Option: '''size''' with units, e.g. ''size=24px''.}
    295 bytes (39 words) - 19:39, 1 April 2014
  • Build rate
    ...ough the bend (curve) from vertical or high-angle to the desired low-angle or horizontal attitude.
    1 KB (174 words) - 19:33, 3 March 2016
  • Molecular parameter data for oil–oil and oil–source rock correlations
    ...e or on the relative or absolute abundance of specific molecules in an oil or a [[source rock]] extract. ...can be obtained. In addition to correlating an oil directly to another oil or to a source rock extract, certain molecular parameters can be used to estim
    2 KB (294 words) - 21:02, 15 February 2022
  • File:Porosity fig3.png
    ...osity groups: fabric selective, not fabric selective, and fabric selective or not. (After Choquette and Pray, 1970.)
    (950 × 757 (24 KB)) - 18:19, 14 January 2014
  • Basement
    Basement is rock below a sedimentary cover, often [[igneous]] or metamorphic. It is generally not of interest in exploration for oil and ga
    264 bytes (40 words) - 15:52, 10 March 2016
  • Template:Main other
    <!--If no or empty "demospace" parameter then detect namespace-->
    409 bytes (42 words) - 01:17, 14 January 2014
  • Limitations of quantitative fault seal analysis
    ...ale]] sequences. It is not applicable to massive [[carbonate]], [[chert]], or sandstone reservoirs. It has yet to be tested in interbedded shale–carbon ...th which a seal can be risked is thus much greater in a production setting or mature basin than it is in a frontier setting.
    3 KB (398 words) - 17:35, 29 March 2022
  • Extended-reach wells
    ...refers to wells restricted to a platform or pad (because of environmental or economic contraints) that are attempting to access reserves at a significan
    1 KB (186 words) - 19:42, 3 March 2016
  • AAPG Wiki:Ease of use
    ...erences, journals or ability to cut and paste an equation macro into excel or other applications *'''Printing''' - make it easy to print entire articles or selected subsets
    2 KB (266 words) - 15:49, 6 August 2013
  • Trap classification levels
    ...eologic element || Dominant control of the trap—structural, stratigraphic, or fluidic. ...sses? If the trap is fluidic, was closure formed by pressure, temperature, or chemical processes?
    5 KB (665 words) - 18:47, 12 April 2022
  • Template:Template other
    <!--If no or empty "demospace" parameter then detect namespace-->
    435 bytes (45 words) - 18:11, 8 August 2013
  • File:M91Ch13FG82.JPG
    ...ed sections can be seen in a vertical well drilled through a reverse fault or with a highly deviated well penetrating a normal fault. From Shepherd, M.,
    (600 × 820 (92 KB)) - 21:16, 29 April 2015
  • Petroleum system naming
    A unique designation or name is important to identify a person, place, item, or idea. As geologists, we name rock units, fossils, uplifts, and basins. The | A positive [[Oil-oil and oil-source rock correlation|oil-source rock]] or gas-source rock correlation
    3 KB (367 words) - 18:35, 25 January 2022
  • Fracture traps
    ...he structural system because fractures are a result of [[deformation]] and/or displacement and therefore are structural in nature. ...ractured rock or by change from open, permeable fractures to cement-filled or narrow-aperture, low-permeability fractures.
    3 KB (461 words) - 16:04, 13 April 2022
  • Quantitative paleoenvironmental analysis
    ...into clusters. The results of the cluster analysis show faunal groupings, or ''biofacies'', which are often characteristic of specific environments. [[: ...r geologic data to determine or evaluate specific paleoenvironmental zones or settings.
    4 KB (493 words) - 20:00, 31 January 2022
  • File:Log-analysis-applications fig2.png
    ...tive points, SP deflections are calculated and redisplayed as a baselined (or “static”) SP.
    (939 × 983 (9 KB)) - 16:36, 14 January 2014
  • Buoyancy pressure
    Buoyancy is the tendency for a body (or a drop of immiscible fluid) to float or rise when submerged in a fluid of greater [[density]]. Where two immiscible ...re#Capillary pressure concepts|capillary effect]]s—such as a bottle, lake, or cave—the different fluids exhibit a sharp, flat interface.
    4 KB (596 words) - 18:37, 17 February 2022
  • Selecting a surficial geochemistry survey method
    ...er area, to high-grade previously defined exploration leads and prospects, or to determine the type of petroleum (i.e., oil vs. gas) likely to be encount ...cal methods have previously been used successfully in the area of interest or in a geologic analog area?
    6 KB (809 words) - 17:05, 25 January 2022
  • Fossil assemblage
    Fossil assemblages, or faunal assemblages, are simply groups of fossils found together in strata.
    484 bytes (58 words) - 20:11, 12 March 2015
  • Surficial geochemical exploration principles
    ...xploration for petroleum is the search for chemically identifiable surface or near-surface occurrences of hydrocarbons and their alteration products, whi * Hydrocarbon seepage can be active or passive and is visible (macroseepage) or only detectable analytically (microseepage).
    5 KB (687 words) - 19:23, 24 January 2022
  • File:Using-and-improving-surface-models-built-by-computer fig18.png
    The cell is centered on the grid node and lies either inside or outside the polygon. The cell's area is multiplied by its z value (thicknes
    (835 × 790 (37 KB)) - 22:32, 13 January 2014
  • File:M31F25.jpg
    ...m between shot points and vertical scale is 10 milliseconds per time line, or 7.6 m (25 ft). Coleman, J. M., and D. B. Prior, 1981, Deltaic environments
    (1,087 × 1,348 (940 KB)) - 18:21, 18 August 2014
  • Surficial geochemistry: limitations and uncertainties
    ...very real and can significantly affect the [[economics]] of an exploration or development program, the user must be aware of limitations associated with * False seep anomalies can be caused by reworked [[hydrocarbon]]s and/or reworked [[source rock]]s.
    3 KB (418 words) - 21:19, 24 January 2022
  • Help:Stub
    ...g stubs into fuller articles. Very short stubs should be either built upon or deleted — if there is no real content, then links to the article should '''Introductory or definition''' material goes here. The name of the article should appear clo
    1 KB (192 words) - 14:22, 9 October 2013
  • File:NacratonUSGS.jpg
    ...million years or so. Continents can grow when two plates collide, welding, or accreting, the two pieces together. Continents also grow when oceanic crust
    (512 × 599 (332 KB)) - 15:27, 19 August 2014
  • Tertiary migration
    ...rocarbon migration|Migration]] to the surface, either from a [[reservoir]] or [[source rock]]. Also called dismigration.
    440 bytes (58 words) - 21:47, 25 June 2015
  • Trap
    * '''Trap seal'''—an impediment or barrier that interferes with hydrocarbon [[migration]] from the reservoir. ...en reservoir and seal, or (2) boundaries between fluids, such as oil–water or gas–water contacts. Temperature can also control a trap boundary as displ
    4 KB (614 words) - 17:02, 12 April 2022
  • Help:Symbols
    | align="center"| &plusmn; || plus or minus || 0177 || Shift = || &amp;plusmn; || \pm | align="center"| &ge; || greater or equal || 242 || . || &amp;ge; || \geq
    2 KB (296 words) - 16:57, 14 January 2014
  • Type IV kerogen
    ...ee common source rock evaluation errors made by geologists during prospect or play appraisals]: AAPG Bulletin, vol. 93, issue 3, pp. 341-356.</ref>]] ...in thermally immature rocks; dominated by organic matter that was recycled or extensively oxidized during deposition. Sometimes the type IV pathway is no
    1 KB (185 words) - 21:11, 6 July 2015
  • Fold trap regime
    ...p. 219-235.</ref> || rowspan = 2 | ''Local anticline'' || ''Fault bounded or cross faulted'' || ''Relief, symmetry, internal faulting, internal geometry ...rom the horizontal in one direction only and are not a part of a anticline or syncline.<ref name=ch02r11>Rittenhouse, G., 1972, [http://archives.datapage
    6 KB (742 words) - 14:42, 13 April 2022
  • Structural maps and cross sections
    ...ect, regardless of local structural style, level of structural complexity, or exploration maturity: ...tratigraphic thickness variation or has behaved in a [[Ductility|ductile]] or compactive manner during [[deformation]].
    4 KB (504 words) - 14:17, 2 February 2022
  • How to use the trap classification scheme
    ...hic, structural, or fluidic traps. But many traps are a combination of two or three geologic elements. In these traps, basic trapping elements occur in c
    1 KB (191 words) - 18:46, 12 April 2022
  • Pore system fundamentals
    ...-D pore system geometries found in intergranular, intercrystalline, vuggy, or fractured rocks. ...-D pore system geometries found in intergranular, intercrystalline, vuggy, or fractured rocks. Copyright: Coalson et al.;<ref>Coalson, E. B., S. M. Gools
    3 KB (388 words) - 13:52, 4 April 2022
  • File:M91Ch13FG94.JPG
    ...on in areas with thick delta sequences and mobile substrates such as shale or salt. This example is from Upper Triassic deltaic sediments exposed in the
    (800 × 345 (49 KB)) - 21:41, 29 April 2015
  • Basin-fill and trap analysis
    ...h. Basin-fill analysis is looking for [[Stratigraphic trap|stratigraphic]] or [[combination trap]]s by combining [[paleogeography]] with the results of t
    1 KB (189 words) - 18:53, 4 February 2022
  • File:Thin-section-analysis fig2.png
    ...9) and (b) Dunham (1962), both based on textures observed in hand specimen or thin section. In Folk's scheme, the black pattern represents lime mud matri
    (1,959 × 1,366 (182 KB)) - 21:07, 14 January 2014
  • Fracture trap regime
    ...otally mineralized by postfracture cements, typically calcite, [[gypsum]], or silica. | ''Nonmineralized fracture''; Contains no postfracture cements or minerals.
    7 KB (895 words) - 16:04, 13 April 2022
  • Migration pathway map construction
    ...or [[Cross-leaking faults|cross-leak]] and [[Dip-sealing faults|dip-seal]] or [[Dip-leaking faults|dip-leak]]. ...s real JLLPs, areas of cross-seal or cross-leak, and areas of [[dip]] seal or dip leak
    3 KB (405 words) - 18:19, 29 March 2022
  • File:Using-and-improving-surface-models-built-by-computer fig19.png
    The cell's corners are defined by grid nodes. The top is defined by two or more planes passing through the node z values and lie inside the polygon. T
    (817 × 641 (22 KB)) - 22:32, 13 January 2014
  • Archie equation
    * Non-Archie pore geometries (i.e., not intergranular or intercrystalline) (See [[Pore systems]].) ...stments. The table below lists the five variables and methods for deriving or estimating them.
    5 KB (703 words) - 13:52, 5 April 2022
  • Fracking
    ...fluid is lifted to the surface of the back is often called produced water or flowback water. In practice, the withdrawal of fracking fluid to the surfac ...t least 2 times until water is considered feasible to naturally evaporated or removed kesaluran common disposal.
    3 KB (484 words) - 21:18, 27 March 2019
  • Structural styles: data and techniques for evaluation
    ...vidual structures generally have good [[strike]] continuity and poor depth or [[dip]] continuity. Hence, in any newly discovered thrust belt, these same If and when one or more structural styles are ascribed to an area, certain of the structural t
    3 KB (420 words) - 20:13, 3 February 2022
  • User:Matt/Things to do
    Please update or add to this list! * My list of [[/Things to fix or change/]]
    4 KB (630 words) - 15:30, 4 August 2017
  • File:AAPGBullFeb2013ZengFigure4.JPG
    ...ulated with 90deg Ricker wavelets of 20-, 35-, and 80-Hz peak frequencies (or 26-, 45.5-, and 104-Hz predominant frequencies, respectively). No noise is
    (800 × 613 (224 KB)) - 18:22, 30 June 2014
  • Erosional trap regime
    ...boundaries occur along contacts between erosional surfaces and underlying or overlying [[reservoir]s. ...and bottom seals beneath the unconformity. || Regional subcrop; Uniformly or gently dipping reservoir bed beneath an unconformity. Top seal is provided
    5 KB (588 words) - 16:13, 13 April 2022
  • File:Charles-l-vavra-john-g-kaldi-robert-m-sneider capillary-pressure 2.jpg
    The wetting phase rises above the original or free surface in the capillary tube experiment until adhesive and gravitatio
    (1,200 × 828 (279 KB)) - 17:41, 13 September 2013
  • Kerogen type and quality: visual assessment
    ...g transmitted light through a microscope to determine its form (structured or amorphous) and origin. Structured kerogens include woody, herbaceous, [[The ...kerogen in a sample derived from cuttings composites or core (conventional or sidewall). For example, a visual estimate of kerogen type might be stated a
    2 KB (300 words) - 18:17, 9 February 2022
  • Interpreting hydrocarbon shows
    ...indications of hydrocarbons—seen in [[drilling fluid]]s, cuttings, cores, or formation tests—may be of several types:<ref name=ch09r55>Schowalter, T. | Continuous phase || Trapped oil or gas || A slug or filament of oil or gas with a continuous connection through the pore network of a rock
    8 KB (1,130 words) - 17:09, 5 April 2022
  • Pressure trap regime
    ...[[pressure gradient]]s to [[Overpressure causes|overpressure]]s can create or destroy [[Pressure compartment seals|pressure seals]] and create isolated [ | Tilted oil–water contacts; Boundary defined by tilted oil–water or gas–water contact. || colspan = 2 | Hydrodynamic traps; Tilted hydrocarbo
    3 KB (331 words) - 16:30, 13 April 2022
  • Natural-gas liquids
    ...at natural-gas processing plants are called [[natural-gas plant liquids]] or [[liquefied petroleum gasses]] and consist primarily of ethane, propate, bu ...o obtain. The total amounts of NGL, or of the lease condensate production, or both, are commonly reported as part of the [[crude oil]] production, and wh
    4 KB (549 words) - 16:31, 25 June 2015
  • File:Geological-cross-sections fig2.png
    ...o make the cross section more compact. The left track of each log is an SP or gamma ray trace and the right track is a resistivity trace. (From Slatt et
    (1,921 × 1,041 (171 KB)) - 15:32, 14 January 2014
  • Reservoir system
    ...uilibrium with a [[free water level]] (zero buoyancy pressure). It has one or more containers and is located below a seal. ...ble rock 100% saturated with water. It has one or more containers that may or may not be shared with a reservoir.
    4 KB (579 words) - 14:34, 1 April 2022
  • Diagenetic impact on traps
    ...acies or paleostructure. However, if [[diagenesis]] does not follow facies or paleostructure, then the exploration and exploitation risk increases becaus
    2 KB (297 words) - 21:06, 3 February 2022
  • Preparing to go to the field
    ...ning about the formations in the study area—even driving the seismic lines or flying over the area. ...in the necessary permissions from owners and/or authorities to access land or airspace. It's a good idea to get permissions in writing and carry them wit
    5 KB (730 words) - 22:36, 1 February 2022
  • Seal failure prediction
    ...lace through micropermeable lithologies ([[Micropermeable seal leakage]]), or gas is diffused ([[Diffusive seal leakage]]). The most likely mechanism is ...ure|fracturing]] during [[deformation]] or by cumulative micropermeability or [[Diffusive seal leakage|diffusive seal loss]].
    4 KB (571 words) - 18:06, 1 February 2022
  • Agglutinated microfossils
    ...e of stratigraphically significant agglutinated microfossil: agglutinated, or arenaceous, foraminifera. ...orms may include silt or sand grains, [[glauconite]], [[sponge spicule]]s, or even other foraminiferal tests. Some species are highly selective in the ma
    4 KB (468 words) - 15:16, 31 January 2022
  • Diagenetic trap regime
    ...to postdepositional diagenetic processes, which can create new reservoirs or new seals. ...d_flow_characterization#Dissolution_and_associated_processes|dissolution]] or [[Carbonate_reservoir_models:_facies,_diagenesis,_and_flow_characterization
    5 KB (645 words) - 16:14, 13 April 2022
  • Functions of a petroleum landman
    ...the case of an independent landman, the functions vary depending upon his or her area of specialization. Generally, these functions can be divided into ...ades, well trades, joint venture agreements, creation of partnerships, and/or acquisition of entities.
    5 KB (759 words) - 19:25, 19 January 2022
  • EMD Tight Oil & Gas Committee Annual Reports
    ...l session focused on the committee’s area of interest at an annual, region or section meeting of the AAPG; * (c) technical paper presented at an oral or poster session of an AAPG meeting, with slide deck published on Search and
    3 KB (417 words) - 20:29, 20 September 2022
  • Gravity data processing
    ...ues over deep ocean basins because of variations in the crustal thickness, or ''[http://www.hko.gov.hk/education/edu06nature/ele_isostasy_e.htm isostasy] * Upward or downward continuation—a process that attenuates or deattenuates data to simulate what might be observed at different vertical
    4 KB (519 words) - 14:16, 31 January 2022
  • Template:•/doc
    Use {{Tl|Flatlist}} or <code>class="hlist"</code> for flat lists.
    428 bytes (70 words) - 14:42, 5 November 2013
  • Template:Period span/brief/doc
    ...time span (from start to end) in millions of years for a geological period or pair of geological periods. The time span will automatically update when ne ...rameter can be set to 1, 2, etc. to display that number of decimal places, or to -1, -2, etc. to round to the nearest 10, 100, etc. years. The default is
    3 KB (441 words) - 20:48, 4 November 2013
  • Predicting hydrocarbon recovery
    ...l ([http://www.enggcyclopedia.com/2012/03/gas-oil-ratio-gor/ gas-oil ratio or GOR]). For example, if a well has a GOR of 1,000, then B<sub>oi</sub> = 1. ==Estimating recoverable volume of oil or gas==
    5 KB (691 words) - 17:10, 5 April 2022
  • File:Conversion-of-well-log-data-to-subsurface-stratigraphic-and-structural-information fig5.png
    ...les. This method assumes a constant radius of curvature (constant increase or decrease in deviation between survey points). (b) Minimum curvature method
    (1,968 × 1,106 (119 KB)) - 16:38, 14 January 2014
  • Template:Main/doc
    ...fter the heading of the summary, to link to the sub-article that has been (or will be) summarised. This template is '''not''' to be used as a substitute for inline links or as a "[[Template:See also|see also]]". Its usage should be restricted to th
    2 KB (242 words) - 14:36, 9 October 2013
  • Template:Update after/doc
    ...and month, is specified, the tag appears on the ''first'' day of the year or month; {{#expr:{{CURRENTYEAR}}+1}} implies 1 January {{#expr:{{CURRENTYEAR}
    2 KB (289 words) - 21:36, 14 January 2014
  • Postprimary migration and compositional changes
    ...tion path; (2) mixing [[migration]] streams from two or more source rocks; or (3) precipitation of [[asphaltenes]] and other high-molecular-weight compou ...mum probability of interactions. However, if the petroleum moved as a slug or filament, contact with elements that could alter its composition would be m
    5 KB (694 words) - 15:17, 14 February 2022
  • Phases of a seismic project
    ...ruined by sloppy acquisition methods. Common culprits are poor positioning or cabling information (i.e., which receivers are live for which shots). For m ...n acquisition footprint. One should avoid footprints because they can mask or confuse geologic patterns in the data.
    3 KB (455 words) - 22:00, 25 January 2022
  • Special field techniques
    ...ds or lithologic horizons on well logs, separated by distance, as the same or correlative interfaces in the earth), particularly when significant distanc ...ing, thick vegetation, and/or thin [[alluvial]] cover. A seismic shot hole or water well drilling rig can be strategically positioned for collecting such
    3 KB (412 words) - 22:40, 1 February 2022
  • Maturation
    ...ecting its [[Thermal history|thermal]] and [[burial history]]. This change or maturation is measured and can be combined with quality and richness data t ...ed from most maturation indices is dependent on the type of organic matter or material being analyzed.
    3 KB (421 words) - 18:26, 9 February 2022
  • Reservoir drive mechanisms
    * Rock or compaction drive ...reservoir and has a much larger volume than the reservoir (about 10 times) or is in communication with surface recharge. A strong water drive is more eff
    7 KB (1,052 words) - 18:45, 1 April 2022
  • Selling a structural play
    ...to be accepted, we must construct a coherent explanation of the mechanics or tectonics responsible for creating the play. Such explanations can be any o * Appropriate physical and/or mechanical models that clarify the structure's development
    5 KB (738 words) - 15:58, 2 February 2022
  • File:Lithofacies-and-environmental-analysis-of-clastic-depositional-systems fig3.png
    Models of major depositional environments. The curve on the left shows the SP or gamma ray response and the curve on the right shows the relative grain size
    (1,950 × 1,563 (201 KB)) - 21:37, 13 January 2014
  • File:Capillary-pressure fig2.png
    The wetting phase rises above the original or free surface in the capillary tube experiment until adhesive and gravitatio
    (947 × 675 (25 KB)) - 18:22, 14 January 2014
  • File:M114CH10FG02.jpg
    ...structural spillpoint and the hydrocarbon–water contact) and (B) shows to or deeper than the structural spillpoint (presented as the vertical distance b
    (641 × 652 (54 KB)) - 23:02, 8 January 2019
  • File:Oil-and-condensate-analysis fig5.png
    ...fferent attenuations, (b) as star diagrams of selected peak height ratios, or (c) as data tables of peak height ratios. The star diagram is a polar plot
    (1,942 × 2,226 (120 KB)) - 17:17, 14 January 2014
  • Drilling problems
    ...Typically, a dogleg is caused by a change in the [[dip]] of the formation or by a change in the weight applied to the bit. Severe doglegs can result in ...ally form as a result of dog legs. A ''key seat'' is formed when a channel or groove is cut in the side of the hole, parallel to the axis of the hole. Th
    5 KB (732 words) - 21:18, 19 January 2022
  • Economics: fundamental equations for oil and gas property evaluation
    ==Profit or loss equation== ...of any business venture can be expressed as the difference (either profit or loss) between revenue and costs. In other words,
    6 KB (842 words) - 19:26, 19 January 2022
  • Paleogeography
    ...]. Once an [http://en.wiktionary.org/wiki/isochronous isochronous] surface or coeval interval is identified, paleogeography can be reconstructed by integ
    2 KB (242 words) - 15:48, 1 March 2022
  • Scientific method
    The logic sequence, or ''scientific method'', has been the basis of scientific work since the time # Test predictions by observing occurrences or nonoccurrences of the predicted phenomena.
    3 KB (380 words) - 14:31, 18 February 2022
  • File:M106Ch12Fig03.jpg
    ...owing major structural features. Fields and significant wells with oil and/or gas shows are shown; numbers refer to Tables 1–5 in [[Iraq petroleum geol
    (700 × 902 (78 KB)) - 13:57, 12 May 2016
  • Laurentia
    ...million years or so. Continents can grow when two plates collide, welding, or accreting, the two pieces together. Continents also grow when [[oceanic cru
    2 KB (248 words) - 22:12, 3 December 2015
  • Predicting preservation and destruction of accumulations
    ...Other accumulations, however, may be destroyed. Several processes deplete or destroy hydrocarbon accumulations. In many prospects it is not enough just ...lossary.oilfield.slb.com/en/Terms/n/natural_gas.aspx gas] has been diluted or altered so that [[accumulation]]s are no longer economic.
    5 KB (782 words) - 22:36, 31 January 2022
  • Designing a surficial geochemical survey
    * Anticipated target size and shape of the anomaly (or geologic target) * Ability to sample along (and/or between) key [[seismic line]]s
    6 KB (826 words) - 17:33, 25 January 2022
  • Pore system shapes
    * [[Bored or burrowed]] | Pores are irregularly distributed and can be either poorly or very well connected
    4 KB (528 words) - 13:53, 4 April 2022
  • EMD Tight Oil & Gas Committee
    ...d and developing plays in U.S. and international basins. Tight oil and gas or “shale” resources have been the focus of extensive development over the ...nual and commodity reports as needed; stand-in for the chair at leadership or other call-ins/meetings when the chair is unavailable; assist with other co
    4 KB (570 words) - 20:56, 6 April 2021
  • Structural lead and prospect delineation
    * Storage capacity (structural degradation or enhancement effects) * Deliverability (structurally induced enhancement or degradation of [[permeability]])
    4 KB (511 words) - 18:50, 3 February 2022
  • Scientific method: application to exploration
    | 6 || Accept, modify, or reject the hypothesis || Drilling another wildcat well Promoting a well to ...oblem (objective) of an exploration effort is to find large amounts of oil or gas cheaply.
    6 KB (808 words) - 15:30, 18 February 2022
  • Template:Annotated image/Sequence/doc
    * '''float''' — left, center or right (default)
    648 bytes (83 words) - 16:24, 23 January 2014
  • Source rock
    A '''source rock''' is a rock that is capable of generating or that has generated movable quantities of [[hydrocarbon]]s. ...rock is present. If so, then we ask, “How good is it? Will it generate oil or gas? Has it generated hydrocarbons already?” To answer these questions, w
    4 KB (569 words) - 21:38, 4 February 2022
  • Template:Documentation/end box
    <noinclude><div></noinclude><div style="clear: both;"></div><!--So right or left floating items don't stick out of the doc box.--> if "content" fed or "docname fed" since then it is
    4 KB (420 words) - 18:07, 8 August 2013
  • Hydrocarbon migration
    ...[Tertiary migration]] occurs when petroleum moves from one trap to another or to a seep.<ref name=Petersetal_2012>Peters, Kenneth E., David J. Curry, and ...he hydrocarbons laterally up [[dip]] through underlying beds to a [[trap]] or spill point. Lateral migration is also facilitated by meteoric groundwater
    6 KB (865 words) - 14:33, 6 April 2016
  • Combination trap
    ...the trap belongs to one system or another is quite blurred. Traps with two or more trapping elements are called combination traps. ...e classified informally as (1) a hydrodynamically modified anticlinal trap or as (2) a hydrodynamic/anticlinal trap.
    4 KB (538 words) - 18:47, 12 April 2022
  • Diagenesis
    ...of a sediment after deposition.It can have important effects in decreasing or enhancing [[porosity]] and [[permeability]].
    691 bytes (74 words) - 16:13, 22 October 2014
  • Hydrofractured seal leakage
    ...enough, the sum of the [[capillary pressure]] and fluid pressure can equal or exceed the pressure needed to [[fracture]] the rock. The result is natural ...of a [[hydrocarbon column|petroleum column]] whether the seal fails during or after charging. Leakage in deeply buried accumulations occurs only where ge
    5 KB (679 words) - 17:11, 1 February 2022
  • Trip
    ...le - to change a bit for example, either because the old one is worn down, or because the well is about to enter a zone whose conditions require a differ
    450 bytes (82 words) - 13:57, 12 March 2019
  • AAPG Wiki:Main Page
    ...age, you will need a large image with not too many colours, low saturation or low brightness. It's easy to tweak text colour, link colour, etc if needed. ...strike the best balance between filesize (speed) and quality. For line art or other 'flat' images, use PNG for best results.
    2 KB (311 words) - 16:11, 2 April 2014
  • Static oil pressure gradient estimation
    ...]], and [[Wikipedia:Pressure|pressure]]. [[Oil and condensate analysis|Oil or condensate density]] can be estimated to useful accuracy if stock tank [[AP ...tion_fig5-7.png|Figure 1]] to determine oil density. If the GOR is unknown or if there is no dissolved gas in the oil, use the 0 line.
    3 KB (355 words) - 15:18, 17 February 2022
  • Suggested pages
    ** [[Historic plays or fields]] ...t have enough material to properly discuss a topic and need to be added to or completed.
    2 KB (215 words) - 20:43, 10 August 2015
  • AAPG Wiki:Copyrights
    For any reuse or distribution, you must make clear to others the license terms of this work. If you want to import text that you have found elsewhere or that you have co-authored with others, you can only do so if it is availabl
    5 KB (737 words) - 17:01, 9 October 2013
  • 3-D seismic data views
    ...n several ways. Vertical cuts through the data cube are called '''lines''' or '''sections'''. For marine surveys, [[in-line]] is the direction of boat mo Horizontal or subhorizontal cuts through a seismic data cube are called horizontal slices
    3 KB (373 words) - 19:06, 27 January 2022
  • Fractured membrane seal leakage
    ...:Deformation_(mechanics)#Strain|strained]], such as in stratigraphic traps or broad, gentle folds. Even relatively intact, thick seals may be fractured a ...deformation can be evaluated empirically by examining nearby accumulations or outcrops in similar tectonic settings.
    3 KB (478 words) - 17:09, 1 February 2022
  • Phi scale
    ...then calculated. Mean grain size can be expressed in either the millimeter or phi scale, but sorting must be expressed in the phi scale to maintain a sor
    453 bytes (78 words) - 20:55, 27 August 2014
  • Structural exploration: location selection
    ...ons. This approach becomes critical as the structural complexity increases or the structural play concept becomes more sophisticated. ...which it is more appropriate to select a location based on technical needs or data quality rather than optimizing the economic success of the first well.
    4 KB (545 words) - 18:52, 3 February 2022
  • Abnormal hydrostatic pressure
    * [[Reservoir_quality#Compaction|Rock compaction]] or [[Rock dilation|dilation]] Abnormal pressures develop when fluid is unable to move into or out of the local [[Pore system fundamentals|pore system]] fast enough to ac
    3 KB (426 words) - 14:51, 16 February 2022
  • File:GiacomoneEtAlFigure1.jpg
    ...super basins (those with less than 5 billion BOE of cumulative production or remaining recoverable oil and gas) are shown in light blue. DwGoM = deep-wa
    (868 × 600 (145 KB)) - 20:51, 28 October 2021
  • Migration rate calculation
    The rate of [[Hydrocarbon migration|migration]] for [[oil]] or [[natural gas|gas]] can be estimated using [[Fluid flow fundamentals|Darcy' ...cedure for calculating the [[Hydrocarbon migration|migration]] rate of oil or gas is outlined in the table below.
    4 KB (618 words) - 19:40, 14 February 2022
  • Underpressure causes
    Underpressure can be caused by [[burial]] or [[heat]] decrease. ...y [[impermeable]] rocks, it becomes underpressured by burial when faulting or downwarping occurs.
    3 KB (390 words) - 16:23, 16 February 2022
  • Displacement pressure estimation
    ...cury injection measurements || [[Overview of routine core analysis|Cores]] or [[Mudlogging: drill cuttings analysis|cuttings]] | Pore-size distribution || [[Thin section analysis|Thin sections]], cores, or cuttings
    2 KB (258 words) - 18:41, 31 March 2022
  • Inertinite
    ...maceral]] group composed of inert hydrogen-poor organic matter with little or no petroleum-generative potential. Type IV [[kerogen]] is dominated by iner
    688 bytes (93 words) - 19:04, 14 March 2016
  • Help:Introduction
    ...eading|section heading]] (i.e. don't add <nowiki>==Introduction==</nowiki> or similar)
    668 bytes (102 words) - 15:21, 9 October 2013
  • Seismic data: building a stratigraphic model
    The problem addressed in seismic modeling, or simulation, is calculating the seismic response ([http://wiki.seg.org/wiki/ Depth-dependent velocity and density models are needed to identify events or to create a synthetic seismogram. Velocity information can come from a vari
    5 KB (805 words) - 19:06, 27 January 2022
  • Structural exploration workflow
    ...-4.png|Figure 2]]) are most important to perform early in a frontier basin or play. More detailed analyses requiring more detailed data (right half, [[:f
    4 KB (480 words) - 16:22, 3 February 2022
  • Province, basin, system, play, and prospect
    ...in or Paris Basin. The Zagros [[fold]] belt could be a structural province or a petroleum province, not a basin. ...edimentary rocks. However, the moment petroleum is generated, biologically or thermally, a petroleum system is formed.
    6 KB (932 words) - 20:24, 25 January 2022
  • Oil-oil and oil-source rock correlation
    Correlations are comparisons of (1) oils with other oils or (2) oils with [[source rock]] extracts to determine whether a genetic relat ...osing [[migration|migration pathways]] from kitchen areas to new prospects or plays
    3 KB (422 words) - 22:05, 14 February 2022
  • Seepage activity and surficial geochemistry
    ...iles. Active seepage occurs in basins now actively generating hydrocarbons or that contain excellent migration pathways. These seeps are easily detected ...evels of hydrocarbon seepage may only be detectable near major leak points or below the zone of maximum disturbance.
    4 KB (482 words) - 21:00, 31 January 2022
  • Normal hydrostatic pressure
    ...rticle, where the fluid state (liquid or gaseous) is important, the state (or phase) is specified.
    3 KB (480 words) - 13:47, 16 February 2022
  • Energy Minerals Division
    ...helping to organize or support local society meetings, regional, national or international meetings, symposia, workshops, short courses, and field trips
    2 KB (294 words) - 23:39, 19 January 2021
  • The gravity method
    ...nding on the instrument. Other factors, such as errors in positioning data or the movement of the meter, usually cause larger uncertainties in the observ ...mmediate interest) is usually important to acquire, although other surveys or government data may be available for this purpose.
    6 KB (854 words) - 16:19, 20 January 2022
  • Relative permeability
    ...lity. Relative permeability can be expressed as a number between 0 and 1.0 or as a percent. Pore type and formation [[wettability]] affect relative perme ==Why k<sub>ro</sub> or k<sub>rg</sub> is less than k<sub>ab</sub>==
    9 KB (1,351 words) - 13:31, 5 April 2022
  • Meteoric diagenesis
    Meteoric [[diagenesis]] is the modification of deposits at or near the surface in the [[phreatic]] and [[vadose]] zones.<ref name=Scholle
    648 bytes (87 words) - 15:34, 10 December 2015
  • Top and fault seal evaluation
    * Presence or absence of [[hydrocarbon]]s ...ulations. Assessment of percent fill without the ability to risk seal (top or fault) is reduced to a statistical guessing game. They control the vertical
    4 KB (528 words) - 17:48, 24 March 2022
  • Hydrodynamics
    Hydraulic head (H<sub>w</sub>) is the height or elevation above a given subsurface point at which a column connected to a b * H<sub>w</sub> = height above P (ft or m)
    5 KB (658 words) - 22:04, 17 February 2022
  • Carbonate
    ...and XF methods|X-Ray Diffractometry]]. Carbonates more rich in calcite and/or aragonite are called [[limestone]]. Carbonate rocks composed mainly of the
    708 bytes (95 words) - 20:42, 7 July 2016
  • Basin framework
    The particular study area, whether only a part of a basin or an entire basin itself, should be identified on a large-scale geographic ma ...ploration for hydrocarbons within each of these subbasins. We can prepare (or locate) a map showing total sediment thickness and the distribution of hydr
    4 KB (518 words) - 16:42, 18 February 2022
  • Structural domains
    ...region with similar structural properties (e.g., similar [[fold]] vergence or style, shortening, uplift, faulting style, etc.). * Satellite imagery and/or aerial photography (See [[Remote sensing]].)
    3 KB (422 words) - 18:50, 3 February 2022
  • File:M91Ch13FG93.JPG
    ...field, United Kingdom. In map (a), only faults with throws of 20 m (64 ft) or more are shown. These are equivalent to faults that are detectable by seism
    (600 × 704 (72 KB)) - 21:40, 29 April 2015
  • Magnetics: total intensity and residual magnetic maps
    ...al intensity maps show larger scale geologic features, such as basin shape or anomalous rock types deep within the basement. ...of techniques, including running averages, polynomials, low-pass filters, or [http://wiki.seg.org/wiki/Dictionary:Upward_continuation upward continuatio
    4 KB (618 words) - 19:55, 27 January 2022
  • Offshore exploration and exploitation
    ...ect searching for the resources using geophysical methods: Magnetic survey or register, gravimetric survey, and seismic survey. === Magnetic survey or register ===
    5 KB (708 words) - 22:00, 10 April 2019
  • Hydrocarbon column: calculation of maximum height
    or, in mixed units, * ''h'' = thickness of the hydrocarbon column, ft or m
    3 KB (488 words) - 16:13, 31 March 2022
  • Hydrodynamic traps: mapping
    ...lp outline areas where hydrodynamic gradients may have created, destroyed, or modified traps. # Look for [[permeability]] barriers or hydrocarbon-free water levels using pressure-depth plots.
    4 KB (601 words) - 22:27, 17 February 2022
  • Quantitative biostratigraphy
    ...rray of data points, a preferred overall correlation can be defined by one or more line segments. Points falling on the line(s) of correlation are interp ...are based on the sequence of events and not on the stratigraphic intervals or distances between them.
    6 KB (785 words) - 20:58, 31 January 2022
  • Midale seal capacity and trap type
    ...lumn of oil shared by Weyburn and Steelman. Weyburn is a hydrodynamic trap or a combination hydrodynamic–[[stratigraphic trap]]. ...fferent pore types and pore geometries. For an explanation of each diagram or chart see Chapter 9 in ''Exploring for Oil and Gas Traps''.
    5 KB (723 words) - 17:02, 12 April 2022
  • Cracking
    ...molecules break apart into smaller molecules during burial [[maturation]] or in a refinery. [[Kerogen]] in source rocks and oil in reservoirs are cracke
    768 bytes (107 words) - 15:14, 23 August 2016
  • Subregional and local pressure compartments
    ...der) [[pressure compartments]] can be found within normal pressure regimes or [[regional pressure compartments]]. ...outside the bioherm. The bioherm, then, is a pressure compartment that may or may not be abnormally pressured. Other geological features that may form lo
    3 KB (440 words) - 17:58, 17 February 2022
  • Microbial gas
    Also called marsh gas or biogenic gas; typically greater than 99% [[methane]] produced by methanogen
    785 bytes (108 words) - 20:01, 25 June 2015
  • Help:Image
    * For photographs with no line art or text, use JPG or PNG formats.
    2 KB (340 words) - 15:35, 9 October 2013
  • Remote sensing
    * Side-looking airborne radar (SLAR) and/or sonar ...ltitude data or by using a contractor as an intermediary for obtaining and/or processing the imagery
    6 KB (794 words) - 20:06, 2 February 2022
  • Procedure for geometrical analysis
    ...itional sequences]], [[Systems_tracts_and_trap_types|systems tracts]], and/or [[Hierarchy of sequences|parasequence]]s. Recognizing these correlation fea ...ized by onlap of strata deposited in fluvial, deltaic, or nearshore marine or peritidal environments.<ref name=ch21r48>Weber, L. J., J. F. Sarg, and F. M
    6 KB (862 words) - 15:20, 4 February 2022
  • Evaporite
    ...re minerals produced by the evaporation of water. This may occur in marine or nonmarine settings. The common evaporite minerals associated with petroleum
    1 KB (143 words) - 18:48, 3 March 2016
  • File:Flow-units-for-reservoir-characterization fig1.png
    ...unit, it is permissible to define a flow unit that exhibits only weak flow or no flow through it. This property of flow units makes it possible to use a
    (1,487 × 976 (91 KB)) - 23:13, 14 January 2014
  • Regional pressure compartments
    ...tem overlying one or more hydraulic compartments whose pressures are above or below the normal static water pressure.<ref name=ch05r14>Powley, D., E., 19 ...surface (normally pressured hydraulic system). The '''top seal''' is more or less horizontal and usually cuts across stratigraphic units. It forms where
    6 KB (811 words) - 17:58, 17 February 2022
  • Siliceous microfossils
    ...recrystallized, preserved in nodules or concretions, or replaced by pyrite or calcite. ...e and nonmarine environments. Marine diatoms range from [[Upper Jurassic]] or [[Lower Cretaceous]] to [[Holocene]] and are particularly useful for age an
    5 KB (626 words) - 15:18, 31 January 2022
  • Tectonic inversion
    ...normal [[fault]]s are reactivated by [[compression]] (positive inversion), or where reverse faults are reactivated by [[extension]] (negative inversion).
    771 bytes (103 words) - 20:25, 6 July 2015
  • File:M106Ch13Fig01.jpg
    ...en recognized and described which correspond to either a continental block or a suture zone that is amalgamated as a result of the Neo-Tethyan collision
    (700 × 513 (90 KB)) - 19:29, 5 July 2016
  • Depositional trap regime
    ...thology. Where described, trap styles can be listed based on the lithology or composition of the sealing rocks. The outline below shows the classes and s ...servoir distribution. || colspan = 2 | ''Sandstone reservoirs''; Partially or completely isolated by seal.
    10 KB (1,231 words) - 20:28, 4 January 2024
  • Basement fault blocks and fault block patterns
    ...These zones of weakness are periodically reactivated by tectonic stresses or gravitational loading. Consequently, they have influenced depositional patt ...d terrains and demonstrate that the lineations fall into multiple parallel or subparallel sets of varying [[strike]] directions. These overlapping [[frac
    5 KB (617 words) - 19:55, 27 January 2022
  • File:ST53Part01Pg11B.jpg
    ...rata are generally not present above the fold crest, but are folded in one or more limbs of the structure. In this seismic section, growth strata onlap t
    (750 × 511 (141 KB)) - 16:33, 28 July 2015
  • Fishing
    * Bridging off by swelling formations or a collapsed hole. ...material, to sidetrack around the original material, to abandon the well, or to attempt to complete in a shallower zone. Because all but the first of th
    8 KB (1,156 words) - 21:19, 19 January 2022
  • Help:Tutorial
    ...e on the wiki, there are still many more that need to be written, updated, or improved! Any page that has a [[red link]] needs an article. Articles class * Please do not add links to section headings, references, or figure captions.
    8 KB (1,305 words) - 16:59, 27 May 2015
  • Sandstone permeability estimation from cuttings
    | I || Rocks with pores capable of producing gas without natural or artificial fracturing. ...h pores capable of producing gas with natural or artificial fracturing and/or interbedded with type I rocks.
    6 KB (882 words) - 17:19, 6 April 2022
  • Template:Category handler/blacklist
    <!-- Don't categorise on centralised cascade page or its subpages -->
    762 bytes (110 words) - 18:02, 16 January 2014
  • File:Multivariate-data-analysis fig2.png
    ...and 3). Then, combine the two nearest groups by either joining two samples or aggregating a third sample to the previous group of two (1 is aggregated to
    (949 × 348 (7 KB)) - 00:51, 14 January 2014
  • Waterflooding
    ...of oil and free gas by water. In waterflooding, water is injected into one or more injection wells while the oil is produced from surrounding producing w ...invasion or vertical sweep efficiency (''E''<sub>V</sub>) and the pattern or areal sweep efficiency (''E''<sub>P</sub>).
    10 KB (1,468 words) - 18:23, 21 January 2022
  • True resistivity determination
    ...contain formation water only ([[water saturation]] [S<sub>w</sub>] = 100%) or [[formation water]] and hydrocarbons (S<sub>w</sub> < 100%). Using a valid ...filtrate|resistivity (R<sub>mf</sub>)]] is either greater than, less than, or equal to R<sub>t</sub> and can distort deep resistivities. Distortions to r
    3 KB (427 words) - 16:16, 5 April 2022
  • Governance
    * Avoid complexity or obscurity
    718 bytes (103 words) - 15:23, 6 August 2013
  • Postaccumulation cementation
    ...a petroleum phase may retard [[diagenesis]] in an [[accumulation]], sooner or later [[reservoir quality]] decreases with increasing age and burial.<ref n ...y]]). In low-permeability [[tight gas reservoirs: evaluation|tight sands]] or carbonates, the capillary [[displacement pressure]] in the reservoir rock m
    3 KB (430 words) - 15:35, 1 February 2022
  • Surficial geochemical interpretation guidelines
    ...one or more survey lines may indicate the location of discrete structural or stratigraphic targets within the survey area. If the basin or play is characterized by predominantly vertical migration, then the correla
    8 KB (1,128 words) - 22:24, 31 January 2022
  • Petroleum source rock formation
    ...hesis and nutrient supply. Under appropriate conditions, phytoplankton and/or algal/bacterial mats form in lacustrine, estuarine, and marine paleoenviron ...cted sediments at depths below wave base, in stagnant waters where density or temperature-stratified water columns form, and in other areas where oxygen
    2 KB (296 words) - 17:35, 13 April 2022
  • Limitations of oil correlations
    ...similar thermal maturities. Except in cases of extreme overmaturity of one or more of the samples, these problems can usually be overcome by an experienc ...or differences in technique between laboratories. The amount of acceptable or “normal” difference varies greatly, depending on the range of maturitie
    5 KB (784 words) - 15:28, 15 February 2022
  • Activation energy
    ...for chemical transformations, commonly expressed in kilocalories per mole or kilojoules per mole. Activation energy distributions are used in [[maturati
    781 bytes (109 words) - 15:13, 23 August 2016
  • Help:Contents
    * Add or remove categories from articles to make things easier to find. You might li ...://www.codecogs.com/latex/eqneditor.php even if you don't]), please do add or fix equations
    3 KB (435 words) - 19:31, 16 April 2014
  • Early carbonate diagenesis
    Early [[diagenesis]] occurs at the surface or in the shallow subsurface. It is usually responsible for much of the cement ...ater flow combined with other factors result in precipitation of aragonite or magnesium (Mg) calcite.
    10 KB (1,352 words) - 19:07, 6 April 2022
  • Petroleum
    ...s composed mainly of hydrogen and carbon and found in the gaseous, liquid, or solid state in the Earth; includes hydrocarbon gases, bitumen, migrated oil
    825 bytes (118 words) - 20:13, 14 March 2016
  • AAPG Wiki:Terms of use
    ...any changes to articles, and has full scientific authority over acceptance or rejection of alterations and deletions.
    848 bytes (125 words) - 16:58, 9 October 2013
  • File:Mth14ch04f01.jpg
    ...of water. Dark gray indicates oil fields. Light gray refers to salt domes or tabular salt. From Results and Conclusions of a Horizontal-drilling Program
    (700 × 525 (111 KB)) - 16:00, 7 December 2015
  • Using analogs to identify critical elements
    ...luck finding rabbits if he did not understand their habits—where they live or what and when they eat. In the same way, we learn about oil and gas fields ...trap to work. When we study local analog fields within a region or basin, or perhaps in a similar productive setting in another part of the world, we ca
    3 KB (498 words) - 16:03, 18 February 2022
  • Seismic data and mapping structure
    ...d|3-D data]]. The recipes described on the pages that follow apply to hand or computer work.
    2 KB (320 words) - 19:10, 27 January 2022
  • Parasequences (fourth- and fifth-order sequences)
    ...000–200,000 years in duration) to be the building blocks of most reservoir or field studies. ...l]] extent and forms in response to (for example) [[tidal flat]] migration or [[Deltaic environments|delta]] lobe shifts. Episodic parasequences are of v
    5 KB (619 words) - 22:26, 3 February 2022
  • Natural gas occurrence
    ...ional gas accumulations as "continuous accumulations . . . that exist more or less independently of the water column," and discusses several methods for ...st have produced gas profitably in the United States for at least a decade or two and will undoubtedly become major sources of energy in the decades to c
    4 KB (556 words) - 22:10, 7 January 2015
  • Template:Search/doc
    ...buttons link to search pages on AAPG Datapages, GeoScienceWorld, OnePetro, or Google Scholar. The default search text is the name of the page the widget
    712 bytes (113 words) - 19:33, 22 January 2014
  • Trap classification
    ...ap generally shares enough similarities with other traps in the same basin or in other basins that traps may be classified. The classification chosen dep ...onsequently, a classification scheme such as that used to organize a stamp or coin collection might be more useful, especially one in which a variety of
    8 KB (1,207 words) - 16:33, 13 April 2022
  • Measurement while drilling
    ...igure 1]]). Electrical energy for the system is provided by a battery pack or generated by a small turbine. ...rs are transmitted through the mud as positive or negative pressure pulses or as a continuous, fixed-frequency pressure wave.
    8 KB (1,083 words) - 21:18, 19 January 2022
  • Seismic attributes in geological interpretation
    ...can take the form of dividing the attribute by either the actual isochron or by the number of time samples in the interval. Although this normalization ...the software vendor to provide well-written documentation, either on paper or online, that explains the mathematical calculation involved in generating t
    4 KB (562 words) - 19:42, 27 January 2022
  • Rig personnel
    ...e rig 24 hr a day, the crew(s) usually commute and work 8- or 12-hr shifts or tours. ...ed. A representive from the client company called the ''drilling foreman'' or ''company man'' is typically present on the rig. The company representive i
    3 KB (474 words) - 18:22, 21 January 2022
  • Sidewall coring
    ...ned in zones of interest using gamma logs or SP logs as guides. Percussion or rotary drilled samples provide small bits of formation material, suitable f ...data. Also, percussion sidewall core recovery tends to be low in very hard or fractured rock.
    7 KB (1,100 words) - 21:16, 19 January 2022
  • Template:Category handler
    | <!--Don't categorise (result was "dontcat" or "dontcatdontcat" and so on)--> | other = {{{other|}}} <!--Namespace special or a new namespace-->
    3 KB (255 words) - 12:59, 6 August 2013
  • Petroleum system: geographic, stratigraphic, and temporal extent
    ...then the evidence that a petroleum system existed is absent. An incomplete or just completed petroleum system lacks a preservation time. ...stem. The stratigraphic extent is from below the pod of active source rock or the petroleum of the discovered accumulations in the system, whichever is d
    7 KB (969 words) - 19:14, 25 January 2022
  • File:M106Ch12Table3.jpg
    ...), marl, dense limestone, evaporite-shale, and evaporite-marl. Alternative or old reservoir names provided in comments column. Field number refers to loc
    (700 × 823 (153 KB)) - 15:35, 12 May 2016
  • File:M106Ch12Table3a.jpg
    ...), marl, dense limestone, evaporite-shale, and evaporite-marl. Alternative or old reservoir names provided in comments column. Field number refers to loc
    (700 × 896 (147 KB)) - 15:36, 12 May 2016
  • File:M106Ch12Table3b.jpg
    ...), marl, dense limestone, evaporite-shale, and evaporite-marl. Alternative or old reservoir names provided in comments column. Field number refers to loc
    (700 × 336 (63 KB)) - 15:36, 12 May 2016
  • Calcareous microfossils
    ...ure and high hydrostatic pressure, however, calcareous remains are largely or completely dissolved. The depth below which this occurs, which varies in di ...ular organisms (protists) that secrete a rigid calcite or aragonite shell (or test). Fossils of these forms are found in sediments of brackish to marine
    5 KB (673 words) - 15:16, 31 January 2022
  • Hydrocarbon expulsion, migration, and accumulation
    ...ding the pore pressure of the adjacent carrier bed. Oil or gas is expelled or “squeezed” into the carrier bed due to the differential pressures betwe ...density differential of the hydrocarbons and the formation water. The oil or gas migrates in filaments through the pore system of the aquifer as long as
    6 KB (828 words) - 16:32, 4 April 2022
  • Magnetotellurics
    ...tantly, can be used in places where seismic data collection is impractical or gives poor results. This is the same physical parameter that is measured in ...high-resistivity layers. It is difficult for MT to resolve more than three or four subsurface layers.
    3 KB (486 words) - 17:53, 25 January 2022
  • Migration pathway
    ...tervals. It leaves either no trace or a trace that is continually modified or destroyed by later events. Effective [[hydrocarbon migration]] occurs along ...this pathway, petroleum will accumulate until the trap is full and spills, or leaks, any additional migrating petroleum.
    6 KB (889 words) - 16:50, 29 March 2022

View (previous 250 | next 250) (20 | 50 | 100 | 250 | 500)

Retrieved from "https://wiki.aapg.org/Special:Search"