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  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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

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