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due to their greater buoyancy, eventually breaking through and rising towards the surface. This salt is impermeable, and when it crosses a layer of permeable rock, in which hydrocarbons are migrating, it blocks the pathway in much the same manner as a fault trap. This is one of the reasons why there
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trap is formed by the movement of permeable and impermeable layers of rock along a fault plane. The permeable reservoir rock faults such that it is adjacent to an impermeable rock, preventing hydrocarbons from further migration. In some cases, there can be an impermeable substance along the fault
158:(the highest point where hydrocarbons can escape the anticline). This type of trap is by far the most significant to the hydrocarbon industry. Anticline traps are usually long oval domes of land that can often be seen by looking at a geological map or by flying over the land.
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In a stratigraphic trap, the geometry allowing the accumulation of hydrocarbons is of sedimentary origin and has not undergone any tectonic deformation. Such traps can be found in clinoforms, in a pinching-out sedimentary structure, under an
51:. Traps can be of two types: stratigraphic or structural. Structural traps are the most important type of trap as they represent the majority of the world's discovered petroleum resources.
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A structural trap is a type of geological trap that forms as a result of changes in the structure of the subsurface, due to
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rock present in this dome shape, then hydrocarbons can accumulate at the crest until the anticline is filled to the
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surface (such as clay) that also acts to prevent migration. This is known as
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374:& Allen J.R. (1990) Basin Analysis. pp 373. Publ. Blackwell Publishing
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Geological structure allowing accumulation of hydrocarbons in a reservoir
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Hybrid traps are the combination of two types of traps. In the case of
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have been pushed into forming a domed shape. If there is a layer of
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is a geological structure affecting the reservoir rock and
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298:trap, masses of salt are pushed up through
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303:is significant focus on subsurface salt
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443:Sheriff, R. E., Geldart, L. P. (1995).
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411:"structural trap"
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262:hydrocarbons
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111:hydrocarbons
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323:draping of
311:Hybrid trap
250:source rock
156:spill point
152:impermeable
93:fault plane
492:2023-01-27
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372:Allen P.A.
359:References
252:; yellow:
223:(caprock).
217:coral reef
173:clay smear
162:Fault trap
23:Fault trap
517:August 2,
463:cite book
395:August 2,
338:process.
296:salt dome
276:evaporite
256:; green:
237:evaporite
221:mudstones
144:anticline
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77:anticline
49:reservoir
41:petroleum
533:Category
342:See also
321:mudstone
258:cap rock
124:diapiric
120:tectonic
107:cap rock
101:yellow:
305:imaging
260:; red:
242:(pink).
109:; red:
37:caprock
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248:blue:
240:diapir
148:strata
294:In a
168:fault
47:in a
39:of a
519:2019
469:link
449:ISBN
397:2019
33:trap
31:, a
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Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
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