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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
169:(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
62:. 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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Gluyas, J. & Swarbrick, R. (2004) Petroleum
Geoscience. Publ. Blackwell Publishing
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surface (such as clay) that also acts to prevent migration. This is known as
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385:& 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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478:: CS1 maint: multiple names: authors list (
309:trap, masses of salt are pushed up through
314:is significant focus on subsurface salt
454:Sheriff, R. E., Geldart, L. P. (1995).
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157:is an area of the subsurface where the
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246:Stratigraphic trap associated with an
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396:"Petroleum Research Institution"
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210:Stratigraphic trap under an
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330:Hybrid trap formed by the
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18:Stratigraphic trap
550:Petroleum geology
422:"structural trap"
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16:(Redirected from
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347:oceanisation
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283:unconformity
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273:hydrocarbons
212:unconformity
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122:hydrocarbons
56:hydrocarbons
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334:draping of
322:Hybrid trap
261:source rock
167:spill point
163:impermeable
104:fault plane
503:2023-01-27
431:2023-01-27
383:Allen P.A.
370:References
263:; yellow:
234:(caprock).
228:coral reef
184:clay smear
173:Fault trap
34:Fault trap
528:August 2,
474:cite book
406:August 2,
349:process.
307:salt dome
287:evaporite
267:; green:
248:evaporite
232:mudstones
155:anticline
116:; green:
88:anticline
60:reservoir
52:petroleum
544:Category
353:See also
332:mudstone
269:cap rock
135:diapiric
131:tectonic
118:cap rock
112:yellow:
316:imaging
271:; red:
253:(pink).
120:; red:
48:caprock
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259:blue:
251:diapir
159:strata
305:In a
179:fault
58:in a
50:of a
530:2019
480:link
460:ISBN
408:2019
44:trap
42:, a
153:An
38:In
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