Changes

  | part    = Critical elements of the petroleum system

  | part    = Critical elements of the petroleum system

  | chapter = Sedimentary basin analysis

  | chapter = Sedimentary basin analysis

  | frompg  = 4-1

  | frompg  = 4-85

  | topg    = 4-123

  | topg    = 4-85

  | author  = John M. Armentrout

  | author  = John M. Armentrout

  | link    = http://archives.datapages.com/data/specpubs/beaumont/ch04/ch04.htm

  | link    = http://archives.datapages.com/data/specpubs/beaumont/ch04/ch04.htm

  | isbn    = 0-89181-602-X

  | isbn    = 0-89181-602-X

}}

}}

The East Breaks 160-161 minibasin is an example of where more than one [[petroleum system]] can charge the same trap. It contains all the components required for generation, [[migration]], and accumulation of hydrocarbons.  

The East Breaks 160-161 [[minibasin]] is an example of where more than one [[petroleum system]] can [[Calculating charge volume|charge]] the same [[trap]]. It contains all the components required for [[East Breaks hydrocarbon generation model|generation]], [[East Breaks hydrocarbon migration model|migration]], and [[East Breaks hydrocarbon accumulation model|accumulation]] of hydrocarbons.  

==Petroleum system elements==

==Petroleum system elements==

==Petroleum system processes==

==Petroleum system processes==

[[Petroleum system]] processes include trap formation; source-rock [[maturation]]; and generation, expulsion, secondary [[migration]], and accumulation of hydrocarbons within a trap. [[Modeling]] of oil generation within the East Breaks 160-161 minibasin suggests that middle Miocene strata would have begun to generate hydrocarbons only 200,000 years ago and would still be active today. If older strata are the source of the petroleum, then generation must have been delayed until the late Pleistocene.

[[Petroleum system]] processes include [[trap]] formation; [[Source rock|source-rock]] [[maturation]]; and [[Petroleum generation|generation]], [[Hydrocarbon expulsion, migration, and accumulation#Expulsion|expulsion]], secondary [[migration]], and [[accumulation]] of hydrocarbons within a [[trap]]. [[Modeling]] of oil generation within the East Breaks 160-161 minibasin suggests that [[middle Miocene]] strata would have begun to generate hydrocarbons only 200,000 years ago and would still be active today. If older strata are the source of the petroleum, then generation must have been delayed until the [[late Pleistocene]].

An alternative is that the petroleum has migrated after 1.2 Ma from older traps into the East Breaks 160-161 ''Glob alt'' through ''Trim A'' anticlinal traps. Periodic vertical migration of oil probably took place along growth faults between overpressured source beds and more normally pressured reservoirs. Oil accumulated in faulted rollover anticlinal traps with slightly overpressured mudstone seals. Biodegradation of oils reflects shallow accumulation prior to burial of the reservoirs below [[temperature::140°F]] ([[temperature::60°C]]).

An alternative is that the [[petroleum]] has migrated after 1.2 Ma from older traps into the East Breaks 160-161 [[''Glob alt'']] through [[''Trim A'']] [[Anticline|anticlinal]] traps. Periodic vertical migration of oil probably took place along [[growth fault]]s between [[Overpressure and hydrocarbon distribution, Gulf Coast|overpressured]] source beds and more normally pressured reservoirs. Oil accumulated in [[fault]]ed [[rollover]] anticlinal traps with slightly overpressured [[mudstone]] seals. [[Biodegradation]] of oils reflects shallow accumulation prior to burial of the reservoirs below [[temperature::140°F]] ([[temperature::60°C]]).

 

This subsection details aspects of this generation-migration-accumulation model.

* [[East Breaks trap formation]]

* [[East Breaks trap formation]]

* [[East Breaks geochemistry]]

* [[East Breaks geochemistry]]

* [[East Breaks hydrocarbon accumulation model]]

* [[East Breaks hydrocarbon accumulation model]]

* [[East Breaks critical moment]]

* [[East Breaks critical moment]]

==External links==

==External links==

[[Category:Critical elements of the petroleum system]]  

[[Category:Critical elements of the petroleum system]]  

[[Category:Sedimentary basin analysis]]

[[Category:Sedimentary basin analysis]]