环渤中地区新构造运动期断裂活动与油气成藏关系

doi:10.11743/ogg20090413

Abstract

Abstract:

The area around central Bohai Bay is an important prolific zone,where faults are well developed and faulting during the neotectonic movement played a significant role in migration and preservation of hydrocarbons.The fault activity rate (FAR) method was used to study the relationship between faulting activity and hydrocarbon accumulation/preservation in the area based on analysis of activity changes along the strike of main fault and combinations of faults with different FAR within the zone.In addition,the controlling mechanisms of hydrocarbon accumulation were also discussed in respects of the locations of spill points,the definition of fault carrier systems and FAR,and the relationship between fault throw and thickness of regional caprock.The results indicate that hydrocarbon accumulations in the area are mainly located near faults with moderate or weak activities(FAR<25 m/Ma),while they seldom occur near faults with strong activities(FAR>25 m/Ma) because these faults served mainly as vertical migration pathways,making it hard to form shallow oil accumulations.For these faults,only in areas with relatively weak fault activities can hydrocarbon accumulation occur.

Key words: Neotectonics, fault activity rate, hydrocarbon accumulation, area around the central Bohai Bay, Bohai Bay Basin

CLC Number:

TE122.1

Zhou Xinhuai, Niu Chengming, Teng Changyu. Relationship between faulting and hydrocarbon pooling during the Neotectonic movement around the central Bohai Bay[J]. Oil & Gas Geology, 2009, 30(4): 469-475,482.

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Relationship between faulting and hydrocarbon pooling during the Neotectonic movement around the central Bohai Bay

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