北部湾盆地构造迁移特征及对油气成藏的影响

doi:10.11743/ogg20110615

Abstract

Abstract:

Geological data and various logging data were integrated to perform geologic interpretation of 3D seismic data of 4 sags in Beibuwan Basin.Characteristics of tectonic transport in this basin were discussed based on analyses of spatial distribution of the major boundary faults of each sag,fault throw at different stages and the transport of depocenter and subsidence center in the basin at different stages.The influences of tectonic transport on hydrocarbon accumulation was also discussed.The tectonic transport of Beibuwan Basin is characterized by wave-like directivity and convergent bias-symmetry.Tectonic transport resulted in present tectonic framework of the basin,controled the source-reservoir-caprock assemblages within the basin,changed temperature and pressure fields,accelerated source rock maturation and evolution,and hydrocarbon migration and accumulation.Because of the influence of tectonic transport,the source rock richness are different from sag to sag in the basin,the Weixinan sag has the richest source rock followed by the Wushi sag,Haizhong sag and Maichen sag.

Key words: subsidence center, depocenter, tectonic transport, hydrocarbon accumulation, Beibuwan Basin

CLC Number:

TE121.1

Hu Wangshui, Wu Chan, Liang Jianshe, Hu Fang, Cai Feng, Chai Haodong, Zou Qiyang. Tectonic transport characteristics and their influences on hydrocarbon accumulation in Beibuwan Basin[J]. Oil & Gas Geology, 2011, 32(6): 920-927.

References

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Tectonic transport characteristics and their influences on hydrocarbon accumulation in Beibuwan Basin

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