渤海海域盆地石油地质条件与大中型油气田分布特征

doi:10.11743/ogg20190109

Abstract

Abstract:

On the basis of reviewing the petroleum exploration history of the Bohai Sea Basin(the offshore part of the Bohai Bay Basin)and the related petroleum geologic theories,we summarized the Cenozoic tectonic-sedimentary evolution of the Bohai Sea Basin,and analyzed its petroleum geologic conditions,with focus on their significant differences from that of the onshore part of the Bohai Bay Basin.First of all,two sets of high-quality source rocks of the Shahejie Formation and Dongying Formation are developed as the results of two tectonic cycles of the Bohai Sea Basin.The distribution of source rocks of the Dongying Formation is limited to this basin,and the rapid subsidence in late stages contributes to its maturity,both of which manifest the more favorable hydrocarbon source conditions in the Bohai Sea Basin.On the other hand,shallow-extremely shallow-water deltas,a unique series of strata for exploration in the offshore part,are widely developed in the Neogene of the Bohai Sea Basin.In addition,the long-term sustained activities of the Tanlu fault zone in the offshore part eventually resulted in the play fairway with several large-and medium-sized oil and gas fields in the Bohai Sea Basin,which is an important field for oil and gas exploration in the Bohai Sea at present.It's of referential value for future Bohai Sea exploration and related studies to fully understand the particularity of evolution of the Bohai Sea Basin and its unique petroleum geologic conditions and oil and gas accumulation patterns.

Key words: differences between offshore and onshore parts, shallow-water delta, Tanlu fault zone, large-and medium-sized oil and gas field, Bohai Sea Basin

CLC Number:

TE121

Zhong Kai, Zhu Weilin, Xue Yong'an, Zhou Xinhuai, Xu Changgui, Niu Chengmin. Petroleum geologic conditions and distributional features of large- and medium-sized oil and gas fields in Bohai Sea Basin[J]. Oil & Gas Geology, 2019, 40(1): 92-100.

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Petroleum geologic conditions and distributional features of large- and medium-sized oil and gas fields in Bohai Sea Basin

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