渤海海域断裂相互作用及其油气地质意义

doi:10.11743/ogg20180102

Abstract

Abstract: A great number of extensional and strike-slip faults of various orientations and scales occur in the offshore Bohai Bay Basin, eastern China.Complex areal and vertical combinations exist between these faults and they play a key role in hydrocarbon accumulation in this area.Based on seismic interpretation and structural mapping, this paper mainly focuses on the regional and local interaction patterns of the extensional faults and strike-slip faults and their significances for hydrocarbon accumulation in the study area.On map view, the regional patterns of fault interaction involve conjugate type, orthogonal crossing type and oblique crossing type, while the local patterns of fault interaction can be divided into broom-shaped transfer type, branch transfer type, en-echelon fault transfer type and transition structure transfer type, of which the last type can be subdivided into three sub-types including ramp, horst type and faulted-block.On sectional view, the fault interaction patterns mainly include X-shaped type, hybrid type and superposition type.The fault interaction not only influences basin architecture, but also impactes trap, reservoir and hydrocarbon migration.This study is of great significance for oil and gas exploration in the offshore Bohai Bay Basin.

Key words: extensional fault, strike-slip fault, fault interaction, hydrocarbon accumulation, offshore Bohai Bay Basin

CLC Number:

TE121.2

Yu Yixin, Zhou Xinhuai, Xu Changgui, Wu Kui, Zhou Xin, Liu Yubo. Fault interactions and their significances for hydrocarbon accumulation in offshore Bohai Bay Basin, eastern China[J]. Oil & Gas Geology, 2018, 39(1): 11-19.

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Fault interactions and their significances for hydrocarbon accumulation in offshore Bohai Bay Basin, eastern China

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