台湾海峡盆地九龙江凹陷新生代关键构造变革及其油气地质意义

doi:10.11743/ogg20190116

Abstract

Abstract:

Hydrocarbon accumulation is closely related with regional tectonic setting and basin formation and evolution.It's pointed out that four stages of critical tectonic transformation occurred in Jiulongjiang Sag through the analysis of two-dimensional multichannel seismic data and regional geological data.As a result, four unconformities formed during the Taiping,Oujiang,Puli and Hai'anshan movements.Controlled by different geodynamic backgrounds and tectonic stress fields at different stages,three styles of extensional structures,namely the stepwise,horst-graben and sliding fault terrace,and two styles of inverted structures,namely fault-restricted and flexural fold structures,are developed in the sag.Through the analysis of tectonic stress backgrounds and hydrocarbon accumulation conditions at different stages,it is believed that the Taiping and Oujiang movements laid the foundation for the formation of traps in the Jiulongjiang Sag,and was a major factor for the development of extensional structural traps;while the uplifting caused by the compressive force from the late Oujiang movement prompted the formation of inverted structures,providing favorable trap conditions for hydrocarbon accumulation.

Key words: tectonic movement, tectonic deformation, key tectonic transformation, petroleum geology, Jiulongjiang Sag, Taiwan Strait

CLC Number:

TE121.1

Qian Xing, Zhang Li, Yi Hai, Wei Zhenquan, Lei Zhenyu, Luo Shuaibing. Key Cenozoic tectonic transformation in Jiulongjiang Sag,Taiwan Strait Basin and its petroleum geologic significance[J]. Oil & Gas Geology, 2019, 40(1): 162-169.

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Key Cenozoic tectonic transformation in Jiulongjiang Sag,Taiwan Strait Basin and its petroleum geologic significance

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