Polygonal fault and oil-gas accumulation in deep-water area of Qiongdongnan Basin

被引：0

作者：

Wu, Shiguo ^{[1
,2
]}

Sun, Qiliang ^{[1
,3
]}

Wu, Tuoyu ^{[4
]}

Yuan, Shengqiang ^{[1
,3
]}

Ma, Yubo ^{[1
,3
]}

Yao, Genshun ^{[1
,3
]}

机构：

[1] Key Laboratory of Marine Geology and Environment, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China

[2] Faculty of Geo-Resources and Information, China University of Petroleum, Qingdao 266555, China

[3] Graduate Institute, Chinese Academy of Sciences, Beijing 100049, China

[4] Faculty of Earth Sciences, China University of Geosciences, Wuhan 430074, China

来源：

Shiyou Xuebao/Acta Petrolei Sinica | 2009年 / 30卷 / 01期

关键词：

Seismology;

D O I：

暂无

中图分类号：

P631.4 [地震勘探]; P315 [地震学];

学科分类号：

摘要：

According to 3D high-resolution seismic data, polygonal faults were discovered firstly in Qiongdongnan Basin of the northern continental margin of South China Sea by using the coherent slice and flattening technique. The polygonal fault is tensional fault system with small throws, which is of nontectonic origin. The polygonal fault in the deep-water area of Qiongdongnan Basin has a length from 150 meters to 1500 meters, an interval space from 50 meters to 3000 meters, a fault throw from 10 meters to 40 meters and a dip from 50 to 90 in three layers. Qiongdongnan Basin underwent the syn-rift stage and the post-rift thermal subsidence stage. The tectonic faults were undeveloped in the post-rift stage, which leads to the absence of pathway between source rock and reservoir. The unfavorable migration system is one of the factors restricting oil and gas accumulation in the post-rift stage. The polygonal fault can efficiently serve as the pathway for linking source rock and reservoir to enhance hydrocarbon migration along the polygonal fault. So it is very favorable for oil and gas migration and accumulation in the post-rift stage of the northern South China Sea.

引用

页码：22 / 26