Oil & Gas Geology ›› 2022, Vol. 43 ›› Issue (6): 1321-1333.doi: 10.11743/ogg20220604

• Petroleum Geology • Previous Articles     Next Articles

Evolution and reservoir characteristics of the “Chengbei-Kendong” structural transfer zone in the Bohai Bay Basin

Zhiping Wu1(), Meng Zhang1(), Xiaoqing Zhang2, Di Wang1, Yanjun Cheng3   

  1. 1.School of Geosciences,China University of Petroleum (East China),Qingdao,Shandong 266580,China
    2.CNOOC Research Institute,Beijing,100028,China
    3.College of Earth Science and Engineering,Shandong University of Science and Technology,Qingdao,Shandong 266580,China
  • Received:2022-05-06 Revised:2022-09-28 Online:2022-11-21 Published:2022-11-21
  • Contact: Meng Zhang E-mail:wuzp@upc.edu.cn;b17010013@s.upc.edu.cn

Abstract:

The “Chengbei-Kendong” structural transfer zone in the Bohai Bay Basin has been geometrically characterized and dynamically analyzed to reveal the temporal and spatial differences between the zone and flanking depressions for clarifying the internal evolution and defining the characteristics of hydrocarbon accumulation. The results show that the “Chengbei-Kendong” structural transfer zone exhibits a NW-trending convex concave pattern, which is offset and transformed by NNE- and NEE-trending faults. It has both similarities and differences with the Jiyang Depression controlled by NEE-trending extensional faults and the Bozhong Depression controlled by NNE-trending extensional strike-slip faults. The NW-trending Chengbei-Wuhaozhuang fault is a pre-existing basement fault within the Cenozoic basin, which plays a decisive role in the formation of the zone. Under a tectonic setting of nearly SN regional extension during the Paleogene, the zone experienced differential evolution due to the different degrees of influence by the strike-slip movement of the Tan-Lu fault zone. The structural transfer zone is a favorable zone for the development of buried-hill oil/gas reservoirs. The differential evolution during the Paleogene controls the hydrocarbon accumulation of the Chengbei, Zhuanghai-Zhuangxi, Changdi-Gudong-Kendong areas within the zone. The results and understanding of this study have theoretical and practical significances for structural analysis and hydrocarbon exploration in the Bohai Bay Basin.

Key words: structural transfer zone, structural evolution, hydrocarbon accumulation, Chengbei-Kendong, Bohai Bay Basin

CLC Number: