Petroleum System in Qiongdongnan Basin of the Continental Margin, the Northern South China Sea
《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]
- Issue:
- 2015年第05期
- Page:
- 80-92
- Research Field:
- 基础地质与矿产地质
- Publishing date:
Info
- Title:
- Petroleum System in Qiongdongnan Basin of the Continental Margin, the Northern South China Sea
- Author(s):
- ZHANG Wei; HE Jia-xiong; LI Xiao-tang; LIU Zhi-jie; ZHANG Jing-ru; GONG Xiao-feng
- 1. Key Laboratory of Marginal Sea Geology, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, Guangdong, China; 2. University of Chinese Academy of Sciences, Beijing 100049, China
- Keywords:
- petroleum system; hydrocarbon generation; migration and conduction; accumulation; Qiongdongnan Basin; South China Sea
- PACS:
- P618.130.2
- DOI:
- -
- Abstract:
- Based on the theory of petroleum system, the different petroleum systems in Qiongdongnan Basin of the continental margin, the northern South China Sea were comprehensively analyzed by means of regional geology and sedimentary characteristics, history of hydrocarbon expulsion of source rocks, petroleum migration and conduction systems, configuration relationships between petroleum formation and traps, as well as the assemblages and modes of petroleum migration and accumulation. The petroleum system was divided into shallow water petroleum system in the northern depression, deep water petroleum system in the central depression and deep water petroleum system in the southern depression of Qiongdongnan Basin, and 13 petroleum sub-systems further. Because of the obvious difference between petroleum systems and petroleum sub-systems, the composition and characteristics of generation, migration and conduction, migration and accumulation sub-systems were analyzed. The results show that the generation sub-system is composed of Eocene mid-deep lacustrine facies and Oligocene coal series source rock kitchen; the migration and conduction sub-system consists of the pathway systems, including fault, fracture, continuous sand body, unconformity, mud diapir and gas chimney, and controls the main petroleum-bearing advantage region restrictively; the migration and accumulation sub-system is dominated by vertical and lateral migration pattern, and petroleum accumulation in the advantage area under the wonderful condition of trap and reservoir-caprock composition through the proximal or distal migration and accumulation of pathway systems.
Last Update: 2015-09-28