Geological and Geochemical Evidence on the Identification of Natural Gas Migration Through Fault System, Baiyun Sag, Pearl River Mouth Basin, China

详细信息   

• 责任者：Hou Dujie (School of Energy Resources ; Chinese University of Geosciences(Beijing) ; Beijing 100083 ; China) ; Pang Xiong
• 刊名：Earth Science Frontiers
• 出版年：2008
• 卷期：15(4)
• 关键词：油气运移 ; migration of petroleum ; 南海 ; South China Sea
• 页码：p.81-87
• 图表：10 illus., 12 refs.
• 分类号：1003
• issnNo：ISSN1005-2321
• isbnNo：CN11-3370/P

摘要

The origin of natural gas has been analyzed based on the regional geological characteristics of Baiyun sag and carbon isotopic composition of methane and ethane. The results show that the natural gas is mainly derived from type II-III organic matter. The analysis of fault activity near slope shows that the four zones can be classified based on the fault activity intent with geological time. As the fault activity is intense, more peaks of homogenization temperature were recorded as the fluid activity appeared. These evidences prove that the fault mainly controls the migration and distribution of gas vertically.