Characteristics of Primary and Secondary Gas Pool and Transportation Mechanism in Western Sichuan Depression
详细信息
- 责任者：Shen Zhongmin (State Key Lab of Oil-Gas Reservoirs Geology and Exploitation ; Chengdu University of Technology ; Chengdu 610059 ; China) ; Zhang Yong
- 刊名：Journal of Mineralogy and Petrology
- 出版年：2011
- 卷期：31(1)
- 关键词：油气运移 ; oil and gas migration ; 油气聚集 ; oil and gas accumulation ; 四川 ; Sichuan Province
- 页码：p.83-88
- 图表：6 illus., 1 table, 20 refs.
- 分类号：1003
- issnNo：ISSN1001-6872
- isbnNo：CN51-1143/TD
摘要
Hydrocarbon gas components, CO2, N2 contents and drying coefficients are good indicators of gas migration and geochemistry, which shows the longitudinal variation of vertical gas migration characteristics. One thousand geochemical parameters from West Sichuan Depression was collected and analyzed systematically so as to investigate the characteristics of primary and second gas and transport mechanism. Formation pressure and the tectonic stress field are thought to be the main driving force for the gas migration in West Sichuan Depression. The migration of the secondary gas reservoir of Jurassic is different from that of the original gas pools of Triassic. Natural gas in the Upper Jurassic came from the underlying Xujiahe Formation with the faults as the main transporting channels. Part of Middle Jurassic gas reservoir from the Xujiahe gas source came along the high-speed migration path and some of the lower reservoir formed through a water-soluble phase gas source to the way migration-accumulation.
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址：北京市海淀区学院路29号 邮编：100083 电话：办公室：(+86 10)66554848；文献借阅、咨询服务、科技查新：66554700 |