Primary migration and secondary alteration of the Upper Paleozoic gas reservoir in Ordos Basin, China - Application of fluid inclusion gases

被引:10
作者
Gong Se [1 ,2 ]
Peng PingAn [1 ]
Shuai YanHua [3 ]
Dai JinXing [3 ]
Zhang WenZheng [4 ]
机构
[1] Chinese Acad Sci, Guangzhou Inst Geochem, Guangzhou 510640, Peoples R China
[2] Common Wealth Sci & Res Org, Petr Resources, N Ryde, NSW 1670, Australia
[3] PetroChina, Res Inst Petr Explorat & Dev, Beijing 100083, Peoples R China
[4] Changqing Petr Corp, Res Inst Explorat & Dev, Xian 710021, Peoples R China
来源
SCIENCE IN CHINA SERIES D-EARTH SCIENCES | 2008年 / 51卷 / Suppl 1期
关键词
secondary alteration; fluid inclusion; carbon isotope; Ordos Basin;
D O I
10.1007/s11430-008-5018-9
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
The composition of fluid inclusions (FI) often represents the initial geochemical characteristics of palaeo-fluid in reservoir rock. Influence on composition and carbon isotopic composition of gas during primary migration, reservoir-forming and subsequent secondary alterations are discussed through comparing fluid inclusion gas with coal-formed gas and natural gas in present gas reservoirs in the Ordos Basin. The results show that primary migration of gas has significant effect on the molecular but not on the carbon isotopic composition of methane. Migration and diffusion fractionation took place during the secondary migration of gas in Upper Paleozoic gas reservoir according to carbon isotopic composition of methane in Fls. Composition and carbon isotopic composition of natural gas were nearly unchanged after the gas reservoir forming through comparing the FI gases with the natural gas in present gas reservoir.
引用
收藏
页码:165 / 173
页数:9
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