Characteristics of Natural Gas C<SUB>4~C₇ Fingerprint in the Western Sichuan Depression and Its Implications for Gas Reservoir Formation

详细信息   

• 责任者：Bao Dian (State Key Lab. of Oil and Gas Reservoirs Geology and Exploitation ; Chengdu University of Technology ; Chengdu 610059 ; China) ; Shen Zhongmin
• 刊名：Computing Techniques for Geophysical and Geochemical Exploration
• 出版年：2008
• 卷期：30(2)
• 关键词：天然气 ; natural gas ; 油气藏形成 ; reservoir formation ; 四川 ; Sichuan
• 页码：p.113-116
• 图表：5 illus., 2 tables, 15 refs.
• 分类号：1003
• issnNo：ISSN1001-1749
• isbnNo：CN51-1242/P

摘要

The patterns of C<SUB>4 ~ C₇ fingerprint hydrocarbons illustrate the similarity of the source-rock of the survey regions of Xinchang, Hexinchang and Xiaoquan in the western Sichuan Depression, and the organic matter of gas source rock is mainly of II 2 and III types based on systematic sampling and analysis of natural gas C₄~C₇ fingerprint hydrocarbons. Through analysis of the distribution of aromatic hydrocarbon contents in vertical profile, the authors argue that the long migration of natural gases as dissociative forms in Penglaizhen Formation, natural gas migration as mixed forms in Middle Jurassic formation and short migration to form gas reservoir in the upper trassic T₃⁴X and T₃²X of Xujiahe Formation.