论文部分内容阅读
以川西地区须家河组为研究对象,通过天然气组分特征变化、δ13C1-Ro关系及稀有气体特征对须家河组各小层进行气源分析,认为,须二段天然气的主要气源是须二段烃源岩,其次是须一段烃源岩。须四段烃源岩是须四段的主要气源、须五段和须三段烃源岩为次要气源。在断裂发育地区,须四段部分来自自须二段烃源岩。
Taking Xujiahe Formation in western Sichuan as the research object, the gas source analysis of each layer of Xujiahe Formation was conducted through the variation of natural gas composition, δ13C1-Ro relationship and rare gas characteristics. It is concluded that the main source of natural gas in Xujiahe Formation is There are two source rocks, followed by a source rock. The source rocks of the 4th member of the Xujiahe Formation are the main gas source of the 4th member of the Xujiahe Member. The source rocks of the Xu 5 Member and the Xu 3 Member have the secondary source of gas. In the area of fault development, part of the four segments should come from the source rocks of the Second Autonomous Region.