• 责任者：Ni Yunyan (PetroChina Research Institute of Petroleum Exploration & Development ; Beijing 100083 ; China) ; Dai Jinxing
• 刊名：Petroleum Exploration and Development
• 出版年：2009
• 卷期：36(1)
• 关键词：无机成因气 ; abiogenic gases ; 松辽平原 ; Songliao Plain
• 页码：p.35-45
• 图表：5 illus., 7 tables, 48 refs.
• 分类号：1003
• issnNo：ISSN1000-0747
• isbnNo：CN11-2360/TE

Gases with different origins occur in the Xujiaweizi Fault Depression. Among them, the abiogenic gases have a typical carbon isotopic reversal trend (δ<SUP>13C₁>δ¹³C₂>δ¹³C₃>δ¹³C₄), the carbon isotope of methane is greater than-30‰, and the R/Ra greater than 0.5. Thus it is argued that the abiogenic gases in the Xujiaweizi Fault Depression can not simply be a result of two-source mixing. The mixing of coal-derived and oil-derived gases can not lead to the carbon isotopic reversal trend, which provides further evidence for the abiogenic origin of the deep-layer gas.