GOLDSCHMIDT CONFERENCE TOULOUSE 1998 Mantle-derived methane homologue, carbon dioxide and helium in natural gases from Songliao Basin, China

Whether abiogenic (inorganic) actions can form petroleum and natural gas reservoirs has been a debatable problem for over a century in the academy circle. Gold (1979) proposed eep-earth gas hypo-thesis. Wang (1983, 1989, 1997) discussed the geochemical characteristics of deep-earth gas. Jenden et al. (1993) proposed three specific analytical criteria to identify mantle-derived hydrocarbons in oil and gas field. The isotopic composition characteristics of methane homologue, carbon dioxide and helium in natural gases from Songliao Basin, China will be discussed in this paper. Changde and Zhaoxi natural gas field The crucial reason why there was no important breakthrough in abiogenic hypothesis of natural ga