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松辽盆地自 1994年发现肇州西和昌德两个无机烷烃气藏以来 ,近几年生产实践中又发现了一批无机成因烷烃气和幔源CO2 气井 ,对老井资料复查也发现一些井中有无机成因烷烃气的存在 ,使松辽盆地无机成因烷烃气的分布有所扩大。在松辽盆地的气藏中无机成因烷烃气、幔源CO2 气与生物成因的烷烃气、CO2 气的组合模型有以下几种 :纯无机成因烷烃气藏、纯幔源CO2 气藏、无机成因烷烃气与幔源CO2 气的混合气藏、无机成因烷烃气与有机成因CO2 气的混合气藏、下部为无机成因烷烃气上部为有机成因烷烃气的叠合气藏等五种。证明松辽盆地存在着无机成因与有机成因烷烃气与CO2 气 ,并且具有商业价值。
Since the discovery of two inorganic alkanes in West Zhaohe and Changde in Songliao Basin in 1994, a number of inorganic-derived alkane gas and mantle-derived CO2 gas wells have also been found in production practice in recent years. The presence of inorganic-formed alkane gas in the well has widened the distribution of inorganic-derived alkane gas in the Songliao Basin. In the gas reservoirs of Songliao Basin, the combination models of inorganic hydrocarbon gas, mantle carbon dioxide gas and biogenic alkane gas and CO2 gas are as follows: pure inorganic genesis alkane gas reservoir, pure mantle source CO2 gas reservoir, inorganic genesis A mixed gas reservoir of alkane gas and mantle source CO2 gas, a mixed gas reservoir of inorganic genesis hydrocarbon gas and organic genesis CO2 gas, and a lower gas reservoir of organic genesis alkane gas in the lower part. It is proved that the Songliao Basin has inorganic and organic origin of alkane gas and CO2 gas and has commercial value.