��������޻���������ģʽ

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，对老井资料复查地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。在松辽分轩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。

Abiogenic Gas Reservoic Modes Found in Songliao Basin

??In Songliao Basin,since the two abiogenic alkane gas reservoirs were discovered respectively at West Zhaozhou and Changde in 1994,in recent years a lot of wells producing abiogenic alkane gas and mantle source carbon dioxide gas have been found in practice and through reexamining old well's data it was found that there was the abiogenic alkane gas in some of these wells,so as to cause the distribution scope of the abiogenic alkane gas to be enlarged in Songliao Basin.There are five combination modes of the abiogenic alkane gas and mantle source carbon dioxide gas with the biogenic alkane gas and carbon dioxide gas in Songliao Basin,i.e.pure abiogenic alkane gas reservoirs;pure mantle source carbon dioxide gas reservoirs;mixed abiogenic alkane gas-mantle source carbon dioxide gas reservoir;mixed abiogenic alkane gas-biogenic carbon dioxide gas reservoirs;and superposed gas reservoirs being of the abiogenic alkane gas at the bottom and of the biogenic alkane gas at the top.It is proved that the abiogenic and biogenic alkane gas and carbon dioxide gas exist together in Songliao Basin and are possessed of commercial values.