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从CO2 分布特征入手 ,利用其天然气碳同位素图版分析了松辽盆地南部CO2 成因类型 ;利用CO2 百分含量及地层水HCO-3 含量在平面上的变化 ,指明了孤店地区气源方向及CO2 成因类型为无机成因碳酸盐矿物分解或与粘土反应而成 ;建立了孤店油气田侧向运移上生、下储的成藏模式及万金塔气藏垂向运移下生、上储的成藏模式。通过评价工作 ,找出了松辽盆地南部CO2 平面分布规律及富集条件。
Starting from the characteristics of CO2 distribution, the carbon isotope pattern of natural gas was used to analyze the type of CO2 genesis in the southern Songliao Basin. Using the change of CO2 percentage and HCO-3 content in the water layer, the gas source direction and CO2 The genetic type is that inorganic carbonate mineral decomposes or reacts with clay, and the accumulation model of lateral migration of upper and lower reservoirs in Guodian oil and gas field and vertical migration of upper and lower reservoirs Accumulation model. Through the evaluation, the distribution and enrichment conditions of CO2 in southern Songliao Basin were found out.