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文 33-2 0 4气藏是一个 CO2 含量极高的天然气藏 ,其 CO2 含量高达 89.2 8%。通过天然气化学组分、气源类型等资料的对比分析 ,研究该区气藏的形成条件、构造发育与油气聚集的关系 ;应用重力分异作用、CO2 和烃气在油、水中的溶解度差异特征等 ,分析文 33-2 0 4CO2 气藏的成因 ,认为 :该气藏中气和第三系生成的天然气有重大差别 ,其与下伏煤成气有直接的亲缘关系 ,气藏属煤成气藏。文 33-2 0 4CO2 气藏的发现 ,证明文南地区还存在另一气源 ,即 C— P系煤成气源 ,为天然气勘探提供了一个新领域。
Text 33-2 0 4 Gas reservoir is a natural gas reservoir with very high CO2 content with a CO2 content of 89.28%. Through the comparative analysis of natural gas chemical composition and gas source types, the formation conditions of gas reservoirs and the relationship between tectonic development and hydrocarbon accumulation are studied. By means of gravitational differentiation, the difference of solubility of CO2 and hydrocarbon gas in oil and water And so on. Analyzes the genesis of the Wencheng gas reservoir, and thinks that there is a significant difference between the gas produced in the gas reservoir and that of the Tertiary, which is directly related to the underlying coal gas. The gas reservoir is coal Gas reservoir. The discovery of the 4CO2 gas reservoir shows that there is another source of gas in the Wennan region, namely, the C-P system, which provides a new source of gas exploration.