无机成因二氧化碳气的类型分布和成藏控制条件

Progress in the study of the types,distribution and reservoirs of CO 2 gas of inorganic origin

从无机成因天然气成藏主控条件———气源断裂体系构造变形场的类型（收缩、伸展、走滑和旋转等）出发，综合分析了无机成因二氧化碳气藏的成因类型、分布规律和成藏控制条件等。结合实例对气源断裂体系结构作了剖析，指出二氧化碳气藏研究中值得重视的几个方面。

According to their genetic environments,CO 2 gas reservoirs may fall into five structural genetic types,and each type may be further divided into several subtypes according to the concrete formation conditions.The global CO 2 of inorganic origin is just distributed in the structural belts of the five genetic types.The CO 2 gas generation,migration and accumulation and reservoir trapping,capping and preservation are strictly controlled by the gas source fault system.As a case study,some gas reservoirs in eastern China are analyzed.