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为了指导煤层气目标区优选和勘探开发,厘清褶皱构造控制的煤层气藏富集规律。通过对褶皱中和面上下煤岩层的应力与应变特征的研究,结合煤层气成藏机制,系统分析了褶皱中和面上下煤层气藏储层应力性质、渗透率、气藏边界和盖层条件,得出了褶皱中和面上下煤层背斜与向斜煤层气藏的赋存规律。将褶皱构造控制的煤层气藏划分为向斜上层聚集低渗型、向斜下层高渗运移型、背斜上层逸散型和背斜下层富集型4种类型,并引用相应类型实例进行了验证。
In order to guide the optimization and exploration and development of target area of coalbed methane, the rule of enrichment of coalbed methane reservoirs controlled by fold structure is clarified. Based on the study of the stress and strain characteristics of upper and lower coal beds in the neutralization plane and the mechanism of coal-bed gas accumulation, the stress properties, permeability, gas reservoir boundary and caprock conditions of the upper and lower coalbed methane reservoirs are systematically analyzed. , We got the occurrence regularity of anticline and synclinal coalbed gas reservoirs in the middle and lower fold fold surface. The coalbed methane reservoirs controlled by fold structure are divided into four types, ie, low-permeability syncline in the upper syncline, high-permeability shift in the lower syncline, upper escaping anticline and lower ancillary anticline, and reference is made to the corresponding examples Verified.