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煤储层是一种具有相当弹性的地质体,其对应力的响应比常规储层更为敏感．煤层气成藏的诸多外部地质动力学因素作用于煤储层本身,体现为煤储层允许煤层气扩散渗流或导流的能力．因此,煤储层中天然裂隙的发育特征就成为决定煤层气能否成藏的一个关键要素．基于这一关系,有针对性地设计了综合物理模拟方法,从固流耦合的角度对不同煤级煤基块的弹性力学性质开展研究,建立起煤储层在有效应力——吸附-解吸条件下产生弹性体积变形(弹性自调节效应)的模式,获得了对其弹性变形特征规律性的认识．在此基础上,提出了高煤级煤层气成藏“弹性自封闭效应”的新观点,为进一步探讨其动力学因素、可能机理、在煤层气能量平衡系统中的作用等提供了切入点和科学依据．
The coal reservoir is a geologically very elastic body that is more responsive to stress than conventional reservoirs. Many external geodynamic factors of CBM accumulation act on the coal reservoir itself, showing the ability of coal reservoirs to allow diffusion and seepage of CBM. Therefore, the developmental features of natural fractures in coal reservoirs have become a key factor in determining whether CBM can accumulate. Based on this relationship, a comprehensive physical simulation method is designed in a targeted way. From the perspective of solid-fluid coupling, the elastic mechanics properties of coal base blocks with different coal rank are studied, and the conditions of effective stress-sorption-desorption Under elastic deformation (elastic self-adjusting effect) mode, obtained its understanding of the regularity of elastic deformation characteristics. On this basis, a new viewpoint of “elastic self-sealing effect” of high-rank coalbed gas accumulation is proposed, which provides a starting point for further discussion of its kinetic factors, possible mechanisms and its role in the CBM energy balance system Scientific basis.