煤层气吸附-解吸规律研究进展
发布时间：2018-10-10 06:19
【摘要】：调研了煤层气吸附理论与实验、水对煤层气吸附-解吸过程的影响与煤层气液-固吸附理论体系等3方面的研究进展,总结了气相吸附理论在煤层气吸附研究中取得的成果以及水对煤层气吸附的影响作用,分析了气相吸附理论在解释煤层气吸附状态时存在的问题,介绍了最新的液相吸附理论及在此基础上的煤层气复合解吸理论。不同相态的水对煤层气的吸附作用不同,煤样含水饱和度较低时,气相的平衡水可以显著降低煤层气的吸附量;当含水饱和度达到一定临界值时,含水量对煤层气吸附量变化的影响不大;而煤样中含水进一步增大时,注水煤样中液相水可以增加煤层气的吸附量煤层气的赋存状态与气相吸附规律并不相符,而煤层气的液相吸附理论可以同时解决煤岩在水环境下生烃的条件及气相吸附没有临界解吸压力的问题;在液相吸附的条件下,煤层气的解吸过程是由气相及液相解吸共同控制的复合解吸过程。
[Abstract]:The theory and experiment of coalbed methane adsorption, the influence of water on the process of adsorption-desorption of coalbed methane and the theoretical system of liquid-solid adsorption of coalbed methane were investigated. This paper summarizes the achievements of gas adsorption theory in the study of coalbed methane adsorption and the effect of water on the adsorption of coalbed methane, and analyzes the problems of gas phase adsorption theory in explaining the adsorption state of coalbed methane. The latest liquid adsorption theory and the coal bed methane complex desorption theory are introduced. When the water saturation of coal sample is low, the equilibrium water of gas phase can significantly reduce the adsorption capacity of coal bed methane, and when the water saturation reaches a certain critical value, The moisture content has little effect on the adsorption capacity of coal bed methane, but when the water content in coal sample increases further, the water in liquid phase of injected coal sample can increase the adsorption capacity of coal bed methane, and the occurrence state of coal bed methane does not accord with the law of gas phase adsorption. The liquid adsorption theory of coalbed methane can solve the problem of hydrocarbon generation and gas phase adsorption without critical desorption pressure at the same time. The desorption process of coalbed methane is a complex desorption process controlled by gas phase and liquid phase desorption.
【作者单位】： 西南石油大学"油气藏地质及开发工程"国家重点实验室;
【基金】：国家自然科学基金(51474179) 国家科技重大专项(2016ZX05066004-001)
【分类号】：TE37
，
本文编号：2260959
[Abstract]:The theory and experiment of coalbed methane adsorption, the influence of water on the process of adsorption-desorption of coalbed methane and the theoretical system of liquid-solid adsorption of coalbed methane were investigated. This paper summarizes the achievements of gas adsorption theory in the study of coalbed methane adsorption and the effect of water on the adsorption of coalbed methane, and analyzes the problems of gas phase adsorption theory in explaining the adsorption state of coalbed methane. The latest liquid adsorption theory and the coal bed methane complex desorption theory are introduced. When the water saturation of coal sample is low, the equilibrium water of gas phase can significantly reduce the adsorption capacity of coal bed methane, and when the water saturation reaches a certain critical value, The moisture content has little effect on the adsorption capacity of coal bed methane, but when the water content in coal sample increases further, the water in liquid phase of injected coal sample can increase the adsorption capacity of coal bed methane, and the occurrence state of coal bed methane does not accord with the law of gas phase adsorption. The liquid adsorption theory of coalbed methane can solve the problem of hydrocarbon generation and gas phase adsorption without critical desorption pressure at the same time. The desorption process of coalbed methane is a complex desorption process controlled by gas phase and liquid phase desorption.
【作者单位】： 西南石油大学"油气藏地质及开发工程"国家重点实验室;
【基金】：国家自然科学基金(51474179) 国家科技重大专项(2016ZX05066004-001)
【分类号】：TE37
，
本文编号：2260959
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