川南地区XX矿段煤层气解吸影响因素分析

Factors Affecting De- absorption of CBM in XX Mining Section, Southern Sichuan Basin

煤层气解吸能力的大小是决定煤层气井产能的直接因素。川南地区XX矿段正在实施煤层气试验工程,如何增强煤层气解吸能力,提高煤层气井产能是目前面临的主要问题。通过从煤层渗透性、煤储层压力、煤层气解吸压力、储层深度、地温等方面对煤层气解吸的影响因素进行初步分析,提出从储层改造和合理排采两方面提高煤层气解吸能力的构想。

A degree of de-absorption ability is a direct factor deciding the productivity of a coalbed methane(CBM) well. At present, XX mining section in Southern Sichuan Basin is implementing a CBM engineering project. How to increase de-absorption ability and productivity are the main problems. In this study, some factors affecting this de-absorption are analyzed in terms of permeability of coal bed, pressure of coal reservoir, de-absorption pressure of CBM, and depth and ground temperature of coal reservoir.Finally, one idea to enhance the de-absorption ability from two aspects of both reservoir reform and reasonable drainage-recovery is put forward.