煤储层瓦斯激励开采技术及其适应性

由于煤储层瓦斯特性、流动机理等与常规天然气藏有很大的差异，形成了有效的造穴，水力压裂，注气和物理场激励等四种煤储层瓦斯激励开采技术。造穴技术适应于内生裂隙发育的中变质阶段煤；水力压裂适用于相对坚硬的裂缝性煤储层；CO2注气开采，效果明显，但气源和经济性使其应用范围十分有限；外加交变磁场、声场等物理场激励促进煤层瓦斯解吸、流动，还需要大量的室内和室外研究工作。

THE ADAPTABILITY STUDY AND TECHNOLOGIES OF PROMPTING EXPLOITATION IN COAL-BED METHANE SEAMS

According to the differeces between characteristics of conventional natural gas reservoir and characteristics of coal-bed gas seams, formed four kind of effective technologies of prompting exploitation: open-hole cavity completion, gas injection, hydraulic fracture, prompting exploitation of physical field. The open-hole cavity completion is suitable for the middle metamorphic coal of endogenesis fracture growth, the hydraulic fracture applies the better hard fracture of coal-bed gas seams. the exploitation of gas injection is effective, but the shortage of the fountain of gas in many coal seams makes the appliance seldom, the accelerating desorption and flow of coal to gas in the extra alternating electric field or sound field needs a lot of experimentations and investigations in lab.