深煤层煤层气开发有效途径展望

Proposed Effective Developing Method for the Deep Coalbed Methane

我国深煤层煤层气资源量巨大，埋深在1000～2000m的煤层气资源量占2000m以浅资源总量的61％。由于深煤层所具有的“高温、高地应力、高孔隙压力、低渗透率”特殊的地质条件和储层物性，与浅煤层相比，深煤层储层物性特征较差，目前我国煤层气开发主要集中在浅部，随着勘探工作的不断深入，对深部的勘探已大势所趋。但仍缺乏系统的研究成果；与浅煤层相比，特殊的地质条件使得适用于浅煤层煤层气的开发技术不能直接应用于深煤层煤层气开发。鉴于深煤层储层的独特特点，注CO2提高采收率增产技术、煤层气与煤系地层砂岩气共采技术将是提高深煤层煤层气井产气能力的有效途径。

It is abundant that the coalbed methane resource in the deep in China. Because of the bad reservoir properties caused by the geological factors, the eoalbed methane resource in the deep coal seams has been de- velopod scarcely. Along with the coalbed methane industry developing rapidly, the coalbed methane resource in the deep coal seams will be developed in the measured future. Compared with the low coal reservoir, the deep coal reservoir properties are less learned, and there are will no appropriate developing techniques which can be used for the deep coal reservoir. According to the special feature of deep coal reservoir, perhaps the stimulation technique by injecting CO2 to improve coalbed methane recovery and the simultaneous developing technique for the coalbed methane and the coal-derived gas in the sandstones in the coal measure strata can be effective methods for the deep coalbed methane.