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煤层作为煤层气储层,具有容纳气体以及允许气体流动的功能。中国的煤层气与其他国家有很大差别,由于成煤时间早,构造期次多,地质条件复杂,导致煤层气储层具有低含气饱和度、低渗透率以及低压力的特性。目前我国的煤层气开采主要以具有强烈非均质性的中、高阶煤为主,这些都导致了煤层气的勘探开采的难度较大。本文总结了我国煤层气储层的基本特点,分析了煤层气储层的研究现状,包括近年来煤层气储层研究取得的成效,以及煤层气储层研究难点及存在的问题,并针对中国煤层气开发技术研究提出了一些看法和建议。
The coal seam, as a CBM reservoir, has the function of containing gas and allowing gas flow. CBM in China is very different from other countries. Due to the early coal formation, many structural periods and complicated geological conditions, coalbed methane reservoirs have the characteristics of low gas saturation, low permeability and low pressure. At present, the exploitation of CBM in our country is mainly dominated by medium and high-rank coal with strong heterogeneity, all of which make exploration and exploitation of CBM more difficult. This paper summarizes the basic characteristics of coalbed methane reservoirs in China, analyzes the research status of CBM reservoirs, including the achievements in CBM reservoirs in recent years, as well as the research difficulties and existing problems in CBM reservoirs. Gas development technology research made some observations and suggestions.