School of Energy Resources,China University of Geosciences(Beijing)

煤储层孔-裂隙是煤层气吸附、运移和赋存的重要空间,其非均质性对煤层气勘探选区和合理开发具有重要意义。从煤储层孔-裂隙分类方法、定量表征技术、非均质性分布规律以及地质控制因素等方面进行分析,总结了国内外煤储层孔-裂隙非均质性及地质控制研究的最新进展。研究结果表明:孔-裂隙的分类方案具有多样性,但以尺度和机理分类为主,尺度与机理结合的分类方法深化了对煤层气赋存和运移机理的理解,孔-裂隙非均质性的表征技术呈现精细化、定量化和超微观化特征,结合其他学科综合分析,是国际上煤储层孔-裂隙研究方法的重要发展趋势;煤储层孔-裂隙非均质性主要受控于煤变质作用、沉积环境、构造演化、岩浆活动及其相互的叠合作用。综合多种常规与非常规表征技术对煤储层孔-裂隙非均质性进行系统化、精细化、超微观化的定量表征,并探寻煤储层孔-裂隙非均质性的地质成因规律,将是今后该研究领域的发展趋势。

The pore-crack of the coal reservoir was an important space of the coalbed methane adsorption,migration and enrichment and the heterogeneity would hav e important significances to the coalbed methane exploration zone selected and the rational development. From the coal reservoir pore-crack classification method,quantita tive characterization technology,heterogeneity distribution law,geological control factor and other aspects,the paper analyzed and summarized the new progress of the coal reservoir pore-crack heterogeneity and geological control study at home and abroad. The study results showed that the pore-crack classification plan would have diversity,b ut mainly based on the dimension and mechanism classification,a dimension and mechanism combined classification method deepened the understanding of the coalbed m ethane storage and migration.The pore-crack heterogeneity characterization technology would have refined,quantitative and ultra-micro features,and would be an important development tendency of the coal reservoir pore-crack study method in the world in combination with other subject comprehensive analysis.The coal reservoir pore-crack h eterogeneity was mainly controlled by the coal metamorphism role, sedimentary environment,tectonic evolution,magmatic activity and other mutual superposition role. The s ynthesized multi normal and abnormal characterization technologies were applied to the systematic,refined and ultra micro quantitative characterization on the coal reservo ir pore- crack heterogeneity. The geological formation law of the coal reservoir pore- crack heterogeneity was searched and would be a development tendency of the late st udy area.

国家科技重大专项资助项目(2011ZX05034-001)；国家自然科学基金资助项目(U1262104)；