Research progress of control mechanism of coal petrology on CBM production

in order to provide the theoreical references for high eficient calbed methane( CBM) exploration and development.the systematic analysis was made on the curen situation and existing problems of coal petrology control mechanism on CBM producion and CBM development geologcal theory.The paper poined ou tat there were signficant diferences on the petrological comp.stion and constituive relation of coalresevois. So farthe research about the storage- permeable spas characteristics of coal reservoirs and iscoupling relationship with CBM producion which were dominated by coal petrology was far rom reachingthe techmnolog requirements of CBM development.The spec fc perfomance as the following insuificent understanding of the heterogeneity of coal reservoir development characteristics and development dynamic effect ack of perinencefor reservoir reformation and CBMl drainage t could not avoid the various layersi iner contradiction fron the geocgcal aspects during CBM production. Clarifying the storage- permeable spaces characteristics controlled by cal petrogy.the constitivereation varation in intemal finterlayer.and the reservoir physical propertes response in ClM exploring process have become scietifi: problems and are urget to be explored .Tthe adapted dectptivist theory and method of coal petrology in layer-interiayer,macroscopic-microcosmic and inttal- dynamic will be the future research diection