Analysis on coal-bed methane development based on coal measure gas in China and its countermeasure

For further improvement of the degree of coal-bed methane (CBM) exploration and development and accel- erating the development of CBM industry,the present situation and existing problems of CBM exploration and develop- ment are analyzed in detail in this paper. It is potential for prospecting and exploitation that the CBM resources of which burial depth deeper than 1 200 m are abundant and commonly with tight sandstone gas composite symbiosis in China. According to the development features of CBM and coal measures sandstone gas,there are two types of the gas reservoir models,the one,gas self-generated and self-stored in reservoir,the other,gas internally generated but exter- nally stored in reservoir. As a result,the coal seams and sandstone intervals should be unified as target layers integrat- ed studied,then,the CBM exploration area in vertical direction will be expanded,the resource abundance can be in- creased,and the reservoir stimulation effect is much better than fractured in only coal seams. Such suggests as explo- ring and developing these complex natural gas in deep coal measure strata for promoting the development of CBM in- dustry are finally presented.