关键词: 沁水煤田东北部, 15号煤储层, 煤储层物性及特征

Abstract: Based on the development data of coalbed methane in northeastern Qinshui coalfield,the physical properties and characteristics of No.15 coal reservoir in the study area were analyzed using the theory of coalbed methane geology and mathematical statistics.The results show that the stable and recoverable coal seam provides good reservoir conditions for the development of coalbed methane. The high rank and difference of coal make different components of coal. The high gas content provides good gas source for the development of coal-bed methane. The negative pressure of coal reservoir, getting the coalbed methane positive adsorption pressure, driving weak motion of the coalbed methane output and having low gas saturation, is not conducive to keep coal bed methane wells high and stable production;The porosity of coal is not so bad but it’s connectivity is poor. The highly-developed transition hole provides a favorable space for coalbed methane storage. Ahthough the small - micro fractures are highly developed but fully filled with coal fines, the permeability of coal seam is low;The adsorption time is longer than usual coal seam, which is unfavorable to the high yield of coalbed gas wells and the short development cycle of coal bed methane.