The advance of coalbed methane geology

The breakthrough advance of coalbed methane(CBM)exploration has been gained in last 10 years in China,the large amount CBM reserve is obtained in Qinshui Basin,the southeastern Shanxi,and the great advance of CBM exploration is got in Hedong coalfield,the southwestern Shanxi.The great advance of CBM geology is got in the standards and the technique of selecting exploration districts.They are as follows:(a) the break advance of the petrophysics of coal reservoirs;(b) the CBM flows,gas reservoirs,inrichment,preserving and production,the concept of CBM pool is accepted and several types of CBM pool are recognized according to the geological conditions of China;(c) the trap and preserving are very important for the economic CBM pool,and the consideration that the CBM occurrence only in coal seams is changed,the defusing and flow of CBM from the CBM pool are very important for the CBM preserving;(d) the economic CBM pool is discovered from high rank coal seams in China;(e) the low rank coals (brown coal and high bituminous coal) are of great potential for the CBM exploration;(f) the heterogeneity of CBM pool is recognized deeply.