Low Step Coal-seam Gas Resources in Zhunger Basin and Exploration Potential Analysis

This paper analyzes the distribution of coal-seam gas resources and its exploration and development both home and abroad,and researches genesis and accumulation of coal-seam gas.In combining with the geologic distribution and evolution features of coalbeds in the Lower-Middle Jurassic in this basin, it is pointed out that coalbeds in the Badaowan and Xishanyao Formations are hi ghly developed at the south end of this basin.Gas concentration is large though their evolution is in a low step stage.Simulation experiment of coal rock als o verified that they have strong gas generating capacity.Favorable coal-seam gas accumu-lating areas are predicted with reference to the successful experien ces of American in development of low step coal-seam gas.It is believed that the Xishanyao Formation in Jurassic is the most favorable strata series and the south-east is the most favorable area for exploration.