Analogy analysis of CBM reservoir-forming conditions and potential assessment of coalbed methane in Hegang basin

In order to evaluate the resources potential of coalbed methane in Hegang basin, this paper analyzes the formation condition of the coal bed, an analogy has been made between the geological and geochemical parameters in Hegang basin and those in Fuxin basin, the paper also grades the resources potential of CBM in two basins and calculates the resources extents of Hegang basin. According to the evaluation results, most of the geological and geochemical parameters are similar to those of Fuxin basin, some of them are even better. Hegang basin is rich in coal resource, and most are medium and low coal ranks. The average coal thickness is 64 m, provides a good condition for the formation of CBM. As the magmatic activities, tectonic movement and the effectiveness of the cover vary in different mining area, the gas content in northeast areas is higher than that in southwest areas. although the gas content and permeability are low in some mining areas, the distribution area of the coal bed is large and most of the coal is in medial rank, CBM reserves is 445.6×10⁸ m³ which can create large industrial production by rational exploitation.