Budget Of Coal-bed Methane Resources And Favorable Block Prediction In Huainan Mining Area

The huainan mining area as the research area, by collecting various mineral phase of main coal seam,coal field geological data, borehole data of gas and coalbed methane evaluation data in this paper, analyze of the coalbed methane adsorption,desorption characteristics of the coal seam group comprehensively, coalbed gas composition characteristics, the air content change and distribution characteristics in the study area. Selected the coalbed methane resources/geological reserves parameters, according to the formula of volume method, combining with the programming software to calculate the gas compressibility factor, the coalbed methane resources in the primary working bed is calculated. Through the establishment of high permeability zone of coalbed methane enrichment selection method system and the principle. Evaluating separately out of the coalbed methane exploration target zone in the study area with the factors superposition method and the enrichment hypertonic factor fuzzy matter-element evaluation method,comparative analysis summarizes the favorable exploration target area system of evaluation method.Coalbed methane resource of 43.577 billion m3 in this calculation,from the resources abundance, the coal bed methane resource abundance for an average of 191 million m3/km2 in the study area,among them:the coal bed methane resource abundance an average of 207 million m3/km2 in Pansan mining, the coalbed methane resource abundance an average of 192 million m3 /km2 in Dingji mining, the CBM resources average abundance of 209 million m3/km2 in Guqiao coal mine, the CBM resources abundance an average of 125 million m3/km2 in Zhangji mining.Overall, to the coalbed methane resource of meteorological in Huainan mining, the south is high, the north is low and the east is high,the west is low, focused on the block deep area of the south. From the point of resource, coalbed methane resource mainly distributed in Guqiao block and Dingji block, followed by Pansan and Dingji block; From the point of vertical distribution,8, 11-2 deep depth of coal bed and 13-1 CBM resource enrichness significantly better than the 5,6,7 # coal bed, the coalbed methane resources in shallow 1 and 4 coal bed is relatively larger. The result of the two different methods of coalbed methane enrichment of favorable area distribution has certain differences, grade differences because each other’s index of different, error evaluation and method itself, but the two kinds of evaluation methods of evaluation result is reliable and feasible. Overall performance in individual coal seam coal (such as 6 and 1) the distribution of coalbed methane of high permeability zone of differences, but the overall trend, mainly distributed in areas favorable for coalbed methane enrichment hypertonic three, set the block and pan Gu Qiao block.