| Based on the research of the deep of Huainan Panji mining area’s stratigraphical features,structural evolution,hydro geological conditions and physical property of reservoir this thesis analyzed the background of gas reservoir’s formation from coalbed methane cap’s feature,this thesis selected six elements to work as the norm of evolution.The coalbed methane evolution’s modeling and model-level analysis method is used to decide the weight of each element.The geological are block method and statistical method is used to decide each element’s membership function.At last,the thesis connected the FCE and GIS spatial overlay to make overall evaluation of Panji’s deep 13-1 coalbed methane.It can be concluded from the research,most of the research are 13-1’s seam thickness is greater than 3.5 meters.The texture of coal seam is mainly vitrinite.Ash in the seam are 29.04%and 38.31%.The mercury fissures is between 3.07/cm3-4.48g/cm3.The seam roof is mudstone.The roof hithologic character mainly contains gray mudstone and dark grey mudstone,part of it conditions siltstone and thin layer of fine sandstone.The thickness is between 4.35m-12.80m,average thickness is 8.18m.In a conclution,it contains good conditions for coalbed methane’s generating conditions and storage conditions.Based on the connection of volume method and grid method,the thesis used GIS to analyze research area’s reserves.Calculations show that,the reserves of 13-1 research area is 205.6 × 108 m3,the area with rich source contains gas more than 14m3/t.On the flat of GIS,to determine the degree of membership of each factor,the thesis also used FCE to calculate the research area’s comprehensive evaluation the research area’s comprehensive evaluation value.Through the calculation,it can be received that the chart of favorable area which could show the most favorable zone for exploration is the northeast region of research area.This area has good condition for gas generation,gas reservoir and economic development value. |
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