Target Optimization Of Shale Gas Production Capacity In Longmaoxi Group, Weiyuan Area, Sichuan Basin

The shale gas exploration and development achieve a strategic breakthrough in Weiyuan Demonstration area of shale gas industry. But the shale formation is heterogeneous,the yield difference between wells, analysis of influence factors of productivity, Optimizing the shale gas core area of production capacity construction is an important task at present.Through the methods of core observation and description,old well review, analysis and testing, the paper analysised Longmaxi shale formation and reservoir characteristics. According to the marine shale gas reservoir classification and evaluation standard, it Comprehensively evaluated Longmaxi shale reservoir of in Weiyuan area, the Volume Method Based on Grid Integration is applicated in the Evaluation of Shale Gas Resource in the Weiyuan Area. The paper analysised the ground conditions in Weiyuan area, including terrain, river system, pipe network, city planning area, scenic area. Due to the impact of erosion, Longmaxi formation is more thick away from the area of denudation. Shale gas reservoir is high quality, high-quality shale gas reservoir thickness is20.14m～46.45m. Longmaxi Shale gas resource is4.8×101m3. The average abundance of resources is5.27×10m/km2and has an increasing trend away from the denudation area.Weiyuan area has a large range of hills, terrain conditions are favourable, water system development, water condition is good. except of city planning area, mining area, the ground work area is4311.65km. Gas transmission trunk line is mainly north-south, gas gathering trunk line is mainly west-east, network development. Through comparing and analysing the selected research status at home and abroad, six parameters as the evaluation parameters of shale gas productivity construction core area has been selected to established China Marine shale gas productivity construction core area, including buried depth, thickness, abundance of resources, pressure coefficient, ground stress, ground conditions. Using the comprehensive information superposition method and the optimization criteria, the paper optimized W2-W4well area as the Weiyuan region Longmaxi shale gas core area of building products. Build products area is1108.88km2. In the build products area, good show of oil and gas, oil testing and production situation demonstrated fine drilling efficiency, which verify the rationality of the constituency and effectively guide products construction of shale gas.