Research on Hydraulic Fracturing and Permeability Enhancement Technology for Ground Gas Extraction Wells in Gucheng Coal Mine
Based on the engineering background of using surface gas extraction wells to extract gas from the No.3 coal seam of Gucheng Coal Mine,combined with theoretical analysis,laboratory experiments,industrial tests and other methods,basic research on the application of surface drilling hydraulic fracturing coal seam anti permeability technology was carried out in the S2303 comprehensive mining face.Reasonable types and ratios of fracturing fluid and proppants were selected,and specific fracturing processes and construction procedures were designed.After fracturing,the anti permeability effect and influence radius were investigated by drilling along the layer.The results show that within the influence range of the fracturing well,the mixed flow rate of drilling and extraction along the layer significantly increases,improving the permeability of the coal seam.The maximum influence range can reach 100 meters.The research results have guiding significance for solving the gas control problem in low-permeability coal seams.
ground gas extraction wellhydraulic fracturinglayered drilling
NETL
NSTL
万方数据
