韩城矿区煤层压裂用活性水压裂液的优化及悬砂性能研究OA

The coal seam fracturing operations in the Hancheng mining area are characterized by a high clay content in the solid particles.During the hydraulic fracturing process,these clay particles are prone to expansion and migration when they come into contact with external fluids,which in turn affects the effectiveness of coalbed methane recovery.To address this issue,we have optimized the active hydraulic fracturing system by synthesizing a quaternary ammonium salt cationic polymer,specifically the epichlorohydrin-dimethylamine copolymer(ECH-DMA),which is commonly used in conventional oil and gas extraction.We then conducted indoor evaluation tests to assess the anti-swelling performance and sand suspension capabilities of the fracturing fluid using both the centrifuge method and the sand ratio method,respectively.The results demonstrated that the optimized fracturing fluid exhibited significantly improved water wash resistance and sand suspension performance.It effectively reduced the expansion and migration of clay particles and improved the ability to carry proppant into the coal seams,thereby enhancing the recovery efficiency of coalbed methane.