Large-Scale Multi-Stage Hydraulic Fracturing Technology for Shale Gas Horizontal Well JY1HF

In order to obtain commercial shale gas from Well JY1HF,the first marine shale gas horizontal well in Fuling Area,multi-stage fracturing design and process optimization for this well were carried out.By learning from successful stimulation experience in North American marine shale gas play,pre-frac evaluation of this well was performed using core data,log data and rock mechanics data.Through rock mechanics test,X ray diffraction test,induced stress field calculation and volume fracturing dynamic simulation,research on fracturing stages,fracturing fluid,proppant,perforating and fracturing technology optimization had been developed.A set of large hydraulic fracturing scheme of combination of proppant,hybrid fracturing,integrated pumping easy-drillable bridge plug and perforating was proposed.15 stages were fractured in Well JY1HF,the cumulative injection fluid volume was 19 972.3 m3,the cumulative injection proppant volume was 968.82 m3 and absolute open flow was 16.7×104 m3/d.The results showed that the multi-stage hybrid fracturing could reach large effective stimulated reservoir volume in Longmaxi marine shale horizontal wells.Successful fracturing of Well JY1HF will provide valuable experience for China marine shale gas fracturing.