JY1HF页岩气水平井大型分段压裂技术

JY1HF井是涪陵地区第一口海相页岩气水平井，为了获得商业性页岩气产量，对JY1HF水平井进行了分段压裂设计和工艺优化。在借鉴北美海相页岩气压裂经验的基础上，通过该井岩心资料、测井、岩石力学等数据，对龙马溪组页岩储层进行了压前评价。采用岩石力学试验、X衍射试验、诱导应力场计算和体积压裂动态模拟等方法，开展了压裂段数、压裂液、支撑剂、射孔方案和压裂工艺优化等综合研究，提出采用组合加砂、混合压裂工艺，泵送易钻桥塞射孔联作工艺进行大型水力压裂改造的方案。JY1HF井共压裂15段，累计注入液量19 972.3 m3，支撑剂968.82 m3，放喷测试获得无阻流量16.7×104 m3/d的高产页岩气流。结果表明，龙马溪组海相页岩采用水平井大型分段压裂技术，可获得较大的有效改造体积。JY1HF井的成功压裂为中国海相页岩气压裂改造积累了经验。 

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.