页岩气藏储层压裂实验评价关键技术

页岩气藏勘探开发潜力巨大，因其基质具有超低渗透特点，使得开发过程中需要进行大规模水力压裂，裂缝网络是获得工业性气流的关键。页岩气井的缝网压裂设计有别于常规低渗透砂岩储层压裂设计，特殊的室内实验评价技术是缝网压裂设计的重中之重。为此，从常规的压裂实验评价入手，分析对比了致密砂岩气与页岩气储层力学性质特征，针对页岩岩石脆性特征以及储层岩心敏感性等实验评价关键技术，开展了大量的实验评价研究，并与现场压裂缝高示踪剂监测、地面微地震裂缝监测结果进行了对比分析。所取得的认识可为页岩储层实验评价分析及缝网压裂优化设计提供参考。

Key techniques of experimental evaluation in the fracturing treatment for shale gas reservoirs

There is a great potential in the exploration and development of shale gas reservoirs,but due to the ultra-low permeability of the matrix,it is necessary to apply large scale hydraulic fracturing to form the fracture network which is the key to obtaining a commercial gas flow.Unlike that for regular low permeability sand gas reservoirs,the fracture networks in the fracturing design for a shale gas well will highly depend on the particular laboratory evaluation techniques.Therefore,starting from the regular ...