页岩气藏体积改造中的慢滑移现象

发布时间：2018-06-10 14:01

本文选题：页岩气 + 体积改造　；参考：《大庆石油地质与开发》2016年06期

【摘要】：页岩压裂中慢滑移产生的剪切变形,能在水力裂缝周围诱发大量具有渗流能力的网络通道,是页岩气单井产量的重要来源。四川两口相邻页岩气水平井,采用相同的体积改造工艺、压裂规模、压裂液及地面微地震监测技术,压裂试气产量却相差很大。在获取井物性参数的基础上,结合微地震监测及解释结果,利用气藏数值模拟方法,进行了压后产量拟合,同时对两口井压裂施工压力进行比较分析,并进行了压裂净压力拟合。结果表明:产量较高的压裂井压裂过程中,存在微地震无法监测到的沿着天然裂缝或断层不产生高频地震波的由慢滑移形成的裂缝网络,其对产量的贡献达到了71.5%。
[Abstract]:The shear deformation caused by slow sliding in shale fracturing can induce a large number of network channels with seepage ability around hydraulic cracks, which is an important source of single well production of shale gas. Two adjacent shale gas horizontal wells in Sichuan have adopted the same volume transformation technology, fracturing scale, fracturing fluid and ground microseismic monitoring technology, and the production of fracturing test gas production. On the basis of obtaining well property parameters and combining with the results of microseismic monitoring and interpretation, the fitting of post pressure production is carried out by using the numerical simulation method of gas reservoir, and the fracturing pressure of two wells is compared and analyzed, and the fracture net pressure is fitted. The results show that there exists in the fracturing process of high production fracturing well. A fracture network formed by slow sliding of a natural crack or fault that does not produce a high frequency seismic wave can not be detected by a microearthquake, and its contribution to production reaches 71.5%..
【作者单位】：中国石油勘探开发研究院廊坊分院;
【基金】：国家科技重大专项“页岩气勘探开发关键技术”(2012ZX05018004) 国家重点基础研究发展“973”计划“页岩气储层压裂改造机理研究”(2013CB228004) 中石油股份公司重大专项“体积压裂设计、实时监测及改造后评估技术研究”(2012FCGYLGZ001)
【分类号】：TE37

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