威荣页岩气套变井绳结暂堵分段压裂工艺先导性试验  

Pilot test of staged fracturing technology with knotted temporary plugging for casing-deformed wells in Weirong shale gas reservoir

作　　者：张智强 王坤杰 王明贵 ZHANG Zhiqiang;WANG Kunjie;WANG Minggui(Sinopec Southwest Petroleum Engineering Co.,Ltd.Underground Operations Branch,Deyang,Sichuan 618000,China)

机构地区：[1]中石化西南石油工程有限公司井下作业分公司,四川德阳618000

出　　处：《油气井测试》2024年第6期42-47,共6页Well Testing

基　　金：中石化石油工程技术服务有限公司科研项目“川南深层页岩气压裂提效关键技术研究”(SG2102-03K)。

摘　　要：为提升威荣深层页岩气藏套变水平井的改造效果,开展套变井绳结暂堵分段压裂先导性试验,以期实现有效开发。结合深层页岩气的地质及工程参数特征,采用数值模拟、室内实验以及现场经验对绳结暂堵的工艺参数进行了优化,初步形成一套适用于威荣深层页岩气藏套变井的绳结暂堵分段压裂工艺。经WY28-9井现场应用,成功完成9段施工,通过微地震监测,主要进液点波及位置占比79.5%,暂堵效果对比常规暂堵球提升50%以上,由于甜点位置封堵效果过好,施工压力显著上升,压裂后期单孔进液量和砂量不足,导致产量受限。该工艺的优化迭代对套变井产量上限的提升有重要意义。To improve the stimulation effect of casing-deformed horizontal wells in the Weirong deep shale gas reservoir,a pilot test of staged fracturing technology with knotted temporary plugging was conducted,aiming for effective development.Combining the geological and engineering parameters of deep shale gas reservoirs,the process parameters of knotted temporary plugging were optimized through numerical simulation,laboratory experiments,and field experience,forming an initial staged fracturing process suitable for casing-deformed wells in the Weirong deep shale gas reservoir.Applied to well WY28-9,the method successfully completed nine stages of construction.Microseismic monitoring showed that the main fluid entry points accounted for 79.5% of the affected area,with temporary plugging effectiveness improved by over 50% compared to conventional temporary plugging balls.However,due to the excessive sealing effect at the sweet spots,construction pressure increased significantly,and the single-perforation fluid and sand intake during the later stages of fracturing were insufficient,limiting production.The iterative optimization of this process is of great significance for enhancing the production limit of casing-deformed wells.

关 键 词：威荣深层页岩气藏 套变 水平井 绳结 暂堵 分段压裂 数值模拟 微地震监测 

分 类 号：TE357[石油与天然气工程—油气田开发工程]