水平井体积压裂套管变形预测方法与防控措施  

Prediction Method and Prevention Measures for Casing Deformation of Horizontal Well in Volume Fracturing

作　　者：陈小璐 张雨菲 罗伟疆 蔡卓林[1] 鱼文军 CHEN Xiaolu;ZHANG Yufei;LUO Weijiang;CAI Zhuolin;YU Wenjun(Oil Production Technology Research Institute,PetroChina Xinjiang Oilfield Company,Karamay 834000,Xinjiang,China;Downhole Operation Company,CNPC Western Drilling Engineering Co.,Ltd.,Karamay 834000,Xinjiang,China)

机构地区：[1]中国石油新疆油田分公司采油工艺研究院,新疆克拉玛依834000 [2]中国石油西部钻探工程有限公司井下作业公司,新疆克拉玛依834000

出　　处：《新疆石油天然气》2025年第1期61-68,共8页Xinjiang Oil & Gas

基　　金：新疆维吾尔自治区自然科学基金青年科学基金“水平井段内多簇压裂炮眼冲蚀规律实验与模型研究”(2022D01B80)。

摘　　要：水平井体积压裂已成为致密油藏完井改造的关键技术。对于天然裂缝和断层发育的储层,高强度的储层改造极大增加了人工裂缝诱发断层滑移的概率,从而导致套管发生变形。为避免水力压裂诱发断层滑移导致套管受剪切变形,以数值模拟为手段,开展了套管变形风险点预测与防控措施研究。以H井组为实例研究对象,基于地质工程一体化模型和蚂蚁体追踪技术确定套管变形风险点,结合摩尔库伦准则和压裂参数优化,对套管变形风险点进行有效防控。研究结果表明,地质工程一体化模型和蚂蚁体追踪技术可有效识别井眼轨迹钻遇的断层和天然裂缝,预测H井组套管变形风险点20个。利用摩尔库伦准则确定断层激活滑动压力临界值为70 MPa,对H井组的体积压裂施工采用“错位射孔+降排量+降规模”对策,压裂过程中未发生套管变形。形成了一种套管变形风险点预测与防控技术,有效保障了水平井体积压裂改造安全、提升了储层改造效率,为套管变形预测及防控措施研究提供了技术借鉴。Horizontal well volume fracturing has become a key technology for well completion and reservoir stimulation of tight oil reservoirs.For reservoirs with well-developed natural fractures and faults,high-intensity reservoir stimulation greatly increases the probability of artificial fracture-induced fault sliding,leading to casing deformation.To avoid hydraulic fracturing-induced fault sliding which could lead to shear deformation of casing,numerical simulation was used as a means to study the prediction method and prevention measures of casing deformation risk points.The H well group was taken as a field example in this research,and based on the integrated geological-engineering model and ant body tracking technology,the risk points of casing deformation were determined.With Mohr-Coulomb criterion and fracturing parameter optimization,the risk points of casing deformation were efficiently controlled,with effective preventive measures.The research results indicate that the integrated geological-engineering model and ant body tracking technology can effectively identify faults and natural fractures intersected by the well trajectories,and 20 risk points of casing deformation are predicted for the H well group.The threshold of fault activation sliding pressure was determined to be 70 MPa as per the Mohr-Coulomb criterion.The volume fracturing treatment of the H well group was carried out in a way following the strategy of"unaligned perforation+reduced pump rates+reduced injected water volumes",and no casing deformation occurred during the fracturing operation process.A risk point prediction and prevention technology for casing deformation has been developed,effectively ensuring the safety of horizontal well volume fracturing opertation and improving the efficiency of reservoir stimulation,and providing technical references for the research on casing deformation prediction and prevention measures.

关 键 词：体积压裂 套管变形 地质工程一体化 摩尔库伦准则 断层滑动 

分 类 号：TE355[石油与天然气工程—油气田开发工程]