低温低矿化度环境可溶桥塞开发与性能评价  

Development and Performance Evaluation of Soluble Bridge Plug Used in Low Temperature and Low Salinity Conditions

作　　者：张文远 伊明 朱年涛 乔东宇 李富强 周双君 封猛 Zhang Wenyuan;Yi Ming;Zhu Niantao;Qiao Dongyu;Li Fuqiang;Zhou Shuangjun;Feng Meng(Engineering Technology Research Institute,CNPC Xibu Drilling Engineering Company Limited;School of Mechanical Engineering,Yangtze University;Drilling Fluid Company,CNPC Xibu Drilling Engineering Company Limited;Well Test Company of CNPC Xibu Drilling Engineering Company Limited)

机构地区：[1]西部钻探工程技术研究院 [2]长江大学机械工程学院 [3]西部钻探钻井液分公司 [4]西部钻探试油公司

出　　处：《石油机械》2024年第2期50-55,共6页China Petroleum Machinery

基　　金：西部钻探工程有限公司科学研究与技术开发项目“井筒完整性综合治理技术研究与应用”(2023XZ202)。

摘　　要：在低温、低矿化度条件下的地层环境中,可溶桥塞的整体性能无法满足国内部分油田项目的实际施工需求。鉴于此,从可溶桥塞的材料选型、结构设计及计算、施工工艺研究等方面入手,成功研发出一款适用于低温、低矿化度条件下的可溶桥塞,并开展了现场试验。研究结果表明:研发的可溶桥塞能够适用于低温、低矿化度条件下的地层环境,最高耐温150℃,承压70 MPa,在20~70℃、Cl-质量浓度1000~3000 mg/L条件下,能够实现整体溶解;在油田现场压裂中,能够节省后期钻塞过程,明显提升了现场生产效率;该可溶桥塞工具实现了全可溶,明显减少了现场施工作业成本,故选择适合的可溶桥塞工具,可达到施工效果最大化。研究结论可为实现油田高效、低成本压裂施工提供技术指导。In low temperature and low salinity formation conditions,the overall performance of soluble bridge plug cannot meet the actual operation requirements of some oilfields in China.In view of material selection,structural design and calculation,and operating process,a soluble bridge plug suitable for low temperature and low salinity conditions was developed,and tested on site.The results show that the soluble bridge plug can be applied in low temperature and low salinity formation conditions,with a maximum temperature/pressure of 150℃/70 MPa.It can be completely dissolved under the conditions of 20℃to 70℃and Cl-mass concentration of 1000 to 3000 mg/L.In field fracturing,the late plug drilling process can be omitted,which significantly improves the field production efficiency.The soluble bridge plug can be fully dissolved,which significantly reduces the field operation costs,so the selection of a suitable soluble bridge plug can achieve maximum operation effect.The research findings provide technical guidance for achieving efficient and low-cost fracturing operation in oilfields.

关 键 词：压裂 可溶桥塞 优化设计 仿真分析 性能试验 现场应用 全可溶 

分 类 号：TE934[石油与天然气工程—石油机械设备]