储气库救援井磨料水射流管外开窗试验研究  

Experimental Study on External Drill Pipe Window by Abrasive Water Jet in Relief Well

作　　者：任宪可 郭爽 赵昌明[3] 张强[2] 王国强[3] 车阳 李敬彬[4] Ren Xianke;Guo Shuang;Zhao Changming;Zhang Qiang;Wang Guoqiang;Che Yang;Li Jingbin(CNPC Engineering Technology R&D Company Limited;School of Mechanical Science and Engineering,Northeast Petroleum University;CNPC Daqing Oilfield Production Technology Institute;State Key Laboratory of Petroleum Resource and Prospecting,China University of Petroleum(Beijing))

机构地区：[1]中国石油集团工程技术研究院有限公司 [2]东北石油大学机械科学与工程学院 [3]中国石油大庆油田有限责任公司采油工程研究院 [4]中国石油大学(北京)油气资源与勘探国家重点实验室

出　　处：《石油机械》2024年第5期25-31,共7页China Petroleum Machinery

基　　金：国家自然科学基金项目“高温高压多级压裂管柱振动诱发封隔器蠕动失封机理研究”(52374034);黑龙江省自然科学基金项目“储气库注采管柱流致振动与屈曲机理及其调控研究”(LH2020A001);中国石油天然气股份有限公司课题“低成本高效智能工程技术研究”(2023ZZ22-5)。

摘　　要：针对井筒不完整和存在落鱼的废弃事故老井出现井下封堵困难和气窜问题,如何实现有效封堵已成为老井改造储气库的关键。为此开展了储气库救援井磨料水射流钻杆成孔试验。试验结果表明:随着喷射距离的增大,单位时间内钻杆成孔深度显著减小;随着喷射压力的增大,钻杆成孔所需的时间缩短;钻杆成孔所需的最佳磨料质量分数为6%~8%,磨料粒径分布在40~60目范围内,可实现较好的破坏效果。通过正交试验分析认为,钻杆成孔的极限喷距随着喷射压力的增大而增大,随着喷射距离增大而减小;为缩短作业时间,应调整参数为高喷射压力(>25 MPa)和短喷射距离(<20 cm)。所得结论可为现场作业提供技术借鉴。For abandoned/old wells with imperfect borehole or fishes,downhole plugging is challenging and gas channeling often occurs.Effective plugging is crucial for these wells to be reconstructed into underground gas storages(UGSs).In this paper,an experiment was conducted on drill pipe window by abrasive water jet in a relief well for UGS.The results show that the perforation depth per unit time decreases remarkably with the increase in jet distance,and the perforation time reduces with the increase in jet pressure.The optimum mass fraction of abrasive material for drill pipe window is 6%to 8%,and the abrasive grains of 40~60 meshes can realize good blasting effects.The orthogonal tests indicate that the maximum jet distance increases as the jet pressure rises.To shorten the perforation time,high jet pressure(>25 MPa)and small jet distance(<20 cm)should be adopted.

关 键 词：储气库 救援井 落鱼封堵 磨料水射流 喷砂射孔 参数优化 

分 类 号：TE256[石油与天然气工程—油气井工程]