“三超”气井永久式封隔器完井管柱处理工艺技术研究及实践  

Research and practice of completion string treatment technology with permanent packer in“Three Super”gas well

作　　者：马群[1] 张宏强[1] 徐鹏海 郑如森 张梁[1] 尹红卫[1] 刘汉广[1] MA Qun;ZHANG Hongqiang;XU Penghai;ZHENG Rusen;ZHANG Liang;YIN Hongwei;LIU Hanguang(CNPC Tarim Oilfield Branch Company,Korla,Xinjiang,841000,China)

机构地区：[1]中国石油天然气股份有限公司塔里木油田分公司,新疆库尔勒841000

出　　处：《天然气与石油》2023年第3期87-94,共8页Natural Gas and Oil

基　　金：中国石油天然气股份有限公司重大专项“克拉—库车坳陷深层超深层天然气开发关键技术研究与应用”(2018E-1803)。

摘　　要：克深气田埋藏超深(≥6000 m)、地层压力超高(≥120 MPa)、地层温度超高(≥165℃),气井采用井下安全阀+THT永久式封隔器完井管柱投产。针对“三超”气井生产管柱断落、变形、腐蚀泄漏,严重影响气井正常生产问题,开展了井下管柱处理工艺技术研究,形成了包括压井、径向切割炬RCT(Radial Cutting Torch,RCT)切割、永久式封隔器处理、落鱼打捞及相应工具选择在内的配套工艺技术。2015年至今己成功地对20余口事故井进行了修复,取得了良好效果,研究为“三超”气井大修复杂处理提供了可借鉴的经验。In Keshen gas field,the reservoir is extremely deep(≥6000 m),the formation pressure is extremely high(≥120 MPa)and the formation temperature is extremely high(≥165℃).The gas well was completed with a downhole safety valve THT permanent packer string.In view of the problems of production string breakage,deformation and corrosion leakage in“Three Super”gas wells,which seriously affect the normal production of gas wells,the downhole string treatment technology is studied.A complete set of technology including well killing,RCT(Radial Cutting Torch)cutting,permanent packer treatment,fishing and corresponding tool selection has been developed.Since 2015,more than 20 accident wells have been successfully repaired,and good results have been achieved,which provides reference for the ultra-deep high temperature and high pressure gas wells.

关 键 词：“三超”气井 管柱失效 大修作业 永久封隔器 复杂处理 RCT切割 

分 类 号：TE358[石油与天然气工程—油气田开发工程]