膨胀管补贴技术在大港油田的应用研究  

Research on the Application of Expansion Pipe Patch Technology in Dagang Oilfield

作　　者：强杰 齐月魁 刘雪光[2] 黄满良 刘言理 齐振 时耀亭 Qiang Jie;Qi Yuekui;Liu Xueguang;Huang Manliang;Liu Yanli;Qi Zhen;Shi Yaoting(Petroleum Engineering Research Institute,PetroChina Dagang Oilfield Company;No.3 Oil Production Plant,PetroChina Dagang Oilfield Company;No.2 Cementing Company of CNPC Bohai Drilling Engineering Company Limited;No.1 Oil Production Plant,PetroChina Dagang Oilfield Company)

机构地区：[1]中国石油大港油田石油工程研究院 [2]中国石油大港油田第三采油厂 [3]中国石油渤海钻探第二固井公司 [4]中国石油大港油田第一采油厂

出　　处：《石油机械》2021年第9期105-112,共8页China Petroleum Machinery

基　　金：天津市技术发明项目“老井修复再利用膨胀管技术研发”(2018FM-3-11);中国石油大港油田公司科研项目“新型膨胀管配套技术研究与应用”(DGYT-2018-JS-276)。

摘　　要：目前大港油田套损注水井占该油田油水井总数的9.2%,影响了油田的稳产增产。鉴于此,确立采用膨胀管补贴技术对套损井进行修复的工艺方案。在简要介绍膨胀管补贴技术原理、补贴工具串结构组成、施工工艺及技术特点后,开展了膨胀管补贴管材力学性能试验,并优选高强度低成本20G管材,采用φ139.7 mm套管多级增力冷拔膨胀成形工艺,形成大通径膨胀管补贴技术,随后进行了膨胀管补贴室内试验。试验结果表明,膨胀管膨胀压力为14-18 MPa,膨胀扩大率大于8.94%,膨胀管与套管间可承受500 kN拉力而不发生相对移动,管材与套管锚定密封可靠,实现了补贴段大通径。该技术在大港油田家47-7井进行了成功应用,膨胀管补贴达到封堵套管漏点的预期效果,为该油田套损注水井修复提供了技术保障和借鉴。At present,the casing failure injection wells in Dagang Oilfield account for 9.2%of the total number of oil and water wells in the oilfield,which affects the stable production and production increase of the oilfield.In view of this,the technological plan of using expansion pipe patch technology to repair the casing failure well was established.After having briefly introduced the principle of expansion pipe patch technology,the structural composition of patch tool string,the operation technology and the technological characteristics,this article carried out mechanical property test on the expansion pipe patch tubular goods,optimized high strength and low cost tubular goods20G,used the multi-stage force-increasing cold drawing expansion forming process of φ139.7 mm casing to form large drift diameter expansion pipe patch technology,and subsequently carried out expansion pipe patch laboratory test.The test results show that the expansion pressure of the expansion pipe is 14~18 MPa,and the expansion rate of it is greater than 8.94%;the expansion pipe and the casing can withstand 500 k N tension without relative movement;the anchoring seal between the tubular goods and the casing is reliable,and the large drift diameter of the patch section is realized.This technology has been successfully applied in Well Jia47-7 of Dagang Oilfield,and the expansion pipe patch achieves the expected effect of plugging the leakage point of the pipe,which provides technical support and reference for the repair of casing failure injection wells in the oilfield.

关 键 词：注水井 套损 膨胀管 大通径 补贴技术 膨胀率 

分 类 号：TE921[石油与天然气工程—石油机械设备]