长裸眼恶性漏失井膨胀管堵漏适用技术  

Application of expandable tubular plugging technology in long open hole wells with severe lost circulation

作　　者：郑有成[1] 郭建华 ZHENG Youcheng;GUO Jianhua(PetroChina Southwest Oil&Gasfield Company,Chengdu,Sichuan 610051,China;Engineering Technology Research Institute,PetroChina Southwest Oil&Gasfield Company,Chengdu,Sichuan 610017,China)

机构地区：[1]中国石油西南油气田公司 [2]中国石油西南油气田公司工程技术研究院

出　　处：《天然气工业》2023年第8期98-107,共10页Natural Gas Industry

基　　金：中国石油天然气股份有限公司重大工程技术现场试验项目“膨胀管裸眼封堵技术与装备现场试验”(编号:2017F-19)。

摘　　要：四川盆地天然气井钻井过程中,经常面对长裸眼井段、多压力系统、承压能力要求高的堵漏需求,但已有的化学类堵漏及承压技术无法完全达到承压目标及时效要求。为此,针对四川盆地天然气井恶性井漏问题,研发了高抗挤膨胀管、配套工具及液体体系,开展了管材性能评价及适用边界分析,形成了膨胀管裸眼封堵技术并开展了现场应用。研究结果表明:(1)低碳锰合金化技术、“第三代”Mn-TRIP钢材配方以及高标准的生产制造工艺可大幅提高管材性能,新研制的高抗挤膨胀管胀后冲击韧性≥105 J,抗外挤强度≥20MPa;(2)基于测定的螺纹接头连接效率,参考API标准及J55膨胀管应用边界计算方法,建立了高抗挤膨胀管的适用边界;(3)基于高抗挤膨胀管,结合水力扩眼器、悬砂清砂液及固井水泥浆等,形成了“扩眼—膨胀管下入—膨胀作业—恢复钻进”全过程规范化膨胀管裸眼封堵施工工艺。结论认为:(1)该技术在四川盆地已成功应用8井次,累计作业长度5177.81 m,承压能力达35 MPa以上,均实现了裸眼井段的有效封隔;(2)该技术有望成为解决恶性井漏的有效途径,并可在井身结构拓展、高压盐水封隔及井筒修复等领域进行推广应用。The drilling of natural gas wells in the Sichuan Basin often faces the plugging demand of long open hole section,multipressure system and high pressure-bearing capacity,but the existing chemical plugging and pressure-bearing technologies cannot fully meet the requirement of pressure-bearing target and time efficiency.In order to solve the problem of severe lost circulation in the natural gas wells in the Sichuan Basin,this paper researches and develops high-performance expandable tubulars,supporting tools and liquid system,and carries out performance evaluation and application boundary analysis of expandable tubulars.The expandable tubular based open hole plugging technology is formed and applied on site.The following research results are obtained.First,the low carbon manganese alloying technology,the third generation of Mn-TRIP steel formula and the high standard manufacturing process can greatly improve the performance of expandable tubulars.The impact toughness of the newly developed expandable tubular after expansion is greater than 105 J,and the collapse strength is more than 20 MPa.Second,based on the measured connection efficiency of the threaded joint,the application boundary range of the high-performance expandable tubular is established by referring to API standard and the calculation method of application boundary range of the J55 expandable tubular.Third,based on the high-performance expandable tubulars,combined with hydraulic reamer,suspension sand cleaning fluid and cementing slurry,the standardized construction process of"hole reaming,expandable tubular running,expandable tubular expansion,and drilling recovery"is formed for the expandable tubular based open hole plugging.In conclusion,this technology has been successfully applied eight times in the Sichuan Basin,with a cumulative operation length of 5177.81 m and a pressure bearing capacity of more than 35 MPa,and all of their open hole sections are plugged effectively.What's more,this technology is expected to be an effective method for solving t

关 键 词：膨胀管 裸眼封堵 长裸眼井段 恶性井漏 低碳锰合金化 恶性井漏治理 井身结构拓展 井筒修复 

分 类 号：TE28[石油与天然气工程—油气井工程]