超深井155V高钢级厚壁套管开窗技术  

155V high-grade steel thick-wall casing window opening technology for ultra-deep wells

作　　者：李涛 徐卫强 苏强 LI Tao;XU Weiqiang;SU Qiang(Engineering Technology Research Institute of Southwest Oil&Gas Field Company,PetroChina,Chengdu 610031,China)

机构地区：[1]中国石油西南油气田分公司工程技术研究院,四川成都610031

出　　处：《复杂油气藏》2022年第1期96-100,共5页Complex Hydrocarbon Reservoirs

基　　金：中国石油天然气集团公司“钻完井技术集成试验与推广应用-8000m级复杂超深井优快钻完井技术集成与应用”(2019D-4210)。

摘　　要：ST102井是部署在四川盆地川西北地区双鱼石构造的一口重点探井,该井因井下事故处理困难需进行开窗侧钻。该项施工开窗点深、开窗套管钢级高壁厚大,国内外尚无成熟的开窗工具及技术借鉴。为此,分析了以往开窗工具的设计与使用情况,结合该井开窗作业面临的难点和风险,重新设计制造了适用于深侧钻点、高钢级厚壁套管开窗的斜向器和铣锥,并进行了现场应用。自7 420 m开窗,经过10趟铣锥磨铣作业后侧钻出31 m领眼,成为国内首例155V高钢级套管开窗成功案例。为后续类似套管开窗作业提供了经验。Well ST102 is a key exploration well in the Shuangyushi Formation in the northwestern Sichuan area of Sichuan Basin.Due to the difficulty in controlling downhole accidents,the well requires sidetracking by opening windows. The window opening point is deep in this structure,the window casing steel grade is high,the wall thickness is large,and no mature window opening tool and technology reference exist at home or abroad. As a result of analyzing the designs and applications of previous windowing tools,as well as the challenges and risks associated with the windowing operation in this well,deflectors and milling cones suitable for deep sidetracking points,as well as high-grade steel thick-wall casing windows,were redesigned and manufactured,and a field test was conducted.After 10 milling runs with new cone bits,a 31m pilot hole was drilled from 7 420 m to open the window,making it China’s first successful case of 155V high-grade steel casing opening. It gives experience for similar casing windowing opening operations in the future.

关 键 词：超深井 套管开窗 侧钻 高钢级套管 斜向器 铣锥 四川盆地 

分 类 号：TE242[石油与天然气工程—油气井工程]