超深井高钢级厚壁套管开窗研究及应用

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Research and Application of Window Opening for High-grade Steel Thick-wall Casing in Ultra-deep Wells

TANG Ming1*，WANG Shuangning1，²， HE Shiming1， ZHANG Guangfu1，LIU Xiaosen³

1.StateKeybtdplatuttosityua 2.Explorationivision，SouthwestOil&GasFieldompanyPetrohina，hengdu，ichuan644ooina 3.School of Energy Engineering，Longdong University，Qingyang， Gansu， 745ooo， China

Abstract： Windowing and sidetracking is one of the important methods to deal with complex accidents underground.Windowing and sidetracking in ultra-deep wells such as not less than 7000m well depth with high steel grade （TP155V） and thick wall （15.83mm ）casing not only faces complex underground environment with high temperature and pressure， but also has the dificultyoflong operation timeand highcost. Inorder toimprove thesuccessrate and operation effciencyofhigh steel grade thick wallcasing windowing in ultra-deep wells， this paper uses ABAQUS software to establish the casing windowing side-drilling simulation modelandoptimize the windowing millngcone. Ground testsareusedto further demonstrate thesimulationresults，andthe selected onesare suitable forthe windowing millng cone inultra-deep welsforfeldapplication.The simulation shows thatthe miling shoulderand theouter circleof the cone top are the main working faces of windowopening and windowrepairing.The conicalmilingcone has thelargest windowopening stres，thehighestwindow opening efficiency， andtheregularandsmoothshapeofthe window.Inte groundtest，theconicalmillingconecansuccssullyopen the window， but the spiral miling cone and the drilltype can't open the window successfully. The casing with a depth of 7473m ，a wall thicknessof 15.83mm and steel grade TP155V was successfully drilled by conical milling cone in Well Shuangtanl02，which setthreerecords inChinaforthe depestdrllingdepth，the hghest steel gradeandthethickest wallthicknessThersearch results of this paper provide areference forthe eficient windowing and sidetracking ofultra-dep Wels，and provide support for the efficient exploration and development ofultra-deep oil and gas resources.

Keywords： ultra deep well;high steel grade thick wall casing; windowing side drill;milling cone;simulation 网络出版地址：http：//link.cnki.net/urlid/51.1718.TE.20240927.1400.014

引言

深层超深层油气资源仍然是中国油气勘探开发的重要方向，如四川盆地的蓬莱气区、塔里木盆地顺北油田、库车山前构造和准噶尔盆地的南缘区块等[1-3]

开窗侧钻技术不仅能用于老井挖潜、提高采收率、降低钻井作业成本[4-6]，还常用于处理卡钻等井下复杂事故[7-13]。（剩余15233字）