CAJ | 학술논문

徐闻X3井是一口部署在北部湾盆地迈陈凹陷区块的多靶点定向井，也是中石化首口超高温超深四靶点定向探井，该井二开井段长达2667 m，为大尺寸长裸眼井眼；三开实钻裸眼段长1540 m。该地区地温梯度高，井深5974 m电测温度为211℃，高温影响MWD仪器使用性能，下部井段只能依靠多点投测，井身轨迹控制具有滞后性。为实现徐闻X3井井眼轨迹的有效控制，该井直井段采用塔式钻具组合，长达2028 m的直井段最大井斜角仅为1.39°，定向井段采用1.5°的单弯螺杆定向，稳斜井段采用满眼、微增钻具组合钻进。该井4个靶点均顺利中靶，实钻井眼轨迹达到设计要求，完钻井深6010 m，完钻水平位移达2017.22 m。该井的顺利完钻为同类井的施工提供了经验。
서문X3정시일구부서재북부만분지매진요함구괴적다파점정향정，야시중석화수구초고온초심사파점정향탐정，해정이개정단장체2667 m，위대척촌장라안정안；삼개실찬라안단장1540 m。해지구지온제도고，정심5974 m전측온도위211℃，고온영향MWD의기사용성능，하부정단지능의고다점투측，정신궤적공제구유체후성。위실현서문X3정정안궤적적유효공제，해정직정단채용탑식찬구조합，장체2028 m적직정단최대정사각부위1.39°，정향정단채용1.5°적단만라간정향，은사정단채용만안、미증찬구조합찬진。해정4개파점균순리중파，실찬정안궤적체도설계요구，완찬정심6010 m，완찬수평위이체2017.22 m。해정적순리완찬위동류정적시공제공료경험。
Well Xuwen X3 is a multi-target directional well, deployed in Maichen depressed block in Beibuwan Basin. The sec-tion of the second spud has large wellbore diameter and long open-hole section with the length of 2 667 m. The open-hole length of the third spud is 1 540 m. The geothermal gradient is high, and the electrically measured temperature is 211℃in the depth of 5 974 m. The high geothermal gradient in the area affects the performance of MWD instrument, so multi-point measurement is necessary for lower formations, leading to wellbore trajectory control posterity. To achieve effect Well Xuwen X3 wellbore trajectory control, tapered hole assembly is used for the vertical interval, with length of 2 028 m,and the biggest hole angle is only 1.39 degree. For directional interval, the screw drill with 1.5 degree is used to orientate. In angle holding interval, the packed hole assembly and slightly building assembly are used. The four target points meet the drilling design and hole trajectory conforms to the demand of design, with the drilling depth of 6010m and the horizontal displacement of 2 017.22 m. It provides experience for similar well drilling operation.