徐闻X3井井眼轨迹控制技术　　

Trajectory control technology for Well Xuwen X3

刘特立 李胜 张宗林 洪进富 徐春华

LIU Teli LI Sheng ZHANG Zonglin HONG Jinfu XU Chunhua

江苏石油工程有限公司安徽分公司，安徽天长　239321 中石化石油工程技术研究院，北京　100101

Sinopec Jiangsu Petroleum Engineering Co., Ltd, Anhui Drilling Branch Company, Tianchang 239321, China Sinopec Research Institute of Petroleum Engineering, Beijing 100101, China

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2 667 m，为大尺寸长裸眼井眼；三开实钻裸眼段长1 540 m。该地区地温梯度高，井深5 974 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2 028 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6 010 m，完钻水平位移达2 017.22 m。该井的顺利完钻为同类井的施工提供了经验。

Well Xuwen X3 is a multi-target directional well, deployed in Maichen depressed block in Beibuwan Basin. The section 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.