许X36A下扬子中深探井钻井施工技术  

Drilling technology of XuX36A mid-deep exploration well in lower Yangtze

作　　者：陈小元[1] 严忠 CHEN Xiaoyuan;YAN Zhong(Jiangsu Drilling Company ofHuadong Petroleum Engineering Co.Ltd.,SINOPEC,Yangzhou 225261,China)

机构地区：[1]中国石化华东石油工程有限公司江苏钻井公司,江苏扬州225261

出　　处：《复杂油气藏》2021年第1期85-89,101,共6页Complex Hydrocarbon Reservoirs

摘　　要：许X36A井是下扬子古生界逆断块高部位的一口侧钻评价井,井深大、裸眼段长、轨道复杂且井斜位移大,所钻遇地层跨度大,岩性硬脆、可钻性差、研磨性高。钻进施工中摩阻扭矩大,机械钻速低,井壁易失稳,井眼清洁困难,易出现钻具故障,存在诸多难点。为此,从井身轨迹控制出发,优化剖面,适当降低最大井斜角,优选小角度单弯,以降低摩阻;优选七刀翼钻头,应用旋冲螺杆提速工艺,以提高机械转速;针对不同的井段特点优选钻井液体系并适时进行性能维护;针对井下复杂故障,采取了相应的预防与处理措施。许X36A井钻探获得成功。Well XuX36 A is a sidetracking evaluation well in the high part of the lower Yangtze Paleozoic reverse fault block.It has a large well depth,a long open hole section,a complex track,and a large deviation displacement.The drilled strata has a large span,hard and brittle lithology,poor drillability and high abrasiveness.During the drilling operation,there are many difficulties,such as the difficulty of friction torque control,the instability of well wall,the difficulty of hole cleaning,the low rate of mechanical drilling,the failure of drilling tools and the high-quality requirements for drilling tools.For this reason,starting from the well trajectory control,optimizing the profile,appropriately reducing the maximum inclination angle,and preferring a small angle single bend to reduce friction;optimizing seven-blade wing bit,and using rotary screw speed-up technology to increase mechanical speed;according to the characteristics of different well sections,the drilling fluid system was optimized and performance maintenance was carried out in a timely manner;corresponding preventive and handling measures were taken for complex downhole faults.Drilling of Well Xu X36 A was successful.

关 键 词：下扬子 深井 摩阻 井身轨迹 钻头优选 钻井液 许X36A 

分 类 号：TE24[石油与天然气工程—油气井工程]