阿尔油田定丛井井眼轨迹控制技术

Trajectory control for directional cluster wells in Ar’er Field

崔露 孟振期 徐明磊 相征 马晓敏

CUI Lu MENG Zhenqi XU Minglei XIANG Zheng MA Xiaomin

渤海钻探工程公司工程技术研究院华北分院，河北任丘　062550 渤海钻探工程公司第二钻井公司，河北廊坊　065000

Huabei Branch, Drilling Technology Research Institute of Bohai Drilling Engineering Co. Ltd., Renqiu 062550, China The Second Drilling Company, Bohai Drilling Engineering Co. Ltd., Langfang 065000, China

针对华北油田阿尔凹陷区块地质构造特征，采用定向丛式井开发，井眼采用三段制井眼轨道设计剖面。该区块地层互层多、倾角大，上直井段钻速快、易井斜、跑方位、轨迹控制难度大，延长了钻井周期，制约了开发速度。在该区块进行丛式井开发，布井多，井网密，整拖距离5~8 m左右，井间碰撞因素较多，钻井施工过程中绕障难度大，钻具摩阻、扭矩较大，对井眼轨迹控制和监测技术要求高。实钻过程中采用了定向剖面优化设计，MWD无线随钻定向与监测，及时调整井眼轨迹，保证了井眼轨迹规则，减少了后期采油杆管的偏磨效应。

Using directional cluster wells to develop Ar’er depression zone of Huabei Field, according to the geological structure characteristics. The wellbore profile is designed with three sections. The unfavorable factors for developing the zone includes a lot of interbeds, high dip angle, high drilling speed for upper vertical wellbore section, and deviating easily, therefore the trajectory control is difficult, which extends the drilling period and limits the development speed. In the zone, the application of cluster wells request quite a few wells with high well density, and dragging distance of 5~8 m. There are many factors leading to cross-hole collision, so it is difficult to bypass obstacles. Furthermore, the BHA friction and torque are great, and it requires a high level for trajectory control and monitoring techniques. In drilling process, the directional profile optimization technique and the wireless MWD direction and monitoring are taken to adjust timely well trajectory, which guarantees the proper trajectory, and decreases the eccentric wear effect from weighted pump rods used later.