大位移定向钻井工艺在PY10-8/5油田的应用

Application of extended-reach directional well drilling technology in PY10-8/5 Oilfield

田志欣 李文金 雷鸿 高天云 黄南

TIAN Zhixin LI Wenjin LEI Hong GAO Tianyun HUANG Nan

中海石油(中国)有限公司PY作业公司 斯伦贝谢中国海洋服务公司

CNOOC China Limited PY Operating Company, Shenzhen 518000, Guangdong, China Schlumberger China Marine Service Company, Shenzhen 518000, Guangdong, China

PY10-8/5大位移井是中海油在中国南海的重点难点项目。该大位移井项目中表层防碰，表层大尺寸井眼造斜，高稳斜角长位移井段作业提速和井下工具的磨损都严重制约了定向施工作业进程。在深入分析该项目定向钻井作业技术难点的基础上，参考国内外大位移井定向钻井技术，根据该区块的钻井经验进行了定向作业难点攻关优化。通过优化井眼轨道，优化钻具组合，使用并优选旋转导向钻井工具，模拟与实时跟踪分析作业工程参数，逐步形成了适合该大位移井项目的定向钻井作业配套技术。这些钻井工艺的应用使PY10-8/5大位移井项目得以顺利、高效、经济地完成，并对其他同类项目有一定的借鉴意义。

Well PY10-8/5 is an extended reach well and it is a key and difficult project of CNOOC in the South China Sea. Its directional drilling is seriously restricted by surface anti-collision, whipstocking of surface large borehole, operation speed increase of long displacement sections with high hold angle and abrasion of down hole tools. In this paper, the technical difficulties of this direction well drilling project were analyzed thoroughly. Then, the technologies for dealing with these directional drilling difficulties were researched and optimized in reference to the direction well drilling technologies used in other extended reach well projects at home and abroad, especially the drilling experience in this block. And finally, the supporting technologies suitable for the directional well drilling of this extended reach well project were gradually developed by optimizing the trajectory and bottom hole assembly (BHA), adopting the rotary-steering drilling tools and simulating and real-time tracking and analyzing the operational engineering parameters. After these drilling technologies are applied in PY10-8/5 extended reach well project, the drilling is completed smoothly, efficiently and economically. The research results are of instructive significance to other projects.

10.13639/j.odpt.2017.01.008