大位移井钻井延伸极限研究与工程设计方法

Research on Extension Limits and Engineering Design Methods for Extended Reach Drilling

高德利 黄文君 李鑫

GAO Deli HUANG Wenjun LI Xin

石油工程教育部重点实验室（中国石油大学（北京）），北京 102249

MOE Key Laboratory of Petroleum Engineering, China University of Petroleum(Beijing), Beijing, 102249, China

大位移井在海洋、滩海、湖泊及山地等复杂地区油气资源的高效开发中应用广泛，大位移井钻井技术具有约束因素多、作业难度大、作业风险高等基本特点，其井眼延伸极限的预测和控制对于安全钻进意义重大。在概述国内外大位移井钻井延伸极限研究进展的基础上，重点介绍了大位移井钻井延伸极限的预测模型和分布规律，提出了基于延伸极限的大位移井钻井优化设计方法，并应用大位移井钻井延伸极限理论分析了萨哈林地区Z–42大位移井的水平段旋转钻进极限及完井管柱下入极限，认为提升钻机性能可大幅度提高井眼延伸极限，旋转接头和减阻接头可提高完井管柱的下入极限。研究结果表明，开展大位移井钻井延伸极限预测理论和控制方法研究，可为大位移井的风险预测、优化设计及安全控制提供科学依据。

Extended reach well directional drilling technology has been widely applied for the efficient development of oil and gas resources in complex areas such as oceans, beaches, lakes and mountains. However, there are many challenges in extended-reach drilling, and there are multiple constraints, which include huge technical difficulties and high risks, which make the prediction and control of wellbore extension limit of great importance for safe drilling. On the basis of summarizing research progress on the extension limit of extended reach wells at home and abroad, the prediction model and distribution law of the extension limit were introduced. Also, a extension limit-based extended reach well optimal drilling design was proposed, and such extension limit theory was used to analyze the rotary drilling limits and completion string entry limits in the horizontal section of the Z–42 extended reach well in Sakhalin area. It was considered that the hoisting performance of drilling rig could greatly improve the wellbore extension limit, and the installation of rotary joint and drag reducer joints could increase the entry limit of the completion string. The research results showed that those prediction theories and control methods could provide scientific references and best practices for risk prediction, optimized design and safety control of extended reach well drilling.

国家自然科学基金创新研究群体项目“复杂油气井钻井与完井基础研究”（编号：51821092）、国家自然科学基金石油与化工联合基金重点项目“页岩和致密油气田高效开发建井基础研究”（编号：U1762214）、国家重点研发计划课题“钻井工艺及井筒工作液关键技术研究”（编号：2016YFC0303303）和国家科技重大专项课题“复杂结构井、丛式井设计与控制新技术”（编号：2017ZX05009-003）联合资助

https://doi.org/10.11911/syztjs.2019069