天然气与石油2024，Vol.42Issue(4)：38-43,6.DOI:10.3969/j.issn.1006-5539.2024.04.005
断层封闭性评价及过断层钻井关键技术研究与应用
Research and application of fault sealing evaluation and key technologies for drilling through faults
摘要
Abstract
14 wells of LD oilfield are designed to drill into the Liaoxi No.1 fault at depth ranging from 847 to 993 m.This fault is an inherited growth normal fault with a general northeast trending direction and extends through the seabed.To address the feasibility of encountering faults during drilling and the safety of drilling through faults,the sealing performance of the Liaoxi No.1 fault was evaluated using methods such a mudstone smearing factor and cross-sectional normal pressure analysis in conjunction with actual drilling conditions.Through analysis and research,innovative methods have been proposed for calculating the mud weight design for drilling through fault planes and optimizing the trajectory of wells crossing faults,based on the calculated collapse pressure.At the same time,the trajectory of the wells was optimized based on these results.Techniques for preventing and plugging leaks in drilling fluids during fault crossing were also established.The research results provide guidance for the feasibility analysis of drilling faults,wellbore trajectory design,and safe drilling through faults.关键词
辽西一号/断层封闭性/坍塌压力/防漏堵漏/轨迹设计Key words
Liaoxi No.1 fault/Fault sealing/Collapse pressure/Leak prevention and plugging/Trajectory design引用本文复制引用
张磊,李治衡,林海,李文龙,侯欣欣..断层封闭性评价及过断层钻井关键技术研究与应用[J].天然气与石油,2024,42(4):38-43,6.基金项目
国家自然科学基金项目"基于井筒—裂缝—封堵层耦合的堵漏力学机理研究"(52074312) （52074312）
