摘要
分支井钻完井技术具有高效利用井口槽、提高采收率等特点,为解决分支井完井双管转向筒送入拔出过程摩阻难以准确控制的问题,研制了分支井完井双管转向筒工具,实现主井眼和分支井眼生产管柱同时回插密封。通过构建三阶段有限元仿真模型,分析了双管转向筒工具在回接筒中的送入与拔出过程,研究了摩擦因数、主分支井筒分离角及转向筒偏离方位角等因素对送入阻力、拔出阻力及等效应力的影响,摩擦因数对最大等效应力影响不明显,对行进阻力影响较大;分支井与主井筒之间的分离角对最大等效应力和行进阻力响应较大;偏离方位角对最大等效应力影响不明显,但对行进阻力影响显著,作业时应维持较小的偏离方位角,建议控制在45°以内。通过地面试验和实验井试验进行了验证,结果表明,建立的数值模型及分析方法能有效模拟双管转向筒送入拔出过程,相对采用传统简化方法计算的阻力误差由55%降至13%,实验井的产量较邻井提高了50%,验证了该工具的有效性,为分支井工具设计与作业提供了技术支持。
Multilateral well drilling and completion technologies present such characteristics as efficient utilization of well slots and enhanced oil recovery.However,accurately controlling the friction during the insertion and extraction of the double-pipe deflector in multilateral well completion presents one challenge.To address this issue,a double-pipe deflector tool was developed for multilateral well completion,enabling simultaneous reinsertion and sealing of production strings in both the original hole and the branch hole.A three-stage finite element simulation model was established to analyze the insertion and extraction processes of the deflector tool in the reconnecting sleeve.Furthermore,the effects of the friction coefficient,the separation angle between the main and lateral wellbores,and the bias azimuth of deflector on insertion resistance,extraction resistance,and equivalent stress were analyzed.The influence of friction coefficient on maximum equivalent stress is slightly,while greater on travelling resistance.The separation angle between the main and lateral wellbores influences the maximum equivalent stress and travelling resistance greatly.The influence of bias azimuth on maximum equivalent stress is slightly,while greater on travelling resistance.Thus,smaller bias azimuth had better be maintained during operation,which is suggested within 45°.The performance of the tool was verified through ground test and experimental well test.The results show that the numerical model and analysis method developed effectively simulate the insertion and extraction processes of the deflector tool.Compared to traditional simplified methods,the error in resistance calculated is reduced to 13%from 55%,and the production rate of the experimental well is increased by 50%compared to neighboring wells.This finding validates the effectiveness of the tool,which provides a technical support for the design and operation of multilateral well tools.
作者
马磊
刘和兴
梅明阳
徐靖
阳俊龙
曹思辉
MA Lei;LIU Hexing;MEI Mingyang;XU Jing;YANG Junlong;CAO Sihui(Zhanjiang Branch of CNOOC Ltd.,Zhanjiang 524057,Guangdong,China)
出处
《石油钻采工艺》
CAS
北大核心
2024年第2期154-163,共10页
Oil Drilling & Production Technology
基金
中国海洋石油集团有限公司重大科技专项“南海西部油田上产2000万方钻完井关键技术研究”(编号:CNOOC-KJ135ZDXM38ZJ05ZJ)。
关键词
分支井
完井
双管转向筒
摩阻
有限元
接触分析
非线性
multilateral well
completion
double-pipe deflector
friction resistance
finite element
contact analysis
nonlinearity
作者简介
第一作者:马磊(1982-),2005年毕业于中国石油大学(北京)机械设计制造及其自动化专业,现从事海上油气井完井、测试作业及研究工作,高级工程师。通讯地址:(524057)广东省湛江市坡头区南油一区油公司大楼。E-mail:malei1@cnooc.com.cn;通讯作者:徐靖(1990-),2013年毕业于西南石油大学石油工程专业,现从事海上油气井完井装备的相关研究工作,工程师。通讯地址:(524057)广东省湛江市坡头区南油一区油公司大楼。E-mail:xujingcnooc@163.com。
