摘要
针对东海油气田大位移井在钻井过程中易形成岩屑床,井眼清洁困难,导致摩阻扭矩大甚至频繁出现憋泵憋扭矩等复杂的问题,提出了一种基于井眼清洁效果的钻井参数设计和钻井液性能优化方法。首先,分析大位移井井眼清洁的主要影响因素,使用VIRTUALMUD软件对影响大位移井井眼清洁性能的钻井液排量、机械钻速等工程参数和钻井液6转3转读数等钻井液参数进行优化设计。然后,通过优选合适的基础油、乳化剂和重晶石等方法对现场使用的油基钻井液进行性能改进。在大位移井A井应用优化后的钻井参数及钻井液体系,井眼清洁效果好,钻井液携岩效率高,在作业过程中未发生憋钻卡钻等复杂情况,起下钻顺利。现场应用情况表明,该方法具有较好的可行性和有效性,对于提高钻井效率和降低钻井成本具有重要意义。
This paper proposes a drilling parameter design and drilling fluid performance optimization method based on wellbore cleaning effect to address the complex problems of formation of rock debris beds and difficulty in cleaning the wellbore during the drilling process of extended reach wells in East China Sea oil and gas field,resulting in high frictional torque and even frequent occurrence of pump holding torque.Firstly,analyzed the main influencing factors of wellbore cleaning in extended reach wells,and used VIRTUALMUD software to optimize the engineering parameters such as drilling fluid displacement,mechanical drilling speed,and drilling fluid parameters such as 6 and 3 rotation readings that affect the wellbore cleaning performance of extended reach wells.Then,the performance of the oil-based drilling fluid used on site is improved by selecting suitable base oil,emulsifier,and barite.The optimized drilling parameters and drilling fluid system were applied in the extended reach well A,resulting in good wellbore cleaning effect and high rock carrying efficiency of the drilling fluid.During the operation,there were no complex situations such as stuck drilling,and the trip in and out of the well was smooth.The on-site application shows that this method has good feasibility and effectiveness,and is of great significance for improving drilling efficiency and reducing drilling costs.
作者
李根
王磊
李乾
杨雪峰
LI gen;WANG Lei;LI Qian;YANG Xuefeng(Shanghai Branch of CNOOC(China)Ltd.,Shanghai 200335,China;SINOPEC Shanghai Offshore Oil&Gas Company,Shanghai 200120,China)
出处
《海洋石油》
CAS
2024年第2期94-99,共6页
Offshore Oil
关键词
东海油气田
大位移井
井眼清洁
参数优化
East China Sea oil and gas field
extended reach well
wellbore cleaning
parameter optimization
