精细控压钻井在土库曼复兴气田中的应用与分析  

Application and Analysis of Precise Managed Pressure Drilling in Fuxing Gas Field in Turkmenistan

作　　者：寇鉴 江迎军 吴琦 杨溢 陆思宇 KOU Jian;JIANG Yingjun;WU Qi;YANG Yi;LU Siyu(Drilling&Production Engineering Technology Research Institute,CNPC Chuanqing Drilling Engineering Co.,Ltd.,Guanghan 618300,China;Underbalanced&Gas Drilling Laboratary of National Engineering Research Center of Oil&Gas Drilling and Completion Technology,Guanghan 618300,China)

机构地区：[1]中国石油川庆钻探工程有限公司钻采工程技术研究院,四川广汉618300 [2]油气钻完井技术国家工程研究中心欠平衡/气体钻井实验室,四川广汉618300

出　　处：《化工管理》2024年第26期119-124,共6页Chemical Management

摘　　要：土库曼复兴气田的卡洛夫-牛津阶地层压力极其敏感,地下裂缝、孔隙发育,钻井过程溢漏严重,且H_(2)S含量高,井控风险高,钻井难度大,通常难以钻达到设计钻井深。针对这一技术难题,土库曼引进精细控压钻井技术,通过实时监测钻井溢漏参数,优化调整钻井液密度与井口回压等技术措施,全过程维持对井底压力的精确平稳控制。精细控压成功助力3口续钻井以高质量、高效率完成作业,并创下该区块钻井液密度最低的记录,密度为1.28 g/cm^(3),平均单井漏失量减少87%,复杂处理耗时降低94%,平均机械钻速提升171%,并以最短钻井周期16.06天,实现产层一趟钻目标。此次应用,为土库曼裂缝性油藏的开发提供了技术借鉴与实践经验。The Karlov-Oxford terrace in the Turkmenistan Fuxing Gas f ield is extremely sensitive to pressure,and the formation has developed fractures and pores,resulting in serious overf low and lost circulation during drilling,and high H_(2)S content.These factors lead to high well control risks and diff iculty in drilling,and it is usually diff icult to drill the designed drilling depth.In response to the above technical problems,Turkmenistan introduced the precise managed pressure drilling technology,which realizes the purpose of maintaining accurate and stable control of bottomhole pressure through real-time monitoring of spill parameters during drilling,optimizing and adjusting drilling f luid density and wellhead back pressure and other technical measures.The precise managed pressure drilling technology successfully helped the three continued drilling Wells to complete with high quality and eff iciency,and set a record for the lowest drilling fluid density in the block with a density of 1.28g/cm^(3).Compared with conventional drilling,the average loss per well was reduced by 87%,the complex processing time was reduced by 94%,and the ROP was increased by 171%.And achieve the goal of drilling the production layer once with a minimum drilling cycle of 16.06 days.The successful application of this technology provides technical reference and practical experience for the development of fractured reservoirs in Turkmenistan.

关 键 词：精细控压钻井 窄密度窗口 溢漏复杂 井控风险 钻井效率 

分 类 号：TE242[石油与天然气工程—油气井工程]