Limit analysis of extended reach drilling in South China Sea

查看全文 作　　者：Gao [1]Deli;Tan [1]Chengjin;Tang [2]Haixiong

机构地区：[1]MOE Key Laboratory of Petroleum Engineering, China University of Petroleum, Beijing 102249, China;[2]CNOOC China Limited-Shenzhen, Shenzhen, Guangdong 518067, China

出　　处：《Petroleum Science》索引2009年第6卷第2期,共6页

基　　金：support from the project of CNOOC China Limited-Shenzhen (Grant No. Z2007SLSZ-034);the foundation project of the State Key Laboratory of Petroleum Resource and Prospecting (Grant No. PRPDX2008-08) is gratefully acknowledged 摘　　要：Extended reach wells (ERWs), especially horizontal extended reach well with a high HD (horizontal displacement) to TVD (true vertical depth) ratio, represent a frontier technology and challenge the drilling limitations. Oil and gas reservoir in beaches or lakes and offshore can be effectively exploited by using extended reach drilling (ERD) technology. This paper focuses on the difficult technological problems encountered during exploiting the Liuhua 11-1 oil fi eld in the South China Sea, China. Emphasis is on investigating the key subjects including prediction and control of open hole limit extension in offshore ERD, prediction of casing wear and its prevention and torque reduction,φ244.5mm casing running with floating collars to control drag force, and steerable drilling modes. The basic concept of limit extension in ERD is presented and the prediction method for open hole limit extension is given in this paper. A set of advanced drilling mechanics and control technology has been established and its practical results are verifi ed by fi eld cases. All those efforts may be signifi cant for further investigating and practicing ERD limit theory and control technology in the future. 关键词：南中国海极限分析海洋法流花11-1油田控制技术钻探钻井模式套管磨损

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Limit analysis of extended reach drilling in South China Sea

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