Operating experience with ESP`s and permanent downhole flowmeters in Wytch Farm extended-reach wells
Operating experience with ESP`s and permanent downhole flowmeters in Wytch Farm extended-reach wells
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DOI：
10.2118/28528-pa
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发表时间：
1995-10
期刊：
影响因子：
--
通讯作者：
A. Brodie;J. Allan
中科院分区：
文献类型：
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作者：
A. Brodie;J. Allan
英国石油公司的英国陆上油田 Wytch Farm 三分之一的可采储量位于该油田的海上延伸部分。这些储量直到最近才被开发，目前正在从陆上井场钻探的大位移井中使用电潜泵 (ESP) 进行开采。成功的水平完井所带来的相对较高的生产率将 ESP 技术推向了容量和功率要求的极限。本文介绍了前三口井 ESP 启动期间和启动后遇到的一系列独特问题的案例历史。这些问题，特别是泵吸堵塞问题，可直接归因于 ESP 在井的近水平部分（82 至 85{度}）的位置。本文还描述了完井中采用的创新永久井下流量计系统。该系统测量并记录流量数据、泵吸入和排出压力以及温度。所提供的示例清楚地证明了这些数据对于理解最初的大位移井中遇到的问题以及系统在延长 ESP 运行寿命方面所发挥的作用是非常宝贵的。最后，介绍了完井设备改造和操作程序变更，成功解决了前两口井中遇到的问题，并避免了后续井中出现的问题。« less
One-third of the recoverable reserves in British Petroleum Co.`s U.K. onshore oil field, Wytch Farm, lie in an offshore extension of the field. These reserves, which have been undeveloped until recently, are now being exploited with electric submersible pumps (ESP`s) in extended-reach wells drilled from onshore wellsites. The relatively high productivities achieved as a result of successful horizontal completions have pushed ESP technology to the limits in terms of capacity and power requirements. This paper presents a case history of /the unique set of problems encountered during and subsequent to startup of the ESP`s in the first three wells. The problems, in particular pump-suction-blockage problems, were directly attributable to the position of the ESP`s in the near-horizontal section (82 to 85{degree}) of the wells. The paper also describes the innovative permanent downhole flowmeter system incorporated in the completion. The system measures and logs flow-rate data, pump-suction and -discharge pressures, and temperature. Examples are presented that clearly demonstrate how these data have been invaluable in understanding the problems encountered in the initial extended-reach wells and the role the system has played in extending ESP run lives. Finally, completion-equipment modifications and operating-procedure changes, successfully introduced to resolve the problems encountered in themore » first two wells and to avoid them in subsequent wells, are described.« less