海上大位移井单罐内双电动潜油泵技术  

Single-Tank Dual-Electric Submersible Pump Technology in Offshore Extended Reach Wells

作　　者：张俊斌 杨智迪 秦世利 曹波波 王志伟 张永涛 ZHANG Junbin;YANG Zhidi;QIN Shili;CAO Bobo;WANG Zhiwei;ZHANG Yongtao(Technical Center of Deepwater Engineering,Shenzhen Branch of CNOOC Limited,Shenzhen,Guangdong,518000,China)

机构地区：[1]中海石油(中国)有限公司深圳分公司深水工程技术中心,广东深圳518000

出　　处：《石油钻探技术》2025年第2期46-51,共6页Petroleum Drilling Techniques

基　　金：中海石油(中国)有限公司深圳分公司科研项目“恩平高水垂比大位移井钻井极限分析与安全控制技术研究”(编号:SCKY-2023-SZ-15)资助。

摘　　要：海上大位移井采用常规双罐双电动潜油泵技术生产时,电缆外置易导致电缆破损,双泵双罐结构投影面积过大增加了节流和冲蚀风险,双Y接头结构中旁通油管与大排量电动潜油泵并列投影面积大于套管内径,旁通管还存在冲蚀风险。为此,采用设计软件对设备实际结构进行对比分析的方法,设计了单罐双电动潜油泵结构的机采方案,并搭配使用罐内封隔器和膨胀旋转短节等特殊工具将罐外电缆和管线内置,形成了单罐内双电动潜油泵技术。研究结果表明,该技术减小了罐体的投影外径,投影外径仅为193.7 mm,比双Y管的电动潜油泵外径215.9 mm更小,解决了传统电动潜油泵外置方案中电缆易损、设备冲蚀严重的问题,并在南海东部恩平21-4、流花等油田进行了成功应用。研究结果为海上大位移井电动潜油泵推广应用提供了技术支持。Externally arranged cables are prone to damage when offshore extended reach wells adopt conventional dual-tank dual-pump technology for production.Moreover,the dual-tank dual-pump configuration creates excessive projection area,increasing risks of flow restriction and erosion.In the dual Y-joint structure,the combined projection area of the bypass tubing and high-capacity electric submersible pumps(ESPs)exceeds the casing’s inner diameter,with the bypass tubing also facing erosion risks.To address these challenges,a machine-assisted production scheme featuring a single-tank dual-ESP configuration was developed through a comparative analysis of actual equipment structures by using design software.By employing specialized tools such as in-tank packers and expandable rotating subs to arrange cables and pipelines within the tank,a single-tank dual-ESP technology was formed.Research results show that this technology reduces the outer diameter of the tank’s projection to 193.7 mm,significantly smaller than the ESP’s outer diameter of 215.9 mm in the dual Y-joint structure.This solution effectively mitigates frequent cable damage and severe equipment erosion in traditional external ESP arrangements.Successful field application of the technology has been achieved in the Enping 21−4 Oilfield and Liuhua Oilfield in the South China Sea.The research results provide technical support for the popularization and application of ESPs in offshore extended reach wells.

关 键 词：单罐内双电动潜油泵 电缆保护 冲蚀 大位移井 恩平21-4油田 

分 类 号：TE355.5[石油与天然气工程—油气田开发工程]