浅谈BZ34-3WJ油田双泵机组落井的处理

龙江桥1，冯硕1，李海弋2，刘玉立2，孙雷2

(1.中海石油(中国)有限公司天津分公司工程技术作业中心，天津 300452；

2.中海油能源发展股份有限公司工程技术分公司，天津 300452)

摘要：以BZ34-3WJ油田某单井双泵井生产管柱落井后的复杂情况处理为例，使用PRO.E软件对双电潜泵管柱卡入尾管挂后进行应力分析，模拟出双电泵机组及管柱落井后的状态，确定了分段切割、交替打捞的处理思路。在实际打捞双电潜泵机组的过程中，针对上部电潜泵机组断裂后3段管柱同时卡在尾管挂处的情况，对落井管柱的相对位置和深度进行细致分析，及时调整打捞方案，合理选取工作参数。对于后期遗留的井下落物，结合海上油田的作业成本和生产需要，以可控成本的方式恢复了油井的生产。渤海油田首次完成的双电潜泵机组及其生产管柱的落井处理，对双电潜泵机组及其生产管柱落井后的分布和受力状态有了清晰的认识，其经验和井下出现的复杂情况都有重要的借鉴意义，为后续实施同类型作业积累了宝贵的经验。

关键词：边际油田；无修井机平台；双电潜泵；机组落井；管柱打捞

中图分类号：TE53

作者简介：第一龙江桥(1976年生)，男，工程师，2000年毕业于西安石油大学，现从事海洋石油井下作业工作。邮箱：longjq@cnooc.com.cn。

Discussion on Double Pump Unit Falling of BZ34-3WJ Oilfield

Long Jiangqiao1, Feng Shuo1, Li Haiyi2, Liu Yuli2, Sun Lei2

(1.EngineeringTechnologyOperationCenter,CNOOCTianjinBranchCompany,Tianjin300452,China；

2.CNOOCEnerTech-Drilling&ProductionCo.,Tianjin300452 ,China)

Abstract：Taking the treatment of production string falling of a single well and double pump well in BZ34-3WJ Oilfield as an example, using PRO.E software column card into the tail pipe hanging for stress analysis of the dual electric submersible pump tube. Double electric pump and pipe string falling state was stimulated, and the idea of sub cutting and alternative fishing was confirmed. During fishing dual electric submersible pump unit, three-section pipe column was hung at the tail pipe after upper electric submersible pump set was broken. For this situation, relative position and depth of fallen pipe string were analyzed in details, fishing plan was timely adjusted, and working parameters were selected rationally. For those left downhole at late stage, combined with operation cost and production needs in the offshore oilfield, production of oil wells was restored by means of controllable cost. Falling treatment of dual electric pump unit and its production string in Bohai Oilfield was completed for the first time, and clear cognition of the distribution and stress state of dual electric pump unit and its production string was obtained, which could be important reference for similar operation later.

Key words: marginal oilfields; no workover platform; double pump; set falling into the well; string fishing

1 概述

1.1 技术背景

近年来我国海上油田发展迅速，除了开发海上整装大型油田外，一些具有经济价值的小油田和边际油田的开发也卓有成效，这些油田运用“简易+低成本”的理念，平台结构简单、无修井设备，无人值守，依托油田现有的生产设施，以一条海底管线、一个平台和一条海底电缆的模式进行日常生产[1]。……