학술논문
海上油田大斜度井缆控智能分层注聚技术研究及应用 / Research and application of intelligent polymer injection technology with cable control for high angle wells in offshore oilfield
Document Type
Academic Journal
Author
张乐; 刘长龙; 寇磊; 陈征; 张璐; 徐元德; 王胜; 薛德栋; ZHANG Le; LIU Changlong; KOU Lei; CHEN Zheng; ZHANG Lu; XU Yuande; WANG Sheng; XUE Dedong
Source
油气藏评价与开发 / Reservoir Evaluation and Development. 14(1):133-150
Subject
Language
Chinese
ISSN
2095-1426
Abstract
海上油田单管分层测调注聚工艺不能满足井斜大于60°的井况,同时测调时需要钢丝作业配合,平均单井测调用时6 h,测调效率低,无法真正意义上实现井下温度、压力、流量的实时监测与注入量调整.在介绍海上油田缆控智能注聚新技术原理、适用性与特点的基础上,研发出缆控智能注聚工作筒、大流量下高保黏通道及地面控制器等关键配套工具.实验表明,工作筒形成节流压差小于4 MPa,保黏率大于85％,性能较好.现场应用表明,缆控智能注聚技术在大斜度井的分层注聚调试过程中,可实时反馈流量、压力、温度等监测数据,提高注聚井测调效率和油藏配注达标率,为海上油田聚驱提高采收率提供了有效的技术支撑.
The single-tubing layered testing and adjustment injection process for offshore oilfields cannot meet the conditions of wells with inclinations greater than 60°.At the same time,steel wire operation is required during logging,and a single well takes six hours on average.The logging efficiency is low,and it cannot truly achieve the real-time monitoring of downhole temperature,pressure,flow rate,and injection volume adjustment.On the basis of introducing the principle,applicability,and characteristics of intelligent polymer injection technology with cable control in offshore oil fields,key supporting tools such as cable control intelligent polymer injection pipe,high viscosity maintaining channel under large flow rate,and ground controller have been developed.Experiments have shown that the pipe has better performance with a differential throttle pressure of less than 4 MPa and a viscosity retention rate of more than 85％.Field applications demonstrated that the cable-controlled smart polymer injection technology can provide real-time feedback on flow rate,pressure,temperature,and other monitoring data during the layered polymer injection debugging process in high-inclination wells.This improves the efficiency of polymer injection well testing and adjustment and the standardization rate of reservoir allocation,offering effective technical support for enhancing the recovery factor in offshore oilfield polymer flooding operations.
The single-tubing layered testing and adjustment injection process for offshore oilfields cannot meet the conditions of wells with inclinations greater than 60°.At the same time,steel wire operation is required during logging,and a single well takes six hours on average.The logging efficiency is low,and it cannot truly achieve the real-time monitoring of downhole temperature,pressure,flow rate,and injection volume adjustment.On the basis of introducing the principle,applicability,and characteristics of intelligent polymer injection technology with cable control in offshore oil fields,key supporting tools such as cable control intelligent polymer injection pipe,high viscosity maintaining channel under large flow rate,and ground controller have been developed.Experiments have shown that the pipe has better performance with a differential throttle pressure of less than 4 MPa and a viscosity retention rate of more than 85％.Field applications demonstrated that the cable-controlled smart polymer injection technology can provide real-time feedback on flow rate,pressure,temperature,and other monitoring data during the layered polymer injection debugging process in high-inclination wells.This improves the efficiency of polymer injection well testing and adjustment and the standardization rate of reservoir allocation,offering effective technical support for enhancing the recovery factor in offshore oilfield polymer flooding operations.