渤海油田远程无线智能注水工艺技术及应用

Remote Wireless Intelligent Water Injection Technology and its Application in Bohai Oilfield

为了满足大斜度井和大位移井分层配注和提高采收率的需求,解决无人平台注水调配困难及施工成本高等难题,研究开发了远程无线智能注水工艺技术。该技术通过井下智能配水器进行井口压力与各层注入流量等数据的监控和流量控制,通过井口控制器连接井下执行器和电脑终端,实现可视化在线调配,对注水井井下数据进行读取及完成地面指令发送的任务、数据采集、保存和显示。通过地面智能分层注水控制系统,以网络传输的方式,实现客户终端与井下智能配水器双向通信。该技术在渤海油田M井首次成功应用,有效满足了该井分层配注和调配需求。现场应用结果表明,该技术可提高大斜度井与大位移井的注水精度和效率,降低后期维护成本,为解决海上无人平台分层调配难题提供了新思路。

In order to meet the requirements of stratified injection allocation and enhanced oil recovery in highly deviated wells and extended reach wells, and to solve the difficulties of water injection allocation and high operation costs in unmanned platforms, the remote wireless intelligent water injection technique was developed. Downhole intelligent water injection allocator monitors wellhead pressure and injection rate of each layer and conducts flow control. Wellhead controller connects to downhole actuators and computer terminals, realizing online visualized allocation, collection of injection well downhole data and fulfillment of the orders sent from the ground, data acquisition, preservation and display. This intelligent stratified water injection control system realizes two-way communication between client terminals and downhole intelligent water injection allocators by means of network transmission. The first successful application of this technique in Well M of Bohai Oilfield effectively meets the requirements of stratified injection and allocation. The field application results show that it is effective to improve the accuracy and efficiency of water injection in highly deviated wells and extended reach wells, reduce later maintenance cost, and provide a new idea for solving the problem of stratified injection allocation at offshore unmanned platforms.