注水井双流量高效分层测调技术

HIGH-EFFICIENCY DOUBLE-FLOW-RATE SEPARATE-ZONE TESTING-ADJUSTING TECHNOLOGY FOR INJECTORS

常规注水井测调技术工序繁琐、测调效率低、控制精度低。介绍了一种用于分层注水井流量调配的带有双流量探头的电动流量测调技术，该技术是通过地面测试电缆将测调仪器下到井内预定位置，并使之与井下活动式流量控制器对接；通过地面控制系统驱动流量控制器，改变流量大小；再通过双流量探头计量控制器的上下流量，计算出目的层流量值，并最终调节到所需流量值。实现了地面实时监控注水井调配过程中的测试数据，自动智能调节井下流量，同步录取测试资料及所有类型配水管柱的单一层段流量测调。注水井单井测调时间可缩短到1．5d，测调误差控制在5％以内，现场应用效果较好。

The conventional testing-adjusting technology for injectors have tedious procedures, low testing-adjusting efficiency and low control accuracy. This paper introduces a new electric flow-rate testing-adjusting technology that applies double flow-rate probes to control the flow-rate allocation of separate-zone injectors. The testing-adjusting tool for this technology is placed on the desired downhole location by the testing cable on the surface and then is jointed to the movable flow controller. The flow controller is actuated by the surface control system to change the flow-rate. Then its upper and lower flow-rates are measured by the double-flow-rate probes, and then the flow-rate value of zone of interest is calculated, based on which the desired flow-rate value is finally to be achieved by flowrate adjustment. This technology can realize the following functions, such as real-time surface monitor and control to the testing data during the water allocation of injectors, intelligent and automated adjustment of downhole flowrate, synchronous acquisition of testing data, and test and adjustment of flow-rate from ＇single-layer with various types of water-allocation pipe strings. By using this technology, the time spent on the test and adjustment of single injector can be reduced to 1.5 days, the testing-adjusting error can be controlled within 5 %. A relatively good field application effect has been obtained.