分布式光纤传感器在油田水井注入剖面监测中的应用

目前油田常用的注入剖面监测方法存在施工周期长、井况适应性差、有污染等缺点。为了寻找新的注入剖面监测方法，采用分布式光纤温度传感系统（DTS）监测注水过程的井温变化情况，通过井温变化斜率定性分析各层注入量的大小。采用分布式声波传感系统（DAS）监测注水过程中井下的振动情况，根据振动能量分析，定位各配水器准确位置，并估算注入量大小。根据试验结果DTS和DAS系统可用于注入剖面的快速监测和估算，利于油田方更实时且准确的掌握注入剖面情况。

Application of Distributed Fiber Optic Sensors in Oilfield Water Well Injection Profile Monitoring

At present, common injection profile monitoring methods in oilfields have the disadvantages of long construction cycles, poor well condition adaptability, and pollution. In order to find a new method for monitoring the injection profile, a distributed optical fiber temperature sensing system (DTS) was used to monitor the change in well temperature during the water injection process, and the injection amount of each layer was qualitatively analyzed by the slope of the well temperature change. The distributed acoustic wave sensing system (DAS) is used to monitor the vibration of the well during the water injection process. According to the vibration energy analysis, the precise position of each water distributor is located, and the injection volume is estimated. According to the test results, the DTS and DAS systems can be used for rapid monitoring and estimation of the injection profile, which helps the oilfield side to grasp the injection profile situation in a more real-time and accurate manner.