喷射泵井工况诊断与调参技术研究

为了使喷射泵工作在最优工况 ,提高喷射泵采油系统的效率 ,给出一种根据地面测试数据推断喷射泵井工况并同时计算油井产能的方法 .地面测试参数包括动力液和混合液的压力、流量、温度等 .采用多相垂直管流的计算方法由地面测试数据得到井下动力液泵入口处和混合液泵出口处的流量、压力和温度 .用喷射泵在非等密度体系中的特性方程计算得到喷射泵工作的压力比 ,由压力比计算得到泵吸入口处的压力 .这样 ,就可以计算出诊断喷射泵井工况所需要的压力比 ,流量比和泵效等工况参数 ,泵吸入口压力还可用来计算油井的产能曲线 .用这种方法对喷射泵系统进行工况诊断仅需在地面测试数据 ,避免了测试井下数据的困难 ,测试过程不需停泵 .文中论述了喷射泵井生产系统主要故障形式和诊断方法 ,并给出了两口油井的诊断实例

Diagnosis of the Working State of a Hydraulic Jet Pump Production System and Adjustment of Its Parameters

In order to make a jet pump production system work under optimal conditions and to increase the efficiency of the system, a method is put forward of calculating the working parameters of the jet pump according to the data measured in surface. The parameters include the pressure ratio, flow rate ratio and efficiency. Based on the parameters, the working state of the jet pump production system can be deduced, and the faults of it can be diagnosed. The inlet pressure of the jet pump can also be obtained by the pressure ratio, and it can be used for acquiring the productivity curve of an oil well. The fault diagnosis of the jet pump production system is carried out by this method without the termination of pumping and the downhole measurement of data. Two examples show that the method is feasible and effective.