基于X型的井下流量测量误差校正系统及计算方法

The Error Correction System and Calculation Method of Flow Measurement Based on X-type Downhole

针对流体中的悬浮粒子引起的超声波时差法测量准确度下降的问题,根据时差法和频差法两种测量方式在不同测量环境下适应性的不同,提出了一种基于X型双通道时差-频差相结合的测量方法。利用WAVE2000Plus仿真分析了超声波在含有不同浓度悬浮粒子的液体中传播时其声场的变化,得到了不同位置的接收器所接收到的回波信号曲线。结果表明,悬浮粒子浓度不同,不同类型的回波信号强度也不同。针对X型测量方式提出的流量计算流程和方法,可以适应井下管道内不同悬浮粒子浓度的流体流速测量,能有效提高井下流量的测量精度。

When there are suspended particles in the measured flow, the accuracy of ultrasonic time difference method will decrease. According to the different adaptability of time difference method and frequency difference method in different measurement environments, a measurement method based on the combination of time difference and frequency difference method of X-channel is proposed. Using WAVE2000 Plus to realize the simulation analysis of ultrasonic wave propagation in liquid containing different concentrations of suspended particles, the echo signal curve is received by the receiver in different positions. The results show that if concentrations of suspended particles are different, different types of echo signal intensity is different. Therefore, the flow calculation process and method for the X-type measurement can adapt to the fluid flow velocity measurement of different suspended particle concentrations in underground pipelines, and effectively improve the accuracy of flow measurement.