Ren Weikai, Jin Ningde, Zhang Jiachen
School of Electrical and Information Engineering, Tianjin University, Tianjin 300072, People's Republic of China.
Ultrasonics. 2022 Aug;124:106740. doi: 10.1016/j.ultras.2022.106740. Epub 2022 Mar 30.
In oil-gas-water three-phase flow, the presence of two physically distinct dispersed phases leads to complex interfacial effects and relative velocities between the phases, which poses a significant challenges for gas holdup measurements. In this paper, a novel gas holdup measurement based on flow structure detection is realized. Firstly, the effect of gas bubble diameter on ultrasonic attenuation was studied, and a gas bubble diameter-based ultrasonic gas holdup measurement model was proposed. According to the model's specifications, a combined measurement system consisting of pulse transmission ultrasonic sensor and bi-optical fiber probe sensor was built. The dynamic experiment of oil-gas-water three-phase flow was conducted on a simulated well installation to measure the gas holdup using the combined measurement system. The results suggest that the proposed ultrasonic-optical measurement system can attain a high level of measuring precision.
在油气水三相流中，两种物理性质不同的分散相的存在会导致复杂的界面效应和相间相对速度，这给气含率测量带来了重大挑战。本文实现了一种基于流型检测的新型气含率测量方法。首先，研究了气泡直径对超声衰减的影响，提出了基于气泡直径的超声气含率测量模型。根据该模型的规格，构建了一个由脉冲传输超声传感器和双光纤探头传感器组成的组合测量系统。在模拟井装置上进行了油气水三相流的动态实验，使用该组合测量系统测量气含率。结果表明，所提出的超声-光学测量系统能够达到较高的测量精度。
