基于CTMU的井下两相流超声波流量测量系统  

Ultrasonic Flowrate Measurement System for Underground Two-Phase Rate Based on CTMU

作　　者：陈强 党博[3] 刘国权 陈国华 余刚 王俊杰 杨凯 CHEN Qiang;DANG Bo;LIU Guoquan;CHEN Guohua;YU Gang;WANG Junjie;YANG Kai(Logging Technology Research Institute,China National Logging Corporation,Xi'an,Shaanxi 710077,China;Well Logging Technology Pilot Test Center,China National Petroleum Corporation,Xi'an,Shaanxi 710077,China;School of Electronic Engineering,Xi'an Shiyou University,Xi'an,Shaanxi 710065,China;Tianjin Branch,China National Logging Corporation,Tianjin 300280,China;Xinjiang Branch,China National Logging Corporation,Karamay,Xinjiang 834000,China;Tuha Branch,China National Logging Corporation,Hami,Xinjiang 839099,China;Changqing Branch,China National Logging Corporation,Xi'an,Shaanxi 710201,China)

机构地区：[1]中国石油集团测井有限公司测井技术研究院,陕西西安710077 [2]中国石油天然气集团有限公司测井技术试验基地,陕西西安710077 [3]西安石油大学电子工程学院,陕西西安710065 [4]中国石油集团测井有限公司天津分公司,天津300280 [5]中国石油集团测井有限公司新疆分公司,新疆克拉玛依834000 [6]中国石油集团测井有限公司吐哈分公司,新疆哈密839099 [7]中国石油集团测井有限公司长庆分公司,陕西西安710201

出　　处：《测井技术》2025年第1期40-46,共7页Well Logging Technology

基　　金：国家重点研发计划项目“深海油气开采井控安全风险监测预警及应急处置技术”(2024YFC3014000);中国石油天然气集团有限公司重大工程技术现场试验项目“水平井动态监测测井仪器现场试验”(2022ZS04);中国石油集团测井有限公司科研项目“套后储层评价与井间测井装备升级与应用”(CNLC2023-6A03)。

摘　　要：基于超声波时差测量流量的方法具有非接触、易安装、不改变流体的运动状态等优点,被广泛应用于油田井下流体流速测量分析领域,能够实时测量流体流速,准确分析管道中流体流量的变化。针对传统的超声波流量计功耗高、电路复杂的缺点,根据超声波时差法测量流量的原理,结合井下高温测量环境,以及未来测井仪器低功耗、小型化的需求,以dsPIC33EV为主控芯片,设计了一种低功耗、小型化的井下超声波流量测量系统。该系统利用dsPIC33EV的充电时间测量单元CTMU(Charging Time Measurement Unit),实现声波传播时差与流量的高精度测量与计算。室内实验平台测试数据表明,该文设计的井下超声波流量测量系统测量相对误差为±7.2%,典型功耗为20mW,技术指标满足生产井流量监测需求。The method of flow measurement based on ultrasonic time difference is widely used in the field of downhole fluid velocity measurement and analysis.With the advantages of non-contact,easy installation,and no change in fluid motion state,it can measure the fluid flowrate in real time and accurately analyze the change of fluid flow in the pipeline.Aiming at the disadvantages of traditional ultrasonic flowmeter with high power consumption and complex circuit,this paper designs a low-power and miniaturized ultrasonic flow measurement system.According to the principle of ultrasonic time difference method for flow measurement,considering the downhole high temperature measurement environment and the demand of low power consumption and miniaturized logging tools in the future,dsPIC33EV is selected as the main control chip.The CTMU(Charge Time Measurement Unit)module of dsPIC33EV is used to measure acoustic wave propagation time difference and calculate flowrate with high precision.The test data of the laboratory experimental platform show that the designed ultrasonic flow measurement system comprehensive measurement error is±7.2%,and the typical power consumption is 20 mW.The indicators meet the requirements for measuring the flowrate of production wells.

关 键 词：油水两相流 流量 超声换能器 充电时间测量单元 低功耗 回波 时差法 

分 类 号：P631.84[天文地球—地质矿产勘探]