测井技术2025，Vol.49Issue(1)：40-46,7.DOI:10.16489/j.issn.1004-1338.2025.01.005
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
摘要
Abstract
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Key words
oil-water two-phase flow/flowrate/transducer/charging time measurement unit/low-power consumption/echo/time difference method引用本文复制引用
陈强,党博,刘国权,陈国华,余刚,王俊杰,杨凯..基于CTMU的井下两相流超声波流量测量系统[J].测井技术,2025,49(1):40-46,7.基金项目
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) （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) （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) （CNLC2023-6A03）
