同轴线相位法过环空找水仪的应用

Application of the coaxial transmission line phaseannular space water cut detector

介绍了同轴线相位法过环空找水仪的基本原理和试验特性.同轴线传感器是该仪器的技术核心,油水混合介质经集流器集流后,作为电磁波传播的载体在同轴线传感器内导体和外导体之间流过,测量电磁波在同轴线两端的相移,即可得到油井中油水混合介质的含水率.应用该仪器实测了大庆油田有限责任公司第二、六、七采油厂近30口油井的含水率,实测与化验结果相比,误差最大为15.1%,最小为0.6%.分析结果表明,该仪器针对油水两相流具有较好的响应特性和分辨率特性,且更适合于高含水油田的油井测试.

Fundamentals and experimental characteristics of the coaxial transmission line phase annular space water cut detector are introduced in this paper. The key technology is the coaxial transmission line transducer, the mixture of oil and water which flow across the packer and the gap between the inner and outer conductor is the carrier of the electromagnetic wave. Water cut in oil well can be gained by measuring the phase shift of the electromagnetic wave at the two ends of the coaxial transmission line. The maximal and minimal errors are 15.1% and 0.6% of the result of the detector measurement as compared with that of the measurement of water cut of about thirty oil wells of the No.1, 2 and 7 Oil Recovery Plants in Daqing Oilfield .The analysis result shows that the water cut detector has nicer response character and resolution character for oil-water two phase flow, moreover, it can be more fit for the oil well test of high water cut oilfield.