基于CPW的油水两相流持水率检测方法研究
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1.长江大学电子信息学院荆州434023;2.西南石油大学地球科学与技术学院成都610500;3.中国石油集团测井有限公司装备与销售分公司西安710077

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TH762

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中国石油天然气集团公司科学研究与技术开发项目(2014B4012)资助


Water holdup measurement of oilwater twophase flow based on CPW
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1. School of Electronics and Information, Yangtze University, Jingzhou 434023, China;2. School of Geoscience and Technology, Southwest Petroleum University, Chengdu 610500, China; 3. Equipment and Sales Branch, China Petroleum LoggingCO. LTD., Xi′an 710077, China

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    摘要:

    为了提高原油的开采效率,各油田越来越多地采用注水采油的措施和水平井开采的方法。这对井下油水两相持水率的在线检测提出了更高的要求,其一要求传感器在高持水条件下具有与低持水段一样高的检测精度,其二要求单支传感器体积结构小,便于在油井截面上布置多支传感器形成检测阵列,提供水平井或大斜度井油水截面上持水率分布的差异信息,提高测量的空间分辨率。为此,提出基于共面微带传输线的油水两相流持水率检测方法。通过保角变换法分析了共面微带传输线传感器的结构参数和材料参数与电磁波传播特性之间的关系,采用片状双面S形布线结构,在小型化传感器的同时提高了检测的动态范围。数值模拟和实验结果表明,信号在传输线上的相移与持水率间具有近似线性的关系,传感器在持水率0%~100%全程范围内具有小于3%的分辨率,该方法弥补了电容法和电导法仅适合于低持水率和高持水率的弊端。

    Abstract:

    In order to improve the efficiency of crude oil production, the water injection production and horizontal well production are widely used in the oil fields. This brings higher requirements for online water holdup measurement of oilwater twophase in downhole. There are two main challenges: the one is to guarantee the high detection accuracy of sensor under the condition of high water holdup and low water holdup, and the other is the small structure of single sensor to arrange multiple sensors conveniently to form detection array on the cross section of the oil well, so as to improve the spatial resolution of the measurement by providing the distribution information about water hold up on the crosssection of horizontal wells or highly deviated wells. Hence, this work presents the water holdup detection method of oilwater twophase flow based on coplanar microstrip transmission line. Conformal transformation method is utilized to analyze the relationship between the structure parameters and material parameters of coplanar microstrip transmission line sensor and electromagnetic wave propagation characteristics. The doublesided and Sshaped wiring sheet structure is used not only to miniaturize the sensor but also improve the dynamic range of detection Numerical simulation and experimental results show that the phase shifts of the detected signal are approximately linear with the water holdup of the measured fluid. The resolution is less than 3% in the whole range of water holdup from 0% to 100%. This method overcomes the disadvantages of capacitance method and conductance method, and is suitable for low water holdup and high water holdup, respectively.

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魏勇,余厚全,戴家才,刘国权,陈强.基于CPW的油水两相流持水率检测方法研究[J].仪器仪表学报,2017,38(6):1506-1515

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  • 在线发布日期: 2017-07-21
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