油水两相流阵列电导探针测量方法设计与研究

发布时间：2018-06-07 16:24

本文选题：油水两相流 + 阵列电导探针　；参考：《东北石油大学》2015年硕士论文

【摘要】：油气工业对石油行业的测试要求越来越高,但油井内多相流体流动的十分复杂,这就要求流动测量的相含率的测试方法的精确度要足够高,实时性要强。阵列电导探针测井是一种流动测井技术,也是一种两相流相含率测试方法,是随着观测科学和计算机技术的进步而产生的。经验证,其测试结果符合油气生产的需要。本文在参阅国内外相关文献的基础上,对现有的几种两相流相含率的测量方法进行了归纳、总结和比较,分析了各种方法的基本原理、应用范围和优缺点,并结合辽河油田原油高粘度和高含水的特点,采用了电导探针测量方法,设计了一种基于FPGA的油水两相流阵列电导探针测量系统的电路实现。本文采用FPGA设计曼彻斯特编解码器、串／并转换模块、相位选择模块等,将这些模块和其他相关电路集成在FPGA芯片上,高集成度的系统克服了分立元件电路抗干扰差和不易调整等缺陷,同时有效解决了井下环境对仪器尺寸的要求,并提高了仪器的可靠性和稳定性。最后根据实际应用背景,设计了一套由FPGA实现的曼切斯特编解码模块、激励信号产生以及油水信号采集处理等组成的水平井油水两相流阵列电导探针测量硬件系统模型,对本文所设计的油水两相流测量方案进行了验证,得到了良好的测量效果。
[Abstract]:The oil and gas industry is demanding more and more oil industry, but the multiphase fluid flow in the oil well is very complicated, which requires that the measurement method of the phase fraction of the flow measurement should be accurate enough and real-time. Array conductance probe logging is a flow logging technique and a two-phase flow phase holdup test method. It is produced with the progress of observation science and computer technology. It is verified that the test results meet the needs of oil and gas production. In this paper, based on the reference of relevant literature at home and abroad, several existing methods for measuring the phase holdup of two-phase flow are summarized, summarized and compared, and the basic principles, application scope, advantages and disadvantages of these methods are analyzed. Combined with the characteristics of high viscosity and high water cut of crude oil in Liaohe Oilfield, the electric circuit of an oil-water two-phase flow array conductance probe measurement system based on FPGA is designed by using conductance probe measurement method. In this paper, FPGA is used to design Manchester codec, serial / parallel conversion module, phase selection module and so on. These modules and other related circuits are integrated on FPGA chip. The system with high integration level overcomes the defects of the discrete component circuit, such as poor anti-interference and difficult adjustment, at the same time, it effectively solves the requirements of the downhole environment for the instrument size, and improves the reliability and stability of the instrument. Finally, according to the practical application background, a set of hardware system model of oil-water two-phase flow array conductance probe measurement is designed, which is composed of Manchester codec module realized by FPGA, excitation signal generation and oil-water signal acquisition and processing. The oil-water two-phase flow measurement scheme designed in this paper has been verified and good results have been obtained.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE31

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