基于分离法的油气水三相流仿真研究

发布时间：2018-05-12 22:23

本文选题：多相流测量 + 分离器　；参考：《东北石油大学》2015年硕士论文

【摘要】：如今,国内陆上老油田大多处于中晚期开采阶段,油井中普遍存在低产液、高含水、三相流的现象。研究三相流的流动状态、测量其流量及各相含率非常必要。由于三相流流动的复杂性,其参数检测难度大,是国内外研究者争相探索的前沿课题。目前,并没有开发出能够在生产环境中直接测量未分离三相流的技术,选择先适当分离再测量可以提高测量的准确度。本装置涉及油井多相流测量技术,是一种对低流速、高含水油气水三相流的测量技术及地面测量的装置。利用油气水三相分离器进行分相流量测量的方法,将油气水三相在缓冲器中实现初步分层,针对各传感器的性质,通过多传感器信息融合的技术进行组分模态的识别,提高测量准确性、降低测量难度。本文利用FLUENT软件对分离器的工作状态进行二维和三维仿真,分别比较不同体积、形状、结构以及入口位置时分离器的分离效果来确定装置结构,并预测了分离器的分离效率,最终确定当三相总流量为0-50m3/d、含水率为60%-90%时,可以达到测量目的。此外对相含率测量误差进行了预测分析,验证了借助于油气水三相分离器进行分相流量测量的可行性。
[Abstract]:Nowadays, most of the old onshore oil fields are in the middle and late stage of production, and the phenomena of low liquid production, high water cut and three phase flow are common in oil wells. It is necessary to study the flow state of three-phase flow and measure its flow rate and phase holdup. Because of the complexity of three-phase flow, it is difficult to detect its parameters. At present, no technology has been developed to measure the unseparated three-phase flow directly in the production environment. The accuracy of measurement can be improved by choosing proper separation and then measuring. The device relates to a multiphase flow measurement technology for oil wells, and is a measuring technique for low velocity, high water, oil, gas and water cut three-phase flow and an apparatus for surface measurement. By using the method of phase separation flow measurement of oil-gas-water three-phase separator, the oil-gas-water three-phase is stratified in the buffer. According to the properties of each sensor, the component modes are identified by multi-sensor information fusion technology. Improve the accuracy of measurement and reduce the difficulty of measurement. In this paper, the working state of the separator is simulated by using FLUENT software, and the separation effect of the separator with different volume, shape, structure and entrance position is compared to determine the structure of the device, and the separation efficiency of the separator is predicted. Finally, it is determined that the measurement can be achieved when the total flow rate of three phases is 0-50 m3 / d and the water content is 60% -90%. In addition, the error of phase holdup measurement is predicted and analyzed, which verifies the feasibility of phase separation flow measurement by means of oil-gas-water three-phase separator.
【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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