【作者】 刘彤；

【导师】 张瑞萍；

【作者基本信息】 西安石油大学 ， 机械电子工程， 2010， 硕士

【摘要】 三相流的准确测量对于油气资源的合理开采有着重要的意义。油气水三相流在管道内流动时存在多种流型,生产过程中原油成分、水矿化度、介质温度、含气率及乳化现象等不断发生变化,对准确测量带来了一定的困难,因而油气水三相流的精确测量一直是国内外的前沿课题。本文以三相流检测实验系统为主要研究对象,在研究实验系统的同时,对井下流量测量系统进行研究和性能试验。研制了功能较为完善的流量实验系统,针对被测介质的特性及环境特征,提出了基于静态混合器、超声波、放射源等部件构成的井下流量测量方案,建立了静态混合器的理论模型并进行了仿真,研究了基于多普勒超声波的三相流在线检测技术及相关的硬件电路；通过直接或间接的参数测量,获得被测介质的总流量、各相比例、温度、压力等有关参数。该测量方案具有非侵入、实时在线测量、低成本等特点。通过设计、计算、仿真和试验,证实了所研制的流量测量实验系统性能良好,所提出的井下流量测量系统功能完整,结构合理,在国家重大专项“深水井下流量测量系统研究”中得到了实际应用,为井下流量测量系统的研制和性能试验发挥了重要的作用。更多还原

【Abstract】 Accurate measurement of three-phase flow rational exploitation of oil and gas resources was of great significance. When three-phase fluid flowing, there are existing multiple flow types in the pipe. The accurate measurement of the difficulties brought by production process of crude oil components, because of water salinity, medium temperature, gas rate and emulsion phenomena changing. So accurate measurement of three-phase flow has been the cutting-edge topics in domestic and international.The main object of this paper is to study downhole three-phase maesurement system and test method. A more complete functional test system was developed on the basis of analyzing the measurement and environmental characteristics of the medium, and the system consists of static mixer, ultrasound Doppler and radioactive source. The theoretical model of the static mixer was estsablished and simulated, and both the test and simulation results show the designed static mixer have good properties. Moreover, the on line three phase detecton circuit is designed, and the parameters including phase ratio, temperature, pressure and other relevant parameters are measured. through direct or indirect metod. The measurement features is non-invasive, real-time and low-cost.The good properties of the developed experimental system are demonstrated by computation, simulation and application. It has been applied in the natonal major project of "Deep water flow measurement system research", and will play an important role in the dowmhole flow measurement system reserch and performance test.更多还原