Research Of Oil-gas-water Three Phase Flow Data Characteristic

In this paper, the phase line water detector technology based on the multiphase flow of sub-phase holdup and flow measurements were studied.Oil-gas-water multiphase flow has become the current international research in the field of multiphase flow of hot spots, at home and abroad on Multiphase Flow Research more on the multiphase flow phase holdup and flow with a relatively small study. With the random process theory and information processing technology, continuous improvement and development, application of mathematical statistics, the process of identification, parameter estimation and pattern recognition, such as the theory and technology, multiphase flow parameter estimation soft-measuring method will become a promising research direction.Multiphase flow in the phase holdup measurement method, the phase fraction of the theoretical model while the framework must at give-phase fraction with the other the relationship between certain parameters, but in fact, is the use of commonly used test direct measurement of devices with sub-rate. In this paper, direct measurement of the electromagnetic wave measuring method at the rate of phase measurement, the use of the improved converter set to exclude the gas on the liquid holdup measurement. For flow measurement, the use of turbine flowmeter measurements, the application of the separation of the coaxial line-type phase-based method of measuring moisture content of liquid flow.In multiphase flow measurement process has a lot of parameters are not directly measured, soft-measuring method to resolve these issues. The basic idea is to put automatic control theory and knowledge production processes combine the application of computer technology, for the time being can not be difficult to measure or measurement of important variables, select some other easily measured variables, through some sort of math constitutes a relationship can be inferred, and estimated that software instead of hardware features. At the application of soft-sensor data in feature extraction is also essential, the general data can be used to describe the characteristics of its math and in line with the statistical theory.In this paper, frequency-domain model and set up neural network soft-sensing method to predict moisture content.Full text is divided into four chapters:Chapter One The phase volume fraction measurement in multiphase flowChapter Two Multiphase flow measurementChapter Three The soft measuremen and data characteristics of multiphase flowChapter Four The feature extraction based on soft measurement...