Wellhead Oil-Gas-Water Three-Phase Flow Impedance Capacitance Water Cut Measuring Device and Method

Abstract

The invention relates to a wellhead oil-gas-water three-phase flow impedance-capacitance type water content measuring device and method. The device comprises a wellhead installation module, a gas-liquid separation system, a dynamic water content measuring system, a static moisture content measuring system, a control valve group and a data processing system; and during the measurement, the oil-gas-water three-phase flow is firstly subjected to gas-liquid separation in the gas-liquid separation system, a gas phase is discharged from a gas phase outlet pipeline, a liquid phase flows through the dynamic water content measuring system and the static moisture content measuring system separately, and dynamic and static water content measurement is carried out. The device and the method have the advantages of being high in sensitivity, reliable in measurement, low in cost, long in service life and high in safety, the problem that the water content data can be obtained only after a sample is taken at a wellhead of an oil well and then is transported to a central laboratory for the process of testing and the like in the traditional production process can be solved, and efficient real-time monitoring of the oil production rate of the oil well is realized.

Description

technical field [0001] The invention relates to a land surface wellhead water content measuring device and a control method, in particular to a land surface wellhead water content measuring device and method for measuring impedance capacitance water content of three-phase flow of oil, gas and water at the land surface wellhead. Background technique [0002] In the deep storage area of ​​oil wells, the gas is mainly natural gas, hydrocarbon and non-hydrocarbon gas, which mainly exists in the crude oil in the form of dissolved gas. As the crude oil flows upward, the gas gradually precipitates as the pressure decreases. , at the wellhead of the oil well, there will be a phenomenon that the three phases of oil, gas and water coexist. With the development of computer technology and network technology, promoting the digitalization of oilfield production has become the primary development strategy of oilfield construction, but the automatic measurement of water cut parameters of si...

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Problems solved by technology

However, at present, the conductivity method needs to obtain the dynamic full water phase correction value in the oil well in advance, and cannot realize automatic measurement. The capacitance method is mainly aimed at the dynamic measurement in the case of low water cut with high accuracy, and the measurement effect in the high water cut area is extremely poor. At the same time, the conductivity method and the capacitance method are easily affected by the gas phase conditions, and the accuracy is quite different.

[0004] At present, a variety of multi-parameter oil, gas and water three-phase flow measurement devices for land surface wellheads have been developed at home and abroad, but they are expensive, bulky, and complicated to work. The basic conditions of the oilfield, such as wide, large demand, and frequent field measurements

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