Gas-liquid separating type multiphase flowmeter

Abstract

The invention belongs to the technical field of metering equipment, and relates to a gas-liquid separating type multiphase flowmeter. The gas-liquid separating type multiphase flowmeter is assembled through a pipeline to form an integrated structure. The upper end is communicated with a gas measuring pipe through a flange, a first heater and a first valve, and the lower end is connected with an oil-water two-phase measuring pipe through a first temperature sensor and a second heater. A gas phase outlet is formed in the top of the side wall, and a liquid phase outlet is formed in the bottom of the side wall. An inner rotational flow plate tower support is fixed to the bottom of the inner wall, and a rotational flow plate tower is placed on the top of the rotational flow plate tower support. When the gas-liquid separating type multiphase flowmeter is used, oil-gas-water mixed liquid is processed through a gas-liquid two-phase separator, the exhausted gas is mixed with the oil-water mixed liquid which is heated by the heaters and measured by the temperature sensor and a liquid flowmeter after being measured by a pressure transmitter and a gas flowmeter, and the mixed gas and oil-water mixed liquid enters a downstream pipeline to flow out. The main gas-liquid separating type multiphase flowmeter is simple in structure, reliable in design principle, convenient to use and operate, high in metering accuracy, friendly in measuring environment and high in automation degree.

Description

Technical field: [0001] The invention belongs to the technical field of metering equipment, and relates to a separate metering device for oil-gas-water multiphase flow. Background technique: [0002] The oil-gas-water multiphase flowmeter is an instrument for measuring the oil-gas-water three-phase flow when the crude oil exploited in the oilfield is transported to the pipeline. The online measurement of the oil-water-gas multiphase fluid has a particularly large economic value. The traditional metering method is to send the crude oil extracted from the oil well into the three-phase separator, through which the crude oil is divided into three phases of oil, water and gas, and then the three fluids are measured separately through the flowmeter installed at the outlet of each phase of the separator; but these The traditional gas-liquid separator is complex in structure, large in size, and high in cost, which adds great difficulty to design and manufacture, and reduces the pra...

AI Technical Summary

Problems solved by technology

The traditional metering method is to send the crude oil extracted from the oil well into the three-phase separator, through which the crude oil is divided into three phases of oil, water and gas, and then the three fluids are measured separately through the flowmeter installed at the outlet of each phase of the separator; but these The traditional gas-liquid separator is complex in structure, large in size, and high in cost, which adds great difficulty to design and manufacture, and reduces the practicability of multiphase flowmeters; the combined measurement method of oil-water-gas multiphase flow can save space , funds and can continuously measure the production of each oil well in real time, and simplify the process

At present, the oil reservoir dynamic analysis and research in the oil well production measurement room is one of the indispensable procedures in the oilfield production management process. The existing research work on oil, gas and water multiphase flowmeters began around 1980. In recent years, multiphase flowmeters Oil well production measurement has attracted more and more attention from major oil companies. The effective phase holdup measurement of multiphase flowmeters in the prior art mainly relies on radiation technology, while the measurement technology based on gamma rays is not affected by fluid phase changes. It is widely used because of its influence and the fact that the measurement parts are not in contact with the fluid. However, the measurement accuracy of the water content of this technology is poor under the condition of high gas content oil-water-gas three-phase fluid, which leads to improper measurement accuracy of crude oil and cannot fully meet the actual needs. And in recent years, the supervision on the use of radiation has been greatly improved, and the use of radiation is not encouraged, resulting in the failure of the development and promotion of radiation measurement technology in oil fields

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