Oil, gas, water three-phase oil well continuous metering device and its measuring method
A water three-phase, oil well technology, used in mass flow measurement devices, measurement, earthwork drilling and other directions, can solve problems such as the impact of continuous operation of oil wells, and achieve accurate and reliable measurement, wide flow pattern range, and simple implementation.
Inactive Publication Date: 2011-12-14
TIANJIN UNIV
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Problems solved by technology
The problem with this method is whether the gas-liquid ratio of the three-phase fluid in the sampling part is consistent with the ratio in the original flow; whether the sampling ratio (constant) itself is affected by the flow pattern, flow fluctuation, etc.
After the liquid in the metering tank is stabilized, calculate the flow rate and holdup of each phase by measuring the differential pressure and liquid level. This method is an intermittent measurement method and has a certain impact on the continuous operation of the oil well.
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[0021] The structural principle of the present invention will be described with reference to the accompanying drawings. The working principle diagram of oil, gas and water three-phase oil well continuous metering device is as follows figure 1 shown. In the figure 1. Oil, gas and water three-phase flow inlet, 2. High-efficiency gas-liquid separator, 3. Gas path temperature sensor, 4. Gas path pressure sensor, 5. Gas path inner cone flowmeter, 6. Liquid path section Force mass flowmeter, 7, liquid temperature sensor, 8, liquid pressure sensor, 9, liquid cone flowmeter, 10, oil, gas, water three-phase outlet. The oil, gas and water three-phase fluid enters the oil, gas and water three-phase inlet 1, and the gas-liquid separation is carried out in the high-efficiency gas-liquid separator 2. The separated fluid is divided into two paths, and the gas phase flows out from the upper part of the separator. Through the gas path temperature sensor 3, the gas path pressure sensor 4, and...
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The invention belongs to the technical field of fluid measurement, and relates to a continuous metering device for oil, gas and water three-phase oil wells, comprising a high-efficiency gas-liquid separator connected to the inlet of the three-phase oil, gas and water, and a gas phase outlet of the high-efficiency gas-liquid separator It is connected with the gas phase measurement pipeline, and is equipped with a gas temperature sensor, a gas pressure sensor, a gas inner cone flowmeter with a high-frequency differential pressure transmitter; the liquid phase outlet of the high-efficiency gas-liquid separator It is connected with the liquid phase measurement pipeline, and the liquid phase measurement pipeline is equipped with a liquid path Coriolis mass flowmeter and a liquid path inner cone flowmeter. The cross-sectional area of the pipe of the cone flowmeter. The invention also provides a measurement method adopted by the device. The invention has the advantages of simple structure, no movable parts in the measuring sensor, convenient, reliable and accurate signal acquisition, and easy realization.
Description
technical field [0001] The invention belongs to the technical field of fluid measurement, and in particular relates to a system and method for measuring the phase holdup of oil, gas and water three-phase fluid and the flow rate of each phase. Background technique [0002] Crude oil is a typical multiphase flow, including three-phase substances of oil, gas and water. The oil phase refers to the liquid hydrocarbon phase in the oil well output fluid, the gas phase refers to natural gas, light hydrocarbon, and non-light hydrocarbon gas, and the water phase refers to Mineralizes the water, along with a small amount of solid phase (sand, wax, hydrate). Oil, gas, and water multiphase flow not only have a variety of flow patterns, but also have complex and changeable components during the flow process, making flow detection difficult. However, in order to carry out oilfield development reasonably, it is necessary to know the output of a single oil well, including the oil production...
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IPC IPC(8): E21B47/00G01F1/76E21B47/06
Inventor 张涛方立德姜庆勇
Owner TIANJIN UNIV