Metering device and method

Abstract

The invention discloses a metering device and method. The device comprises an insulating container, a conducting rod, a resistor rod, a back-pressure valve, a back-pressure control pump, a gas flow meter and a data monitoring terminal. An inlet of the insulating container is connected to the withdrawal end of a displacement experiment, the conducting rod is arranged inside the insulating container, the resistor rod is arranged inside the insulating container, and the resistor rod and the conducting rod are insulating; the back-pressure valve is used for controlling pressure in the insulating container; the back-pressure control pump is used for controlling the pressure of the back-pressure valve; the gas flow meter is used for measuring the volume of gas discharged by the insulating container; the data monitoring terminal is connected with the resistor rod and the conducting rod, and used for monitoring current passing through the resistor rod and the conducting rod. By the utilization of the metering device and method, the volume of crude oil containing gas and water generated by the displacement experiment can be directly metered when the crude oil contains the dissolved gas, the testing method is simple and convenient and rapid to implement, and testing results are high in precision.

Description

technical field [0001] The disclosure relates to the technical field of oil and gas field development experiments, in particular to a gas-bearing crude oil / water volume metering device and method for indoor oil displacement experiments. Background technique [0002] Water injection can replenish formation energy and displace crude oil, and is currently the most widely used EOR technology in oilfields. Indoor physical simulation experiment is an important technical means to evaluate the characteristics of reservoir water flooding development. In the process of indoor physical simulation experiment, the key is to accurately measure the volume of oil and water at the production end. [0003] At present, the measurement of gas-containing crude oil and water in indoor simulation experiments is mostly carried out under normal temperature and atmospheric environment. The volume of dissolved gas in gas-containing crude oil is measured by drainage method or flowmeter respectively, an...

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Problems solved by technology

This method requires the use of a visible high-pressure window. If the window is made of transparent pressure-resistant glass, its pressure resistance is not high. If sapphire is used as the high-pressure window, the cost is too high; at the same time, the error in measuring the volume of oil and water by the image analysis method is relatively large, so However, there are still some problems and deficiencies in this high-temperature and high-pressure oil-water metering method

[0005] Ultrasonic liquid level measurement uses the time difference generated by the wave’s rebound on the phase interface to measure the liquid level height. When it is used to measure the gas-containing crude oil and water level in a closed container, the crude oil will absorb part of the ultrasonic waves, which will affect the measurement accuracy. Complex and difficult to apply to oil-water metering in indoor experiments

[0006] The resistance method is mainly applied to the liquid level measurement of a single conductive liquid. When it is applied to the liquid level measurement of gas-containing crude oil and water in a closed container, since the gas-containing crude oil is not conductive, the resistance method cannot measure the volume of gas-containing crude oil, but can only measure The volume of water, therefore, the existing resistance method cannot measure the respective volumes of gas-bearing crude oil and water when they exist at the same time

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