Oil-gas-water metering device for core flooding experiment

Abstract

The invention provides an oil-gas-water metering device for a core flooding experiment which can automatically and accurately measure in real time, comprising a gas-liquid separator, a gas flow meter,an oil-water collector, an electronic balance, a differential pressure sensor and a computing device; the first end of the gas-liquid separator is connected to a core holder through a pipeline, the second end is connected to the gas flow meter through a dryer, and the third end is connected to the oil-water collector; the electronic balance is disposed under the oil-water collector for collectingthe weight of the oil-water mixture inside the oil-water collector; the differential pressure sensor is disposed at a first point of the oil-water collector for detecting a liquid column height H2 above the first point of the oil-water collector; and the computing device is separately connected with the electronic balance, the differential pressure sensor and the gas flow meter. The invention hasthe beneficial effects of realizing the automatic metering and recording of oil, water volume and quality, and eliminating the error introduced by human factors.

Description

technical field [0001] The invention relates to the field of metering devices, in particular to an oil-gas-water metering device for rock core displacement experiments. Background technique [0002] Oil and gas resources are an important guarantee for human activities and social development. With the rapid economic development, human demand for oil and gas resources is increasing rapidly. How to realize the efficient development of oil and gas fields is an important content of oil and gas reservoir development, and can also ensure the supply of oil and gas resources. At present, petroleum workers usually use indoor physical simulation experiments and numerical simulation techniques to simulate the dynamic process of oil and gas reservoir development, and then formulate reasonable development plans to achieve efficient development of oil and gas reservoirs. The laboratory displacement experiment is the basis for us to optimize the development parameters such as reservoir wate...

AI Technical Summary

Problems solved by technology

The laboratory displacement experiment is the basis for us to optimize the development parameters such as reservoir water injection time, injection volume, injection fluid type and injection speed. Among them, the accurate measurement of oil, gas and water recovery is the core content of the entire physical simulation experiment. The premise of correct understanding of reservoir characteristics, otherwise it will lead to a large deviation in the understanding of reservoir characteristics, and the experimental results have no practical guiding significance for reservoir development

In the process of oil, gas and water metering, the reason for the inaccurate metering of oil and water is that the separation of the two phases of oil and water will not be completed instantaneously, and there will be an emulsion that is miscible with oil and water. The existing oil, gas and water three-phase metering system has the following defects:

[0003] 1. Traditional measurement methods mostly use manual reading of oil and water volume, and the error of manual reading is uncontrollable

[0004] 2. The existing automatic metering system usually adopts the method of separating oil and water first and then measuring separately. The metering process lags behind the separation process, and is affected by the long oil-water separation time, so the lag time is long, and real-time oil and water have not been realized. Metering, the measurement result deviates from the real value when the oil and water are produced, that is, the measured value of oil and water recorded at a certain moment is the average value after accumulating oil and water produced in the previous period of time rather than the instantaneous value of the oil and water produced at this moment

[0005] 3. The two phases of oil and water under high-speed flow can easily form an oil-water miscible phase (emulsion). None of the existing metering devices can overcome the problem of the ebb and flow of oil and water metering results when the oil and water are mixed, and the oil and water cannot be obtained separately. real volume

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