Apparatus for evaluating foam oil generation validity, and method thereof

Abstract

The invention relates to an apparatus for evaluating the foam oil generation validity, and a method thereof, and belongs to the technical field of petroleum chemical engineering. The apparatus comprises a digital flow peristaltic pump, a gas flow meter, a sealed connection joint, a small-aperture syringe needle, a non-contact ultrasonic continuous liquid level sensor, an experiment container, a large-aperture syringe needle, a medium-aperture syringe needle, a test control panel and a computer, wherein the digital flow peristaltic pump, a gas supply flexible tube, the sealed connection joint and the syringe needles with different apertures are sequentially connected to form a gas feed experiment branch pipeline, and the digital flow peristaltic pump, the gas flow meter, the non-contact ultrasonic continuous liquid level sensor, the test control panel and the computer form a test control portion. The apparatus has the advantages of simple structure and convenient operation, and the apparatus and the method simultaneously have the advantages of realization of the automatic measurement and control of the computer, visualization of the generation, expansion and disappearance processes of foam oil, evaluation of the stability, the expansion and the gas capture ability of the foam oil, and practicability and capability of evaluation of the oil production enhancing mechanism of the foam oil.

Description

technical field [0001] The invention relates to a device and method for evaluating the effectiveness of foam oil generation, belonging to the technical field of petrochemical industry. Background technique [0002] China, Canada and Venezuela are rich in heavy oil resources. The oil produced during depressurization and cold recovery of some heavy oil reservoirs is in a continuous foam state, and the crude oil contains a large number of stable small bubbles. People call the above crude oil foam oil. The reason for foamy oil is that when the formation pressure is lower than the bubble point pressure, the dissolved bubbles escaping from the crude oil are not directly aggregated to form a continuous gas phase, but dispersed in the form of small bubbles because the viscous force of the heavy oil is greater than the gravity. caused by crude oil. A large number of production practices have shown that due to the existence of foamy oil, this type of reservoir has a slower rate of ...

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Problems solved by technology

[0005] The above-mentioned experimental method has the following disadvantages: (1) The experimental process is complex and time-consuming, requiring processes such as formation crude oil compounding, setting the pressure drop rate and depressurization; (2) The experimental equipment needs to be resistant to high temperature and high pressure, and has visualization functions, which is expensive; ( 3) Since not all heavy oil reservoirs will produce foamy oil during depressurization and cold recovery, the oil samples used in the experiment are heavy oil from specific places such as China, Venezuela or Canada, which limits the scope of research in this field; (4) the above method generates foam oil by decompression, therefore, when reaching the maximum height to measure the half-life, the bubble generation process cannot be stopped, so that the half-life measurement error is relatively large; The influence of oil stability; (6) The expansion and gas capture ability of foam oil cannot be measured at the same time, so the effectiveness of foam oil cannot be fully evaluated

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