An experimental method and device for physically simulating huff and puff oil recovery

Abstract

The invention relates to a physical simulation huff-puff production experimental method and device. The method is characterized by comprising the steps that 1, a core model for an experiment is vacuumized; 2, simulation formation water is sucked into the core model till the core model absorbs water to reach saturation; 3, crude oil is injected into the core model till no simulation formation water is drained out of the core model; 4, according to the solution gas-oil ratio data of a target oil field to be measured and core model output simulation formation water volume, the volume of gas needing to be injected into the core model is worked out; 5, the gas is injected into the core model; 6, huff-puff fluid is injected into the core model, the core model is closed, and a soaking process is simulated; 7, after experiment time is up, the core model is opened for huff-puff fluid and crude oil spurt, and one-time physical simulation huff-puff production experiment is completed. Experiments in different huff-pull ways can be carried out, influence effects of different injection parameters or parameter quantized comparison effect data, and a reliable evaluation platform is provided for thickened oil field exploitation in different huff-puff ways.

Description

technical field [0001] The invention relates to an experimental method and device for physically simulating oil production by stimulation, and belongs to the field of oil field development experiments. Background technique [0002] Huff and puff oil recovery refers to the injection of huff and puff fluids (such as steam, chemical agents, etc.) After fully functioning, the well will be opened for production after the brine is completed. At this time, the injection fluid staying in the formation will flow out of the wellhead together with the crude oil to complete the blowing process. In the process of huff and puff production, parameters such as injected fluid type, fluid injection volume, soaking time and fluid injection velocity will all affect the development effect of the oilfield, so it is necessary to determine reasonable injection parameters. At present, the determination of injection parameters mainly relies on theoretical calculations, numerical method simulations, ...

AI Technical Summary

Problems solved by technology

Among them, when performing the throughput simulation experiment, because the stimulation process must realize both injection and regurgitation, sufficient elasticity is required, and the compressibility of water, crude oil, and rock itself in the formation is very small, so that the indoor throughput The model of the physical simulation experiment is usually large, and a large enough space is needed to establish the elastic energy. Therefore, it is time-consuming, labor-intensive and inconvenient to complete a throughput experiment.

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