Foam flooding physical simulation device and foam flooding physical simulation method

Abstract

The invention provides a foam flooding physical simulation device and a foam flooding physical simulation method. The device comprises a model part, an injecting part and an outflow liquid collecting part, wherein the model part is used for simulating an oil reservoir, the injecting part is used for injecting crude oil or a high-pressure displacing medium into the model part, and the outflow liquid collecting part is used for collecting outflow liquid from the model part; the injecting part comprises a gas piston container / gas piston containers (J1 or / and J2), a liquid piston container and a foam generating device, wherein the gas piston container / gas piston containers (J1 or / and J2) is / are used for storing a gas medium, the liquid piston container is used for storing foaming solution, and the foam generating device is used for producing foam by matching with the liquid piston container and constant-pressure and constant-speed pumps (K2 and K3); and the bottom part of the liquid piston container is provided with a magnetic stirring device and a magnetic rod. According to the foam flooding physical simulation device and the foam flooding physical simulation method provided by the invention, accurate control over injection rate and injection pressure is performed on high-pressure gas by adopting the constant-pressure and constant-speed pumps, so that accuracy is high, and the foam flooding physical simulation device is stable to work; the lower part of the liquid piston container is equipped with the magnetic stirring device, and liquid outflows from the side face of the lower part of the liquid piston container, so that the injected liquid is enabled to be uniform, and meanwhile, precipitates can be prevented from entering a core holder.

Description

technical field [0001] The invention belongs to the field of petroleum engineering and technology, and relates to a physical simulation device and method for oil displacement research in oil recovery technology, in particular to a foam flooding physical simulation device and method suitable for physical simulation evaluation experiments in tertiary oil recovery chambers. Background technique [0002] Petroleum is a non-renewable energy source, and economically and effectively developing existing oil fields is an eternal (important) subject. Water flooding can increase the recovery rate by 1 / 3-1 / 5. All major oil fields in my country are in the late stage of water flooding, but more than half of the geological reserves of oil still remain underground. Effective tertiary oil recovery technology is needed. Foam flooding has The main reason for profile control and oil displacement lies in the seepage characteristics of foam in porous media, that is, the effect of foam blocking lar...

AI Technical Summary

Problems solved by technology

This device can carry out a variety of simulation experiments, but it has the following deficiencies in the physical simulation experiments of foam flooding: the high-pressure gas injected into the foam generation device does not have precise control of the injection volume and injection pressure, and the accuracy is poor; the device cannot realize flooding. Real-time stirring for the medium (foaming agent) solution itself, which cannot guarantee the uniformity of the liquid; the back pressure control accuracy is poor, and the degree of automation is low

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