Device for measuring permeability of a foam liquid membrane and use method thereof

Abstract

The invention relates to a device for measuring the permeability of a foam liquid membrane and a use method thereof, the device comprises a device body, a bubble generator, an observation tube, an observation container, a liquid storage tank, a rotating motor, a first air source, a second air source and a digital microscope, the bubble generator, the observation tube and the observation container form a high-temperature-resistant and high-pressure-resistant closed system which is arranged in the device body; bubbles are generated in a closed system under the combined action of a rotating motor, a liquid storage tank, a first gas source and a second gas source to carry out a liquid membrane permeability experiment, and experimental data for researching a liquid membrane permeability mechanism are collected by a digital microscope; bubbles are generated through a specific bubble generator and are introduced into special observation equipment, so that accurate and clear observation and recording of the permeation process of the bubbles in a liquid film of a surfactant solution under real conditions are realized; and experimental equipment and data support are provided for researching the permeability of the foam liquid membrane and further guiding the development of the foam as a blocking agent and a displacement fluid in the improvement of the crude oil recovery ratio.

Description

technical field [0001] The invention relates to the technical field of theoretical experimental equipment for foam flooding in enhanced oil recovery, in particular to a device for measuring the permeability of a foam liquid film under high temperature and high pressure and a method for using the same. Background technique [0002] In oil field development, oil reservoirs rely on their own energy and artificial replenishment methods such as water injection and gas injection to extract crude oil. The oil and gas resources in the reservoir have not been exploited yet, and the pore structure of this kind of reservoir is complex, and the permeability is extremely low. The seepage area is not easy to mine due to capillary force, viscous force and other forces. After entering the era of tertiary oil recovery, methods such as chemical flooding, steam flooding, microbial flooding, and thermal recovery are often used to improve the sweep efficiency and increase the oil displacement a...

AI Technical Summary

Problems solved by technology

[0008] In addition, as far as the same type of devices in the industry are concerned, most of the foam flooding evaluation devices widely used at present are to study the properties of foam from the results, that is, to evaluate the foam flooding effect through the actual effect of foam flooding in the core. The ability of oil agents, the research process focuses on actual results and applications, lacks elements for basic theoretical research, and often can only draw single and specialized research conclusions for the research objects supported by experiments, and it is difficult to obtain universal and applicable results. law

However, the experimental device that can systematically study the permeability and mechanism of the foam liquid film under the formation conditions in the real environment has not yet been applied.

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