Equipment and method for preparing supercritical carbon dioxide microemulsion and fly ash particle compound dispersion

A technology of carbon dioxide and fly ash, which is applied in the direction of chemical instruments and methods, bulk chemical production, drilling compositions, etc., can solve the problems of short fluidity control action time, difficulty in injecting nanoparticles, and high cost of nanoparticles , to achieve the effects of reducing the amount of adsorption, improving dispersion, and improving oil recovery
CN109943313AActive Publication Date: 2019-06-28CHINA UNIV OF PETROLEUM (EAST CHINA)
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA UNIV OF PETROLEUM (EAST CHINA)
Publication Date
2019-06-28

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Abstract

The invention relates to the technical field of oil-gas field development and oil extraction engineering, and discloses equipment and method for preparing a supercritical carbon dioxide microemulsionand fly ash particle compound dispersion. When the supercritical carbon dioxide microemulsion and fly ash particle compounded dispersion prepared by the equipment and the method flows in an oil reservoir stratum, due to the fact that the fly ash particles are solubilized in the dispersed phase the probability of contact between the fly ash particles and a pore throat wall surface of the stratum can be greatly reduced, the adsorption amount is reduced, and the utilization efficiency is improved; when the dispersion is in contact with stratum water in the stratum, reverse microemulsion of water-in-carbon dioxide can be converted into dioxide-in-water carbon emulsion, namely carbon dioxide foam, and in the conversion process, the fly ash nano particles can be adsorbed on a gas-liquid interface to hinder gas diffusion among bubbles, so that the strength of a bubble liquid film is improved, the stability of the foam is enhanced, the carbon dioxide fluidity is controlled, and the crude oil recovery is enhanced.
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Description

technical field

[0001] The invention relates to the technical field of oil and gas field development and production engineering, in particular to a preparation equipment and method for a compound dispersion of supercritical carbon dioxide microemulsion and fly ash particles. Background technique

[0002] As a gas displacement agent, carbon dioxide is widely used in the field of oil and gas field development, involving various aspects such as carbon dioxide flooding of thin oil and carbon dioxide huff and puff of heavy oil. However, due to the low viscosity and low density of carbon dioxide itself, when carbon dioxide flows in the formation, it is easy to produce viscous fingering and gravity differentiation, which makes carbon dioxide bypass the displaced crude oil and channel along high-permeability channels, reducing the The spread of carbon dioxide affects the efficiency, so that it produces ineffective injection and wastes manpower and material resources. Especially in ...

Claims

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