Synergists, oil displacing agents, their use and carbon dioxide-in-oil dispersions

CN122104199APending Publication Date: 2026-05-29CHINA PETROLEUM & CHEMICAL CORP +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA PETROLEUM & CHEMICAL CORP
Filing Date
2024-11-27
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

In existing technologies, low viscosity during carbon dioxide displacement leads to unfavorable mobility ratios, severe gas channeling, and affects sweep efficiency and oil production, making it difficult to effectively improve oil recovery.

Method used

An synergist composed of a heteroatom-containing carbonyl compound and a substituted benzene compound is combined with carbon dioxide to form an oil-in-carbon dioxide dispersion system. By introducing oxygen atoms, nitrogen atoms and benzene ring groups, the viscosity of the carbon dioxide phase is significantly increased.

Benefits of technology

It greatly increases the viscosity of carbon dioxide phase, thereby improving its recovery rate in crude oil extraction, forming a stable carbon dioxide dispersion system in oil-filled oil, and enhancing the effect of carbon dioxide flooding.

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Abstract

The present application relates to the technical field of oil reservoir exploitation, and particularly relates to a synergist, an oil displacement agent and application thereof and a carbon dioxide-in-oil dispersion system; the synergist comprises at least one of a heteroatom-containing carbonyl compound and at least one of a substituted benzene compound; the structure of the heteroatom-containing carbonyl compound is shown as formula (I), and the structure of the substituted benzene compound is shown as formula (II); the oil displacement agent formed by the synergist and carbon dioxide can effectively reduce the interfacial tension between crude oil and carbon dioxide, strengthen the interaction between carbon dioxide and crude oil with different viscosities, effectively enhance the viscosity of carbon dioxide phase, and is beneficial to improving the efficiency of carbon dioxide in oil exploitation, and has good application potential in carbon dioxide oil production operation.
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