Compounds, methods for their preparation, and oil displacement polymers, methods for their preparation, and uses

CN117945959BActive Publication Date: 2026-06-12CHINA PETROLEUM & CHEMICAL CORP +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHINA PETROLEUM & CHEMICAL CORP
Filing Date
2022-10-28
Publication Date
2026-06-12

AI Technical Summary

⚠Technical Problem

Existing chemical flooding technologies are not effective in high-temperature and high-salinity environments, making it difficult to effectively reduce the heavy oil/water mobility ratio and expand the swept volume. Furthermore, they have limited functionality and cannot meet the recovery requirements of complex reservoirs.

⚗Method used

Design a compound to prepare a polymer with rigid benzene ring groups by adjusting the lengths of the hydrophilic and lipophilic segments. This polymer can reduce the interfacial tension between oil and water and improve oil displacement efficiency under high temperature and high salt conditions.

🎯Benefits of technology

In high-temperature and high-salinity environments, the compound can effectively emulsify and disperse heavy oil, improve oil displacement efficiency, and is suitable for conditioning and viscosity reduction applications in high-temperature and high-salinity reservoirs and heavy oil reservoirs.

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Abstract

The application relates to the technical field of oil exploitation, and discloses a compound, a preparation method of the compound, an oil displacement polymer, a preparation method of the oil displacement polymer and application of the oil displacement polymer. The compound contains a structural unit shown in formula (1) and a structural unit shown in formula (2); wherein M is H, sodium, potassium or NH4; 1<=n1<=12; 1<=n2<=19; the polymer has the functions of dispersing and emulsifying crude oil, reducing oil-water interfacial tension and improving oil displacement efficiency while having the function of thickening water phase.
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