High-temperature-resistant fracturing fluid thickening agent as well as preparation method and application thereof

By combining a high-temperature resistant fracturing fluid thickener with a covalent crosslinking agent to form a network crosslinking structure, the problems of complex preparation and high cost of existing high-temperature resistant polymer thickeners are solved, enabling efficient oil extraction in deep, high-temperature, and high-salinity oil reservoirs.

CN122277801APending Publication Date: 2026-06-26SINOPEC OILFIELD SERVICE CORPORATION +2
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Patent Information

Application Number
CN202411945410.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-26
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

Existing high-temperature resistant polymer thickeners have complex preparation processes and high costs. Furthermore, their thickening effect is poor in unconventional oil reservoirs with high temperature and high salinity in deep wells, making it difficult to meet construction requirements.

Method used

A high-temperature resistant fracturing fluid thickener is prepared by using components such as acrylamide, acrylic acid, sodium p-styrene sulfonate, cationic monomers, initiators, chain transfer agents, oxidants, and reducing agents through a specific process. It is then combined with a covalent crosslinking agent to form a network crosslinking structure, thereby improving its high-temperature resistance.

Benefits of technology

It significantly improves the stability and sand-carrying capacity of fracturing fluid under high temperature and high salinity conditions, simplifies the preparation process, reduces costs, and is suitable for oil extraction in deep, high temperature and high salinity reservoirs.

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Abstract

The invention belongs to the technical field of oil exploitation, and discloses a high-temperature-resistant fracturing fluid thickening agent as well as a preparation method and application thereof. The high-temperature-resistant fracturing fluid thickening agent is prepared from the following raw materials: acrylamide, acrylic acid, sodium p-styrenesulfonate, a cationic monomer, an initiator, a chain transfer agent, an oxidizing agent, a reducing agent and deionized water. The high-temperature-resistant fracturing fluid thickening agent provided by the invention and the covalent cross-linking agent can be prepared into a temperature-resistant, salt-resistant and shear-resistant fracturing fluid, so that the stability and sand-carrying performance of a polymer under high-temperature and high-salinity conditions can be remarkably improved, and the fracturing transformation effect of a high-temperature and high-salinity unconventional oil reservoir is favorably improved.
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