High-temperature stable fluorocarbon-containing oil displacement surfactant and preparation method thereof

By constructing a fluorinated carbon surfactant with a triazine ring as its core, the stability and environmental protection issues of oil displacement agents in high-temperature and high-salinity reservoirs were solved, achieving a highly efficient oil displacement effect.

CN122079914BActive Publication Date: 2026-07-03NANJING HUAZHOU NEW MATERIAL CO LTD +1
2 Cites 0 Cited by

Patent Information

Application Number
CN202610534012.5
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2026-04-22
Publication Date
2026-07-03
Estimated Expiration
2046-04-22

AI Technical Summary

Technical Problem

Existing oil displacement surfactants are prone to chemical bond breakage and precipitation in high-temperature, high-salinity reservoir environments, leading to performance loss. Furthermore, traditional fluorinated surfactants pose risks of bioaccumulation and high costs.

Method used

Fluorocarbon surfactants with triazine rings as the core were constructed by stepwise substitution method. Short-chain fluorocarbon tails and triazine cores were connected by CO bonds. Hydrophilic head groups of sulfonate and hydrophobic arms of long-chain hydrocarbon groups were introduced to form an ONN triazine structure. High-temperature stable surfactants were prepared by combining them with ethylene glycol monobutyl ether as a cosolvent.

Benefits of technology

Under high temperature and high salinity conditions, surfactants maintain stability, reduce oil-water interfacial tension, and improve crude oil compatibility and water solubility, making them suitable for efficient oil displacement.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The application provides a high-temperature stable fluorocarbon oil displacement surfactant and a preparation method thereof, and belongs to the technical field of surfactants. A triazine fluorine-containing surfactant is constructed. First, 1H, 1H, 2H, 2H-perfluorooctane-1-alcohol is used to generate a fluorine-containing alkoxy anion under the action of anhydrous potassium carbonate, and a C-O bond is formed with cyanuric chloride to introduce a fluorine-containing hydrophobic arm. Then, N-methyl taurine sodium is introduced to perform N-substitution on the unsubstituted chlorine site, and a sulfonate hydrophilic head group is introduced to obtain a fluorine-containing hydrophobic arm and taurine sulfonate hydrophilic arm intermediate. Then, the remaining chlorine site is substituted with oleylamine to introduce a long-chain carbon and hydrogen hydrophobic arm, forming a surfactant mixture with an O-N-N triazine structure composed of a fluorine-containing alkoxy arm-taurine sulfonate hydrophilic arm-oleylamine carbon and hydrogen arm. After solvent removal and the addition of ethylene glycol monobutyl ether / water auxiliary solubilization system, an oil displacement surfactant with stable morphology and convenient on-site preparation and use is prepared.
Need to check novelty before this filing date? Find Prior Art