Temperature-resistant and anti-salt type functional polymer and preparation method thereof

Abstract

The invention discloses a temperature-resistant and anti-salt type functional polymer and a preparation method thereof, which solve the problem of poor temperature-resistant property and anti-salt ability in the existing functional polymer. The preparation method is specifically characterized in that a functional monomer I and a functional monomer II with stable structures are introduced onto a polyacrylamide molecular chain; the functional monomer I is of a double-tail chain structure, and the double tail chains are mutually staggered in a ground layer to form a stable structure network; thefunctional monomer II is of a double-benzene ring structure and a pentanitrogen heterocycle structure, the structures are stable, and the easiness in influence by ion groups in the ground layer is avoided. The temperature-resistant and anti-salt type functional polymer has the advantages that the structure and property of the polymer are changed by the functional monomer I and the functional monomer II, so as to ensure the stability of the polymer in the ground layer; the temperature-resistant property and anti-salt ability of the functional polymer are effectively improved, and the recovery efficiency of crude oil is further improved.

Description

technical field [0001] The invention relates to a functional polymer and a preparation method thereof. Background technique [0002] At present, it has been proved that grafting functional groups on polymers will produce functions beyond the performance of polymers. For example, grafting hydrophilic or hydrophobic monomers or new functional monomers on polyacrylamide molecular chains can improve the original properties of polymers. nature. [0003] Existing patent 1 "Functional Polymer for Enhanced Oil Recovery", (Patent No.: CN200780039561) mainly changes the function of polyacrylamide by grafting hydrophilic groups and hydrophobic groups to the molecular chain of polyacrylamide Features; Existing Patent 2 "A Polymer with Surface Active Function and Its Preparation Method and Application", (Patent No.: 201610172922.X), which grafts three structural units A / B / C onto polyacrylamide ; Existing patent "Acrylamide-modified graft copolymer and its preparation method and applica...

AI Technical Summary

Problems solved by technology

Although this active functional polysurfactant increases the temperature resistance, salt resistance and thermal stability of the polymer to a certain extent, its temperature resistance and salt resistance ability is limited, and more chemical reagents are used, the reaction is more complicated, and the operation is cumbersome.

Existing patent 5 " preparation method and application of novel polymeric surfactant ", (patent No. CN103408469A) mainly is by synthesizing a kind of functional monomer, and oil displacement effect is strengthened to some extent, but the polymeric surfactant's Temperature resistance and salt resistance need to be improved

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