A kind of oil displacement polymer containing silicate structure and its application

Abstract

The invention discloses an oil displacement polymer containing a silicate structure and its application. The oil displacement polymer containing silicate structure of the present invention is prepared by the method comprising the following steps: (1) in an inert atmosphere, water-soluble monomers, water and a solution containing a silicate structure monomer are mixed to obtain Mixed solution; (2) Add sodium citrate, ferrous sulfate, tetramethylethylenediamine, 4,4'-azobis (4-cyanovaleric acid), ammonium persulfate and Hydrogen peroxide is mixed and reacted to obtain a polymer containing a silicate structure. The oil-displacing polymer of the invention has improved shear resistance, temperature resistance and aging resistance, and can increase the oil displacement rate during application.

Description

technical field [0001] The invention relates to an oil-displacement polymer containing a silicate structure and its application, and belongs to the technical field of water-soluble polymer synthesis. Background technique [0002] The exploitation and utilization of petroleum plays an important role in the development of the national economy. At present, most of the developed oilfields in my country have entered the middle and late stage of water injection development, and only through the tertiary oil recovery technology can the production be stabilized. In tertiary oil recovery technology, polymer flooding technology is a flooding method that injects a water-soluble polymer solution into the oil reservoir. As the viscosity of the injected water is increased and the mobility ratio is improved, the area affected by the displacement phase can be effectively increased, the oil saturation can be reduced, and the oil recovery can be enhanced. Therefore, tertiary oil recovery te...

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Problems solved by technology

[0007] The above-mentioned patents all achieve the improvement of polymer temperature and salt resistance by introducing functional monomers. During this process, there are often the following deficiencies: the preparation process of functional monomers is cumbersome, and there are follow-up operations such as purification, which increases product costs; Compared with amide monomers, functional monomers have poor polymerization activity, and the molecular weight of polymers is not high. During use, the concentration of polymers required is high; the introduction of hydrophobic functional monomers and internal salt functional monomers reduces the polymer During use, the dissolution time of the polymer increases, and the proportion of insoluble matter increases, which affects the use and promotion of the product

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