Resin microsphere plugging agent and preparation method therefor

Abstract

The invention relates to a resin microsphere plugging agent and a preparation method therefor. The resin microsphere plugging agent is prepared from the following ingredients in parts by mass: 30-60 parts of alkene monomer, 5-40 parts of ester monomer, 5-10 parts of functional monomer, 0.1-1 part of organic dispersant, 0.3-0.5 part of inorganic dispersant, 0.6-1 part of oil-soluble initiator and 80-120 parts of distilled water. The resin microsphere plugging agent is obtained through adding the organic dispersant and the inorganic dispersant into deionized water, carrying out heating, stirringand mixing, adding the oil-soluble initiator into a mixture of the alkene monomer, the ester monomer and the functional monomer, dissolving the oil-soluble initiator, mixing all the ingredients, carrying out a polymerization reaction so as to obtain a dispersion solution of different particle sizes, and carrying out stirring to cool the dispersion solution to room temperature. According to the resin microsphere plugging agent and the preparation method therefor, the technological operations are simple, and prepared resin microspheres have the advantages of uniform particle size, easy-controlled reaction temperature, high yield, good stability, good flexibility, good transparency, good heat resistance and difficulty in degradation.

Description

technical field [0001] The invention belongs to the field of oil field chemistry, and in particular relates to a resin microsphere plugging agent and a preparation method thereof. Background technique [0002] In the initial stage of the development of oil recovery technology in my country, water injection was mostly used for development. As the production time of oil wells increased, most of the oil wells became high water-cut oil wells, and the oil wells were affected by long-term water injection, which changed the physical properties of underground oil reservoirs and formation pores. , Under the water injection pressure, the formation pores and fractures between the production well and the water injection well become larger, and the permeability increases, so that the water flooding swept volume and recovery factor are greatly reduced, and the crude oil production is significantly affected. Traditional polymer, gel and other types of plugging agents have defects such as hi...

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Problems solved by technology

[0002] In the initial stage of the development of oil recovery technology in my country, water injection was mostly used for development. As the production time of oil wells increased, most of the oil wells became high water-cut oil wells, and the oil wells were affected by long-term water injection, which changed the physical properties of underground oil reservoirs and formation pores. , Under the water injection pressure, the formation pores and fractures between the production well and the water injection well become larger, and the permeability increases, so the water flooding swept volume and recovery factor are greatly reduced, and the crude oil production is significantly affected

Traditional polymer, gel and other types of plugging agents have defects such as high injection pressure, low plugging rate, fast degradation speed, and excessive viscosity when implementing profile control and water plugging operations for low-permeability formations

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