Method for improving polymer flooding effect, and polymer flooding composition and application thereof

Method for improving polymer flooding effect, and polymer flooding composition and application thereof

  • CN 106,350,049 A
  • Filed: 07/29/2016
  • Published: 01/25/2017
  • Est. Priority Date: 07/29/2016
  • Status: Active Application
First Claim
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1. a kind of method improving polymer polymer flooding effect, methods described include poly- drive during by nucleocapsid microgel be polymerizedThing presses the volume ratio injection of 1:

  • 100~

    1;

    1, and described nucleocapsid microgel is by water solublity neutral monomer acrylamide and ion listBody i and cross-linking agent copolymer group nucleation portion, wherein acrylamide monomer are 1;

    20~

    30;

    1 with the mass ratio of ion monomer i,Cross-linked dosage is 0.0001~

    15wt% of nuclear monomer gross mass;

    By water solublity neutral monomer acrylamide and ion monomer ii andCross-linking agent copolymer constitutes shell parts, and wherein acrylamide monomer and the mass ratio of ion monomer ii are 1;

    20~

    30;

    1, crosslinkedDosage is 0.0001~

    15wt% of shell monomer gross mass;

    Ion monomer i and ion monomer ii has opposite charges;

    Described ion monomer i is selected from beta-amido ethylacrylic acid hydrochlorate, beta-amido ethylacrylic acid sulfate, methacrylOxy-ethyl-trimethyl salmiac, n, n- dimethylamino ethyl acrylic acid hydrochloride, n, n- dimethylamino ethyl acrylic acid sulfate,Beta-amido ethyl methacrylate sulfate, allyl amine salt, allyl alkyl salt, (methyl) acrylate quaternary amine, methylAt least one in the group that acryloxyethyldimethyl butylammonium bromide is formed;

    Described ion monomer ii be selected from acrylic acid or acrylates, methacrylic acid or methacrylate, 2- acrylamido-At least one in the group that 2- methyl propane sulfonic acid salt, alpha-alkene sulfonate, β

    -allylsulfonate are formed.

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