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Micro-branched micro-cross-linked association polymer, preparation method and applications thereof

A technology of associative polymers and micro-crosslinking, applied in the field of polymers, can solve problems such as poor temperature and salt resistance, and achieve the effect of enhancing temperature and salt resistance and improving temperature and salt resistance

Active Publication Date: 2018-07-10
SHANDONG NUOER BIOLOGICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] Aiming at the problem of poor temperature and salt resistance existing in existing polymers that can be used as oil displacement agents, the present invention provides a method for preparing micro-branched and micro-crosslinked associative polymers. The polymer prepared by the method has Micro-branched structure, micro-crosslinked structure, hydrophobic association structure, and its aqueous solution has a spatial network structure, which can enhance the temperature and salt resistance of the polymer, and still have a high viscosity under high temperature and high salinity conditions

Method used

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  • Micro-branched micro-cross-linked association polymer, preparation method and applications thereof

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[0042] The invention provides a preparation method of a micro-branched micro-crosslinked associative polymer. The preparation raw materials include the following components: 170-200 parts by weight of acrylamide, 10-20 parts by weight of acrylic acid, 2-acrylamide-2-methanol 40-60 parts by weight of propanesulfonic acid, 2-6 parts by weight of rigid monomer, 0.5-1 part by weight of branched monomer, 1-3 parts by weight of hydrophobic monomer, 0.5-2 parts by weight of surfactant, 680-763 parts by weight of solvent parts by weight, 13-23 parts by weight of sodium hydroxide, 0.005-0.025 parts by weight of chain transfer agent, 0.01-0.05 parts by weight of chelating agent and 0.001-0.5 parts by weight of initiator. Described preparation method comprises the steps:

[0043](1) Initial mix: mix acrylamide, acrylic acid, 2-acrylamide-2-methylpropanesulfonic acid, rigid monomer, branched monomer, hydrophobic monomer, surfactant and solvent. Wherein, the rigid monomer is selected from...

Embodiment 1

[0052] The preparation raw materials include the following components: 170 parts by weight of acrylamide, 10 parts by weight of acrylic acid, 40 parts by weight of 2-acrylamide-2-methylpropanesulfonic acid, 2 parts by weight of N-vinylpyrrolidone, ethylene glycol dimethacrylate 0.5 parts by weight of ester, 2 parts by weight of octadecyldimethylallyl ammonium chloride, 1.5 parts by weight of butane-1,4-di(tetradecyldimethylammonium bromide), 13 parts by weight of sodium hydroxide Parts by weight, 761 parts by weight of deionized water, 0.01 parts by weight of sodium formate, 0.03 parts by weight of disodium edetate, 0.35 parts by weight of azobisisobutylamidine dihydrochloride, 0.02 parts by weight of potassium persulfate and hydrogen sulfite 0.015 parts by weight of sodium.

[0053] The preparation method comprises the following steps:

[0054] Add acrylamide, acrylic acid, octadecyldimethylallyl ammonium chloride, 2-acrylamide-2-methylpropanesulfonic acid, N-vinylpyrrolidon...

Embodiment 2

[0058] The preparation raw materials include the following components: 190 parts by weight of acrylamide, 15 parts by weight of acrylic acid, 50 parts by weight of 2-acrylamide-2-methylpropanesulfonic acid, 4 parts by weight of N-vinylpyrrolidone, dimethylaminoethyl methacrylate 0.7 parts by weight of ester, 2.5 parts by weight of N-dodecylacrylamide, 2 parts by weight of butane-1,4-di(tetradecyldimethylammonium bromide), 18 parts by weight of sodium hydroxide, deionized 718 parts by weight of water, 0.012 parts by weight of sodium formate, 0.02 parts by weight of trisodium N-hydroxyethylethylamine triacetate, 0.3 parts by weight of azobisisobutylamidine dihydrochloride, 0.02 parts by weight of potassium persulfate and sodium bisulfite 0.015 parts by weight.

[0059] The preparation method comprises the following steps:

[0060] Add acrylamide, acrylic acid, N-dodecylacrylamide, 2-acrylamide-2-methylpropanesulfonic acid, N-vinylpyrrolidone, dimethylaminoethyl methacrylate, bu...

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Abstract

The invention relates to a micro-branched micro-cross-linked association polymer, a preparation method and applications thereof. The preparation method comprises: (1) carrying out initial mixing: mixing acrylamide, acrylic acid, 2-acrylamide-2-methyl propanesulfonic acid, a rigid monomer, a branched monomer, a hydrophobic monomer, a surfactant and a solvent, wherein the rigid monomer is any one ora variety of materials selected from N-vinylpyrrolidone, styrene and sodium p-styrenesulfonate, the branched monomer is ethylene dimethacrylate and / or 2-(dimethylamino)ethyl methacrylate, and the hydrophobic monomer is any one or a variety of materials selected from N,N-di-n-octyl acrylamide, N-dodecyl acrylamide and octadecyl dimethylallyl ammonium chloride; (2) adjusting the pH value by addingan alkali; (3) adding an auxiliary agent; and (4) polymerizing: adding an initiator to the mixed solution treated in the step (3), and initiating a polymerization reaction so as to obtain the micro-branched micro-cross-linked association polymer, wherein the obtained micro-branched micro-cross-linked association polymer has excellent temperature resistance and excellent salt resistance.

Description

technical field [0001] The invention relates to the technical field of polymers, in particular to a micro-branched micro-crosslinked associative polymer, a preparation method and an application. Background technique [0002] Since the end of the last century, the main oil fields in my country have widely used chemical flooding with polyacrylamide as the main component to enhance oil recovery. Every ton of polymer injected can increase the crude oil production by more than 100 tons. Polyacrylamide with different molecular weights is a chemical flooding aid widely used in major oilfields across the country. It has been widely used in the field of tertiary oil recovery in my country and has played an important role in the stable and increased production of oilfields. [0003] As the recoverable reserves of Type I and II reservoirs suitable for chemical flooding decrease, Type III high-temperature and high-salt reservoirs will be the main replacement resources for increasing res...

Claims

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Application Information

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IPC IPC(8): C08F220/56C08F220/06C08F220/58C08F226/10C08F222/14C08F226/02C08F212/14C08F220/34C08F220/54C08F212/08C08F2/28C08F2/38
CPCC08F2/28C08F2/38C08F220/56C08F222/102C08F226/02C08F220/06C08F220/585C08F226/10C08F212/08C08F220/54C08F212/14C08F220/34Y02A20/204
Inventor 荣敏杰孙建波许永升于庆华荣帅帅
Owner SHANDONG NUOER BIOLOGICAL TECH
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