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Preparation method of temperature-resistant anti-salt anti-shearing nano-polymer

A nano-polymer, temperature-resistant and salt-resistant technology, applied in the field of water-soluble polymer synthesis, can solve the problems of low molecular weight of branched polymers, difficult to apply in a wide range, difficult to apply on a large scale, etc., and achieves high molecular weight, product post-processing Simple, easy-to-store effects

Inactive Publication Date: 2014-03-05
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, a lot of work has been done in the field of using polyhydroxyl compounds as branching center reactions to obtain branched polymers, but most of them remain at the level of theoretical research. Generally, the molecular weight is low and the viscosity is not high, so it is difficult to apply on a large scale in oil field flooding.
[0005] In 2008, Ray Gunawidjaja and others synthesized a branched amphiphile centered on oligomeric polyhedral silsesquioxane (POSS) containing multiple terminal hydroxyl groups. They used the multiple hydroxyl groups contained on the polymer to react with isocyanate to obtain A branched polymer with a high degree of branching and good interfacial self-assembly properties, but because the molecular weight of the synthesized branched polymer is generally low (less than 30,000), although its research has good cross-sectional properties, it is difficult to apply it in practice. Large-scale application in production
However, the inherent viscosity of this type of polymer is generally less than 1dL / g, and its molecular weight does not exceed 100,000, so it is difficult to be widely used in oil recovery that has a strong dependence on viscosity

Method used

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  • Preparation method of temperature-resistant anti-salt anti-shearing nano-polymer

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Embodiment 1

[0046] A method for preparing a temperature-resistant, salt-resistant and shear-resistant nanopolymer, comprising the following steps:

[0047] (1) Measure 50ml of water and add it to a four-necked bottle equipped with a stirrer, nitrogen pipe, vent pipe and thermometer, weigh 1.4419g of sodium lauryl sulfate into the water, and stir at room temperature until completely dissolved to form a stable emulsion;

[0048] (2) Add 1.4216g monomeric acrylamide and 1.295g monomeric 2-acrylamido-2-methylpropanesulfonic acid to the emulsion prepared in step (1), stir at room temperature until completely dissolved; weigh 0.05g A171 Add nano-silica to the above mixing system, and stir until dissolved at room temperature;

[0049] (3) Use sodium hydroxide and hydrochloric acid to adjust the pH of the system prepared in step (2) to 7.5; use a pipette to measure 60 μl of ammonium persulfate solution with a concentration of 1mol / L and add it to the above mixture, stir and dissolve The bottle i...

Embodiment 2

[0057] As described in Example 1, the difference is that in step (2) the amount of A171 nano-silica added is changed to 0.10 g to obtain 1.384 g of temperature-resistant, salt-resistant and shear-resistant nanopolymerization, which is denoted as NP-2. The molecular weight is 4.73×10 6 g / mol.

Embodiment 3

[0059] As described in Example 1, the difference is that in step (2) the amount of A171 nano-silica added is changed to 0.15g, and 1.274g of temperature-resistant, salt-resistant, and shear-resistant nanopolymerization is obtained, which is denoted as NP-3. The molecular weight is 4.28×10 6 g / mol.

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Abstract

The invention relates to a preparation method of a temperature-resistant anti-salt anti-shearing nano-polymer. The nano-polymer is obtained by adopting an emulsion polymerization method, and taking water as a solvent, sodium dodecyl sulfate as an emulsifying agent, an ammonium sulfate and tetramethylethylenediamine redox system as an initiating agent, and multi-vinyl modified nano silicon dioxide as a core to copolymerize with monomer acrylamide and 2-acrylamide-2-methylacrylsulfonate at certain temperature and pH value. The synthetic reaction is mild in condition, easily-available in raw material, low in cost, high in monomer conversion rate and convenient in product treatment, and the obtained nano polymer has good temperature resistance, salt resistance and shear resistance compared with a linear polymer. The preparation method can be widely applied to the fields of oilfield development and the like.

Description

technical field [0001] The invention relates to a preparation method of a temperature-resistant, salt-resistant and shear-resistant nanometer polymer, which belongs to the technical field of water-soluble polymer synthesis. Background technique [0002] In order to improve the temperature and shear resistance of polymers and meet the increasingly harsh reservoir conditions for polymer flooding, composite flooding and other production stimulation measures (such as water shutoff, profile control and deep liquid flow diversion technology, etc.), domestic Polymers have been extensively explored. At present, the research on new polymers for oil displacement has made great progress, and various types of associative polymers, branched polymers, zwitterionic polymers and nanopolymers with "reverse polyelectrolyte effect" have been developed. polymers, and have been put into oilfield production applications. Among them, the use of nano-polymers for oil flooding has high potential a...

Claims

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Application Information

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IPC IPC(8): C08F292/00C08F220/56C08F220/58C08F2/26C08F4/40
Inventor 谭业邦辛海鹏王小金
Owner SHANDONG UNIV
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