Terpolymer used for resisting temperature and displacing oil and preparation method thereof

A technology of terpolymer and acrylamide copolymer, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problem of less research on hydrophobic monomers

Active Publication Date: 2014-12-24
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the main research hotspot hydrophobic monomers are surface active monomers, fluorocarbon monomers and

Method used

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  • Terpolymer used for resisting temperature and displacing oil and preparation method thereof
  • Terpolymer used for resisting temperature and displacing oil and preparation method thereof
  • Terpolymer used for resisting temperature and displacing oil and preparation method thereof

Examples

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Example Embodiment

[0058] The present invention also provides a preparation method for the temperature-resistant oil displacement terpolymer, comprising the following steps:

[0059] Step 1: Weigh acrylamide, sulfonic acid monomer and hydrophobic monomer into the polymerization bottle to form an aqueous solution, adjust the pH value of the aqueous solution to 6-10 with alkali, for example, adjust the pH value of the aqueous solution to 6, 7, 8, 9 or 10, then add complexing agent and urea aqueous solution in this aqueous solution, stir;

[0060] The sulfonic acid monomer is 2-acrylamido-2-methylpropanesulfonic acid;

[0061] The hydrophobic monomer is one of the compounds shown in formula (2):

[0062]

[0063] (2)

[0064] (2) In the formula: n is 1 to 4;

[0065] The total mass concentration of the above-mentioned acrylamide, sulfonic acid monomer and hydrophobic monomer in the aqueous solution is 10% to 40%, and every increment or decrement of 1% or 0.5% within the value range can be used ...

Example Embodiment

[0082] Example 1

[0083] 1. Mix 12.0g acrylamide (60% by mass), 7.9g 2-acrylamido-2-methylpropanesulfonic acid (39.5% by mass) and 0.1g hydrophobic monomer (n=1, mass ratio is 0.5%) into the polymerization reaction bottle (that is, the polymerization bottle), add 50.0 g of deionized water to dissolve and make an aqueous solution, then add sodium hydroxide to adjust the pH to 8.9, and then add 1.0 g of 1% EDTA-2Na aqueous solution, 1 % urea aqueous solution 0.5g, stir well;

[0084] 2. Add 0.5g of sodium lauryl sulfate to the polymerization bottle, stir and emulsify to obtain an emulsion;

[0085] 3. Put the polymerization reaction bottle in a constant temperature water bath, blow nitrogen to drive oxygen for 30 minutes, then add 4.0g of 0.1% potassium persulfate aqueous solution and 2.0g of 0.1% sodium bisulfite aqueous solution, initiate the reaction at 10°C, continue Nitrogen was passed to stop after five minutes, and under the protection of nitrogen, the polymerization r...

Example Embodiment

[0089] Example 2

[0090] 1. Mix 9.95g acrylamide (mass ratio: 49.75%), 10.0g 2-acrylamido-2-methylpropanesulfonic acid (mass ratio: 50%) and 0.05g hydrophobic monomer (n=2, mass ratio: 0.25%) into the polymerization reaction bottle, add 50.0g of deionized water to dissolve and make an aqueous solution, then add sodium hydroxide to adjust the pH to 8.0, then add 1.0g of 1% EDTA-2Na aqueous solution and 1.0% of urea aqueous solution in sequence g, stir evenly;

[0091] 2. Add 0.5g sodium dodecylbenzene sulfonate to the polymerization bottle, stir and emulsify fully to obtain an emulsion;

[0092] 3. Put the polymerization reaction bottle in a constant temperature water bath, and after passing nitrogen to drive oxygen for 30 minutes, add 5.0 g of 0.1% ammonium persulfate aqueous solution and 2.0 g of 0.1% potassium bisulfite aqueous solution, initiate the reaction at 11°C, and continue to pass The nitrogen was stopped after five minutes, and under the protection of nitrogen, t...

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Abstract

The invention relates to a terpolymer used for resisting temperature and displacing oil and a preparation method thereof, the method comprises the following steps: introducing a hydrophobic monomer containing triphenyl in an acrylamide copolymer, preparing acrylamide, a sulfonic acid monomer and a hydrophobic monomer to obtain an aqueous solution, adding a complexing agent and an urea aqueous solution, then adding an emulsifier to prepare an emulsion, adding an initiator in the emulsion, polymerizing to obtain a rubber block, removing the rubber block, cutting, granulating, crushing, and sieving to obtain the terpolymer finished product. According to the terpolymer and the preparation method, the hydrophobic monomer containing triphenyl is introduced in a macromolecular chain, and thereby the viscosifying capacity and heatproof performance of the polymer can be increased.

Description

technical field [0001] The invention relates to the research field of water-soluble polymers and oil-displacement polymers to enhance oil recovery, in particular to a temperature-resistant oil-displacement terpolymer and a preparation method thereof. Especially the acrylamide terpolymer for oil displacement and its preparation method. Background technique [0002] The polymer used for oil displacement (also known as polymer oil displacement agent) should have excellent performance, good water solubility, strong viscosity increase, can adapt to the environmental conditions injected into the oil layer (such as oil layer temperature and salinity), and is not easy to degrade. Good anti-aging properties. In addition, due to the large amount of polymer oil-displacement agents consumed in oil production, low production costs and easy availability of raw materials are important criteria for screening polymer oil-displacement agents. Generally, polymer oil displacement agents are d...

Claims

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Application Information

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IPC IPC(8): C08F220/56C08F220/58C08F212/32C08F2/26C08F4/40C09K8/588
Inventor 赵方园伊卓刘希
Owner CHINA PETROLEUM & CHEM CORP
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