Functional polymer with surface activity as well as preparation method and application thereof

A functional polymer and surface active technology, applied in drilling compositions, chemical instruments and methods, etc., to solve the problem of poor temperature resistance and resistance to inorganic high-valent cations, good resistance to cationic precipitation and temperature resistance, and improve crude oil. The effect of recovery

Active Publication Date: 2015-06-10
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
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  • Application Information

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Problems solved by technology

[0009] The purpose of the present invention is to overcome the shortcomings that the current polymers used in medium and low permeability reservoirs cannot have good surface activity, thickening water medium ability and temperature resistance and salt resistance, and provide a kind of polymer with good surface activity, thickening and anti-salt ability A polymer with surface active function capable of water medium and temperature resistance and salt resistance, a preparation method of the polymer with surface active function, a polymer with surface active function prepared by the method, and the polymer with surface active function Application as an oil displacing agent

Method used

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  • Functional polymer with surface activity as well as preparation method and application thereof
  • Functional polymer with surface activity as well as preparation method and application thereof
  • Functional polymer with surface activity as well as preparation method and application thereof

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Embodiment approach

[0034] According to a preferred embodiment of the present invention, the aryl group in the alkylaryl group is a substituted or unsubstituted phenyl group.

[0035] The number of carbon atoms of the alkylene group in the phenoxyalkylene group is preferably 1-5, more preferably 1-3, and more preferably the alkylene group is methylene or ethylene.

[0036] According to the present invention, in the polymer with surface active function, based on the weight of the polymer with surface active function, the content of structural unit A is preferably 60-75% by weight, and the content of structural unit B is preferably 20% by weight. -35% by weight, the content of structural unit C is preferably 5-10% by weight, and the viscosity-average molecular weight of the surface-active functional polymer is preferably 6 million-11 million.

[0037] According to the present invention, the intrinsic viscosity η of the surface-active functional polymer is preferably 1250-2200mL / g, and when the conc...

Embodiment 1

[0076] Using the aqueous solution polymerization method, add 6.25g of the structural monomer shown in formula (18) (Dashiqiao Hongda Chemical Factory, product model is SE-10) into a 400mL polymerization reaction bottle as a water-soluble surface active monomer, 37.5g Acrylamide, 18.75 g of 2-acrylamido-2-methylpropanesulfonic acid and distilled water, based on the total content of monomers and distilled water, the total content of monomers is 25% by weight, fully stirred into the polymerization reaction bottle The solution turned into a transparent solution. Then add 25 mg of auxiliary agent urea, 75 mg of disodium ethylenediamine tetraacetate, 1 mL of ammonia water and 30 mg of isopropanol, and at the same time adjust the pH value of the system to 7.5 with sodium hydroxide, place the reactor in a water bath, and feed it with a volume concentration of 99.99 % high-purity nitrogen for 30 minutes to remove the oxygen in the polymerization flask. Then add 20 mg of ammonium persu...

Embodiment 2

[0079] Using the aqueous solution polymerization method, in a 400mL polymerization reaction bottle, add 5g of the structural monomer shown in formula (17) (Dashiqiao Hongda Chemical Factory, product model is ME-10) as a water-soluble surface active monomer, 41.875g Acrylamide and 15.625g of 2-acrylamido-2-methylpropanesulfonic acid and distilled water, based on the total content of monomers and distilled water, the total content of monomers is 25% by weight, fully stirred into the polymerization reaction bottle The solution turned into a transparent solution. Then add 25mg of auxiliary urea, 75mg of disodium ethylenediaminetetraacetic acid and 2mL of ammonia water, and at the same time adjust the pH value of the system to 8 with sodium hydroxide, place the reactor in a water bath, and feed high-purity nitrogen with a volume concentration of 99.99% 30 minutes to remove the oxygen in the polymerization bottle. Then add 15mg of ammonium persulfate and 15mg of sodium bisulfite su...

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Abstract

The invention provides a functional polymer with surface activity as well as a preparation method and application thereof. The functional polymer with surface activity contains a structural unit A, a structural unit B and a structural unit C, wherein the structural unit A has a structure as shown in a formula (1) in the specification; the structural unit B has a structure as shown in a formula (2) in the specification; the structural unit C has a structure as shown in a formula (3) in the specification; based on the weight of the polymer, the content of the structural unit A is 50-88wt%; the content of the structural unit B is 10-40wt%; the content of the structural unit C is 2-10wt%; the viscosity-average molecular weight of the polymer is 6-12 million. The functional polymer with surface activity has good temperature and salt resistance and a capability of thickening water media. The polymer oil displacement agent is applicable to oil reservoirs with low to medium permeability and high-temperature and high-salinity oil reservoirs and can conduce to further enhancing the oil recovery in tertiary oil recovery.

Description

technical field [0001] The present invention relates to a polymer with surface active function, a preparation method of the polymer with surface active function, a polymer with surface active function prepared by the method, and the polymer with surface active function as an oil displacement agent application. Background technique [0002] Exploration data in recent years show that medium and low permeability reservoirs have become an important field of oilfield exploration and development in my country. For example, in Jiangsu Oilfield, medium and low permeability reserves have reached 65% of the discovered reserves. Daqing Oilfield carried out polymer flooding in medium and low permeability reservoirs in the Sabei area, and achieved a good effect of increasing oil production and reducing water loss. With the improvement of the degree of exploration and the increasing demand for oil resources, no matter from the analysis of remaining oil resources or development trends, me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/56C08F220/58C08F216/14C08F2/10C09K8/584C09K8/588
Inventor 王晓春吴江勇于芳
Owner CHINA PETROLEUM & CHEM CORP
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