A kind of polymer with surface active function and its preparation method and application

A functional polymer and surface active technology, applied in the direction of drilling compositions, chemical instruments and methods, etc., to achieve enhanced oil recovery, good cationic precipitation resistance and temperature resistance, and solve the problem of temperature resistance and resistance to high inorganic prices The effect of poor cationic performance

Active Publication Date: 2016-08-17
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • 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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  • A kind of polymer with surface active function and its preparation method and application
  • A kind of polymer with surface active function and its preparation method and application
  • A kind of polymer with surface active function and its preparation method and application

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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 to 5, more preferably 1 to 3, and more preferably the alkylene group is a methylene group or an ethylene group.

[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. -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 to 11 million.

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

Embodiment 1

[0076] Using the aqueous solution polymerization method, add 6.25g of the structural monomer shown in formula (18) (Dashiqiao Hongda Chemical Factory, the product model is SE-10) as a water-soluble surface-active monomer, 37.5g into a 400mL polymerization reaction flask Acrylamide, 18.75g 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 flask The solution becomes a clear solution. Then add 25mg auxiliary urea, 75mg disodium ethylenediaminetetraacetate, 1mL ammonia and 30mg isopropanol, and adjust the pH value of the system to 7.5 with sodium hydroxide at the same time, put the reactor in a water bath, and pass the volume concentration to 99.99 % High-purity nitrogen for 30 minutes to remove oxygen in the polymerization reaction flask. Then add 20mg ammonium persulfate and 10mg sodium bisulfite successively, ...

Embodiment 2

[0079] Using the aqueous solution polymerization method, in a 400mL polymerization reaction flask, add 5g of the structural monomer shown in formula (17) (Dashiqiao Hongda Chemical Factory, the 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 flask The solution becomes a clear solution. Then add 25mg auxiliary urea, 75mg disodium ethylenediaminetetraacetate and 2mL ammonia water, and adjust the pH value of the system to 8 with sodium hydroxide at the same time, place the reactor in a water bath, and pass in high-purity nitrogen with a volume concentration of 99.99% 30 minutes to remove oxygen in the polymerization reaction flask. Then, 15 mg of ammonium persulfate and 15 mg of sodium bisulfite were added in sequ...

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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 method for preparing the polymer with surface active function, a polymer with surface active function prepared by the method, and the use of the polymer with surface active function as an oil-displacing agent application. Background technique [0002] Exploration data in recent years show that low- and medium-permeability reservoirs have become an important area of ​​exploration and development in my country's oilfields. For example, in the Jiangsu Oilfield, among the discovered reserves, the low- and medium-permeability reserves have reached 65%. Daqing Oilfield performs polymer flooding in low- and medium-permeability reservoirs in the Sabei area, and has achieved better oil-increasing and precipitation effects. With the increase in the degree of exploration and the continuous increase in demand for oil resources, both in terms of remaining oil resources and development trend anal...

Claims

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Application Information

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Patent Type & Authority Patents(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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