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Oil-displacing composition and preparation method thereof

A composition and oil displacement technology, which are applied in the directions of drilling compositions, chemical instruments and methods, can solve the problems of poor temperature and salt resistance, low use concentration and high oil displacement efficiency, and achieve improved temperature and salt resistance. performance effect

Active Publication Date: 2012-05-23
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] One of the technical problems to be solved by the present invention is that the existing composition for oil displacement has the problems of poor temperature resistance and salt resistance and low oil displacement efficiency. A kind of composition for oil displacement is provided. The composition for oil displacement has a concentration of Low, high displacement efficiency under high temperature and high salinity conditions

Method used

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  • Oil-displacing composition and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Add 125g of acrylamide (AM) into 350g of deionized water, stir and dissolve evenly, adjust the pH value to 8 with 5% NaOH solution, add 0.125g of carbon nanotubes, ultrasonically control the temperature of the water bath to 15°C, and pass Into high-purity nitrogen, ultrasonic nitrogen 30min, followed by adding 1.25% N,N-dimethylaminoethyl methacrylate (DMAEMA) aqueous solution 1g, 1.25% potassium persulfate aqueous solution 1g, 1% sodium bisulfite aqueous solution 1g, after 1 hour, the reaction temperature was gradually increased to 40°C, and after 5 hours of reaction, a gel-like polymer product was obtained. After the gel was cut, 140g of 10% NaOH aqueous solution was added, hydrolyzed at 90°C for 2 hours, and then vacuum-dried at 75°C After 6 hours, crush and sieve with a pulverizer and take samples for analysis.

[0028] According to GB / T12005.2-89 polyacrylamide solid content determination method, the solid content is 90.5%, according to GB / T12005.8-89 powder polyac...

Embodiment 2

[0031]First add 125g of acrylamide (AM) into 370g of deionized water, stir and dissolve evenly, adjust the pH value to 8 with 5% NaOH solution, add 0.125g of nano-zinc oxide, ultrasonically control the temperature of the water bath to 15°C, and simultaneously Feed high-purity nitrogen gas, after ultrasonic nitrogen passing for 30min, add 1.25% β-dimethylaminopropionitrile aqueous solution 1g, 1.25% sodium persulfate aqueous solution 1g, 1.69% potassium sulfite aqueous solution 1g, after 1 hour, the reaction temperature Gradually rise to 40°C, react for 5 hours to obtain a gel-like polymer product, add 140g of 10% NaOH aqueous solution after cutting the gel, hydrolyze at 90°C for 2 hours, then vacuum dry at 75°C for 6 hours, crush the sieve with a pulverizer Sampling after analysis.

[0032] According to GB / T12005.2-89 polyacrylamide solid content determination method, the solid content is 89.9%. 6-89 Method for Determination of Degree of Hydrolysis of Partially Hydrolyzed Pol...

Embodiment 3

[0035] First add 125g of acrylamide (AM) into 370g of deionized water, stir and dissolve evenly, adjust the pH value to 8 with 5% NaOH solution, add 0.125g of carbon nanotubes, ultrasonically control the temperature of the water bath to 15°C, and simultaneously Introduce high-purity nitrogen, and ultrasonically pass nitrogen for 30 minutes, then add 1.25% N,N-dimethylaminoethyl methacrylate (DMAEMA) aqueous solution 1g, 1.25% ammonium persulfate aqueous solution 1g, 2.63% potassium bisulfite 1g of aqueous solution, and the reaction temperature was gradually raised to 40°C after 1 hour, and a gel-like polymer product was obtained after 5 hours of reaction. After cutting the gel, 140g of 10% NaOH aqueous solution was added, and the reaction was hydrolyzed at 90°C for 2 hours, and then vacuumed at 75°C Dry for 6 hours, crush and sieve with a pulverizer, and then take samples for analysis.

[0036] According to GB / T12005.2-89 polyacrylamide solid content determination method, the ...

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Abstract

The invention relates to an oil-displacing composition and a preparation method thereof, which mainly solve the problems in the prior art that the oil-displacing agent comprising polymer has poor temperature resistance, poor salt resistance and low oil displacement efficiency. The oil-displacing composition comprises the following ingredients by weight percent: (1) 0.01 to 3 percent of oil-displacing inorganic nanocomposite polyacrylamide, (2) 0.01 to 5 percent of fatty alcohol polyoxyethylene ether carboxylate surface active agent and (3) 92 to 99.98 percent of oil field injection water, wherein the ingredient (1), i.e. the oil-displacing inorganic nanocomposite polyacrylamide comprises the following ingredients in parts by weight: a) 1 to 10 parts of inorganic nanometer material which is selected from carbon nano pipes, nano zinc oxide, nano silicon oxide or nano titanium oxide, and b) 90 to 99 parts of polyacrylamide; and the molecular formula of the ingredient (2) is RO(CH2CH2O)nCH2COOM, wherein in the formula: R is alkyl of C12 to C18, n is an adding number of ethoxy group EO and is an integer of 2 to 8. The oil-displacing composition can well solve the problems and can be used in the tertiary recovery of an oil field.

Description

technical field [0001] The invention relates to a composition for oil displacement and a preparation method thereof. Background technique [0002] Petroleum is an important energy and chemical raw material, as well as an important strategic material of the country, which has a decisive impact on the development of the national economy and is known as "industrial blood". Petroleum, as a non-renewable fossil energy, is currently the most important energy used, and the proportion of consumption in total energy is increasing year by year. Oil recovery is not only the oil industry, but also the general concern of the whole society. At present, the problems faced by oil exploitation are firstly, the contradiction between supply and demand is prominent, the demand for oil is bigger and bigger, and there are fewer and fewer new oil fields; 10-25% of underground crude oil can be recovered in primary oil recovery, and 15-25% of underground crude oil can be recovered in secondary oil...

Claims

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Application Information

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IPC IPC(8): C09K8/588C08F120/56C08K3/22C08K7/00C08K3/04C08K3/34
Inventor 蔡红夏燕敏宋晓芳陈安猛
Owner CHINA PETROLEUM & CHEM CORP
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