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Viscous-elastic particle oil-displacing agent with fluorescence characteristic and preparation method therefor

A technology of fluorescent properties and oil-displacing agents, applied in chemical instruments and methods, luminescent materials, drilling compositions, etc., can solve the problems of complex polymerization process, difficulty in obtaining, and difficulty in industrial production, and achieve simple post-processing of products , short polymerization cycle, excellent heat resistance, salt resistance and shear resistance

Inactive Publication Date: 2016-01-27
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the monomer allyl‐7‐hydroxy‐4‐methylcoumarin used in this patent is not commercialized, is not easy to obtain, and the polymerization process is relatively complicated, making industrial production difficult

Method used

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  • Viscous-elastic particle oil-displacing agent with fluorescence characteristic and preparation method therefor
  • Viscous-elastic particle oil-displacing agent with fluorescence characteristic and preparation method therefor
  • Viscous-elastic particle oil-displacing agent with fluorescence characteristic and preparation method therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Dissolve 100g of acrylamide in 260g of water to make a solution, dissolve 0.45g of dimethylaminoethyl methacrylate in 50g of water to make a solution, dissolve 0.0005g of N‐vinylcarbazole in 1g of ethanol to make a solution, and add them in turn to three necks bottle, and placed in a water bath at 20°C; after passing nitrogen gas for 20 minutes, add a solution prepared by dissolving 0.02g of potassium persulfate in 40g of water into the three-necked flask. After the temperature rise of the reaction solution is greater than 1°C, stop the nitrogen flow. After the reaction, put the three-neck bottle in a 75°C water bath to keep warm for 5 hours, then take out the gel, cut it into pieces, dry, crush, and sieve it. Powdered product available.

Embodiment 2

[0022] Dissolve 100g of acrylamide in 290g of water to make a solution, dissolve 0.5g of dimethylaminoethyl methacrylate in 60g of water to make a solution, dissolve 0.0004g of N‐vinylcarbazole in 0.2g of ethanol to make a solution, add three Neck bottle, and placed in a water bath at 15 ° C; after 20 minutes of nitrogen, 0.035g of potassium persulfate dissolved in 40g of water into the three-necked bottle. After the temperature rise of the reaction solution is greater than 1°C, stop the nitrogen flow. After the reaction, put the three-neck bottle into an 80°C water bath to keep warm for 4 hours, then take out the gel, cut it into pieces, dry it, crush it, and sieve it. Powdered product available.

Embodiment 3

[0024] Dissolve 100g of acrylamide in 250g of water to make a solution, dissolve 0.3g of dimethylaminoethyl methacrylate in 40g of water to make a solution, dissolve 0.025g of N‐vinylcarbazole in 4g of ethanol to make a solution, and add three necks in sequence bottle, and placed in a water bath at 25°C; after passing through nitrogen for 20 minutes, add a solution prepared by dissolving 0.015g of potassium persulfate in 20g of water into the three-necked flask. After the temperature rise of the reaction solution is greater than 1°C, stop the nitrogen flow. After the reaction, put the three-neck bottle in a water bath at 85°C to keep warm for 3 hours, then take out the gel, cut it into pieces, dry it, crush it, and sieve it. Powdered product available.

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Abstract

The invention discloses a viscous-elastic particle oil-displacing agent with a fluorescence characteristic and a preparation method therefor. The oil-displacing agent is a terpolymer composed of three structural units: acrylamide, N-vinyl carbazole and 2-(dimethylamino)ethyl methacrylate. The preparation method is as follows: 100 parts of acrylamide is dissolved in 250-290 parts of water to prepare a solution, 0.3-0.5 part of 2-(dimethylamino)ethyl methacrylate is dissolved in 40-60 parts of water to prepare a solution, 0.0004-0.025 part of N-vinyl carbazole is dissolved in 0.2-4 parts of ethanol to prepare a solution, the solutions are added in a three-necked bottle in order, and the three-necked bottle is placed in water-bath at a temperature of 15-25 DEG C; after nitrogen input is carried out for 20min, a solution prepared after 0.015-0.035 part of potassium peroxodisulfate is dissolved in 20-40 parts of water is added into the three-necked bottle; when the temperature rise of the reaction solution is more than 1 DEG C, nitrogen input is stopped, after the reaction is finished, the three-necked bottle is placed in a water bath kettle, thermal insulation is carried out for 3-5h, then gel is taken out, cut into pieces, dried, crushed and screened, and a powdery product can be obtained.

Description

technical field [0001] The invention relates to the technical field of tertiary oil recovery, in particular to a viscoelastic particle oil-displacing agent with fluorescent properties that can enhance crude oil recovery and a preparation method thereof. Background technique [0002] The reservoir characteristics of most oilfields in my country are heterogeneous, and these oilfields have entered the development stage of high water cut or ultra-high water cut. After the traditional oil displacement agent partially hydrolyzed polyacrylamide is injected into the reservoir, it will burst along the high permeability layer or zone. Less penetration into the low-permeability layer, low swept volume of the oil displacement agent, resulting in low final oil displacement recovery, so a partially cross-linked polyacrylamide viscoelastic particle oil displacement agent containing a large number of branched chain structures has been developed (CN101775275B ). For this new type of oil displ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/588C08F220/56C08F220/34C08F226/12C09K11/06
Inventor 姜祖明李振泉曹绪龙宋新旺刘坤陈晓彦王红艳刘煜王丽娟
Owner CHINA PETROLEUM & CHEM CORP
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