Acrylamide copolymer as well as preparation method and application of acrylamide copolymer

A technology of acrylamide series and copolymers, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of limitations, poor temperature resistance and shear resistance of polyacrylamide jelly, and achieve the preparation method Simple, good high temperature shear resistance, mild reaction conditions

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

However, there are still some problems in the practical application of polyacrylamide jelly system, for example, the tempera

Method used

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  • Acrylamide copolymer as well as preparation method and application of acrylamide copolymer
  • Acrylamide copolymer as well as preparation method and application of acrylamide copolymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] This example is used to illustrate the acrylamide copolymer and its preparation method.

[0058] 22.27g of acrylamide (AM), 9.27g of 2-acrylamide-2-methylpropanesulfonic acid (AMPS) and 18.46g of N-methylolpropanesulfonic acid (AMPS) were sequentially added to a 250mL reactor under cooling at 0°C Add 180g of water to NMAM, stir to dissolve the monomer completely, and obtain an aqueous solution of the monomer mixture. Adjust the pH to 5.5 with sodium hydroxide solution 2 After bubbling for 30 minutes, add 0.01 g of 2,2'-azobis(2-amidinopropane) dihydrochloride (V50), 0.005 g of ammonium persulfate (APS) and 0.0027 g of sodium bisulfite in sequence, The reaction mixture was polymerized at 20° C. for 1 hour, and then the reaction mixture was heated to 60° C. for 2 hours. The colorless transparent viscoelastic colloid P1 of the acrylamide copolymer was obtained by discharging. After the acrylamide copolymer colloid P1 was granulated, dried, pulverized and sieved, various...

Embodiment 2

[0064] This example is used to illustrate the acrylamide copolymer and its preparation method.

[0065] Under the cooling condition of 0°C, 22.24g of acrylamide, 23.15g of 2-acrylamide-2-methylpropanesulfonic acid and 4.61g of N-methylolacrylamide were successively added to a 250mL reactor, and 96.7g g of water, stirred to dissolve the monomer completely, and obtained an aqueous solution of the monomer mixture. Adjust the pH to 8.5 with sodium hydroxide solution. Pass N 2 After bubbling for 30 minutes, 0.01 g of 2,2'-azobis(2-amidinopropane) dihydrochloride (V50), 0.006 g of ammonium persulfate and 0.0027 g of sodium bisulfite were sequentially added to make the reaction mixture The reaction was carried out at 8° C. for 3 hours, and then the reaction mixture was heated to 70° C. for 1 hour. The colorless transparent viscoelastic colloid P2 of the acrylamide copolymer was obtained by discharging. After the acrylamide copolymer colloid P2 was granulated, dried, pulverized an...

Embodiment 3

[0069] This example is used to illustrate the acrylamide copolymer and its preparation method.

[0070] Under cooling conditions at 0°C, 23.1g of acrylamide, 5.60g of 2-acrylamide-2-methylpropanesulfonic acid and 19.11g of N-methylolacrylamide were sequentially added to a 250mL reactor, and 120g of water, stirring to completely dissolve the monomers to obtain an aqueous solution of the monomer mixture. Adjust the pH to 7.5 with sodium hydroxide solution. Pass N 2 After bubbling for 30 minutes, 0.012 g of 2,2'-azobis(2-amidinopropane) dihydrochloride (V50), 0.005 g of ammonium persulfate and 0.027 g of sodium bisulfite were successively added to make the reaction mixture The polymerization reaction was carried out at 10° C. for 2 hours, and then the reaction mixture was heated to 40° C. for 2 hours. The colorless and transparent viscoelastic colloid P3 of the acrylamide copolymer was obtained by discharging. After the acrylamide copolymer colloid P3 was granulated, dried, p...

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Abstract

The invention discloses an acrylamide copolymer as well as a preparation method and application of the acrylamide copolymer. The acrylamide copolymer contains a structural unit A, a structural unit B and a structural unit C, wherein the structural unit A is as shown in the formula (1) and/or the formula (2); the structural unit B is as shown in the formula (3) and/or the formula (4); the structural unit C is as shown in the formula (5) and/or the formula (6); and the viscosity-average molecular weight of the acrylamide copolymer ranges from one million to ten millions. The acrylamide copolymer disclosed by the invention has favorable thickening performance under the conditions of high temperature and high salt content; and gel formed after crosslinking of the acrylamide copolymer is good in temperature resistance and shearing resistance.

Description

technical field [0001] The invention relates to an acrylamide copolymer, a preparation method of the acrylamide copolymer, an acrylamide copolymer prepared by the method, and an application of the acrylamide copolymer as a thickener. Background technique [0002] As the focus of world energy development shifts to unconventional oil and gas resources, hydraulic fracturing technology, as a key technology for the development of unconventional resources such as tight sandstone oil and gas, coalbed methane and shale oil and gas, has been highly valued. The low-damage, low-cost water-based fracturing fluid system has become a research and development hotspot as a key link to ensure the success of fracturing construction and increase production efficiency. Major international oil companies have invested a lot of manpower and material resources in the research and development of new fracturing fluid systems. Field Test. [0003] Water-based fracturing fluid is composed of polymer t...

Claims

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Application Information

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IPC IPC(8): C08F220/56C08F220/58C09K8/68
Inventor 林蔚然黄凤兴伊卓杜凯张文龙祝纶宇赵方园刘希方昭
Owner CHINA PETROLEUM & CHEM CORP
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