Acrylamide copolymer and preparation method and application thereof

A technology of acrylamide copolymer and acrylamide copolymerization, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of poor temperature resistance and salt resistance, and achieve the goal of improving hydrolysis resistance and salt resistance Effect

Active Publication Date: 2015-03-25
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the defects of poor heat-resistant and salt-resistant properties of polymer oil displacement agents in the prior art, and provide a kind of acrylamide copolymer with good temperature-resistant and salt-resistant properties and its preparation method and application

Method used

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  • Acrylamide copolymer and preparation method and application thereof
  • Acrylamide copolymer and preparation method and application thereof
  • Acrylamide copolymer and preparation method and application thereof

Examples

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Embodiment 1

[0058] This embodiment is used to illustrate the acrylamide copolymer provided by the present invention and its preparation method

[0059] Add 927.09 kg of acrylamide (AM) and 1079.26 kg of acrylamide monomer C (among them, M 1 and M 2 Same, each is sodium), 8025.4 kg of deionized water, under stirring, control the temperature of the solution with frozen brine to -7°C, and add sodium hydroxide to adjust the pH to 5. Pump the monomer solution into the polymerization tank, add 20.06 grams of water-soluble azo initiator 2,2'-azo(2-amidinopropane) dihydrochloride and reducing agent N,N,N',N' - 20.06 grams of tetramethylethylenediamine, deoxygenated by passing high-purity nitrogen gas for 0.5 hours, adding 20.06 grams of sodium bisulfite and 20.06 grams of ammonium persulfate, continuing to pass nitrogen until the thermocouple in the polymerization kettle starts to heat up, and the reaction time is 8 hours. Open the ball valve at the bottom of the reactor, press out the obtained...

Embodiment 2

[0061] Add 1108.85 kilograms of AM and 145.2 kilograms of acrylamide monomer C (wherein, M 1 and M 2 Same, each is potassium), 2926.11 kg of deionized water, under stirring state, control the temperature of the solution with refrigerated brine to 15°C, and add sodium hydroxide to adjust the pH to 10. Pump the monomer solution into the polymerization tank, add 627.03 grams of water-soluble azo initiator 2,2'-azo(2-amidinopropane) dihydrochloride and reducing agent N,N,N',N' - 627.03 grams of tetramethylethylenediamine, deoxygenated by passing high-purity nitrogen gas for 0.5 hours, adding 627.03 grams of sodium bisulfite and 627.03 grams of ammonium persulfate, continuing to pass nitrogen until the thermocouple in the polymerization kettle starts to heat up, and the reaction time is 3 hours. Open the ball valve at the bottom of the reactor, press out the obtained copolymer colloid with 0.3MPa compressed air, and granulate it into small colloids of 4-6 mm by a granulator. Knea...

Embodiment 3

[0063] This example is used to illustrate the acrylamide copolymer provided by the present invention and its preparation method.

[0064] Add 1080.4 kilograms of AM and 277.6 kilograms of temperature-resistant and salt-resistant monomer C (among them, M 1 and M 2 Not the same, M 1 for sodium, M 2 Potassium), 4074 kg of deionized water, under stirring, control the temperature of the solution with refrigerated saline at 0°C, and add sodium hydroxide to adjust the pH to 10. Pump the monomer solution into the polymerization tank, add 200 grams of water-soluble azo initiator 2,2'-azo(2-amidinopropane) dihydrochloride and reducing agent N,N,N',N' - 200 grams of tetramethylethylenediamine, deoxygenated by high-purity nitrogen for 0.5 h, adding 150 grams of sodium bisulfite and 200 grams of ammonium persulfate, and continuing to pass nitrogen until the thermocouple in the polymerization kettle starts to heat up, and the reaction time is 8 hours. Open the ball valve at the bottom o...

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Abstract

The invention discloses an acrylamide copolymer and a preparation method and an application thereof, wherein the acrylamide copolymer contains an acrylamide structural unit and a structural unit A shown in a formula (I), the viscosity average molecular weight of the acrylamide copolymer is more than 30 millions, M1 and M2 can be same or different and respectively can be sodium or potassium. The invention also discloses a preparation method of the acrylamide copolymer, and an application of the acrylamide copolymer as an oil displacement agent, the acrylamide copolymer of the present invention has the advantage of high temperature resistance, and has good tackifying effect under high ore degree, the acrylamide copolymer can be widely used in petrochemical industry filed, and especially is taken as an oil-displacement agent for tertiary recovery.

Description

technical field [0001] The invention relates to an acrylamide copolymer, a preparation method thereof, and an application of the acrylamide copolymer as an oil displacement agent. Background technique [0002] Polymer flooding mainly injects a certain scale of polymer solution, increases the viscosity of the displacement fluid, and reduces the water phase permeability of the oil layer to reduce the mobility ratio and adjust the water absorption profile to achieve the purpose of increasing the volume of the displacement phase, thereby improving the recovery. Rate. [0003] As the main polymer oil displacement agent, partially hydrolyzed polyacrylamide (HPAM) has been popularized and applied on a large scale in conventional oil reservoir EOB technology, and has played an important role in stabilizing and increasing oilfield production. With the reduction of reserves in conventional oil reservoirs, the application of HPAM in high-temperature and high-salt reservoirs faces many...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/56C08F220/58C08F8/12C09K8/588
Inventor 伊卓黄凤兴刘希赵方园张文龙林蔚然杜超方昭祝纶宇
Owner CHINA PETROLEUM & CHEM CORP
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