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Antibacterial and mildew-proof flexible gel particles, oil displacement agent and preparation method of the oil displacement agent

An antibacterial and antifungal, gel particle technology, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of bacterial mildew, etc., and achieve the effects of improving temperature resistance, increasing strength, and simple preparation process

Active Publication Date: 2020-07-31
陕西日新石油化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to avoid the deficiencies in the prior art, the present invention proposes an antibacterial and mildew-proof flexible gel particle, an oil displacement agent and a preparation method of the oil displacement agent, so as to overcome the use of the polyacrylamide flexible gel particle in the prior art on the oilfield site In the process, it is easy to breed bacteria and cause mildew, and realize the long-term anti-mildew effect of flexible gel particles

Method used

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  • Antibacterial and mildew-proof flexible gel particles, oil displacement agent and preparation method of the oil displacement agent
  • Antibacterial and mildew-proof flexible gel particles, oil displacement agent and preparation method of the oil displacement agent
  • Antibacterial and mildew-proof flexible gel particles, oil displacement agent and preparation method of the oil displacement agent

Examples

Experimental program
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Effect test

Embodiment 1

[0041] Dissolve 35g of acrylamide, 2g of 2-acrylamido-2-methylpropanesulfonic acid, 5g of ethyl acrylate, 0.5g of diacetone acrylamide, 1g of N,N-methylenebisacrylamide and 0.2g of polyvinylpyrrolidone In 56.25g of water, a colorless transparent aqueous solution was obtained. Nitrogen was used to remove oxygen for 30 minutes, and then 0.02 g of nano-copper oxide was added. After nitrogen bubbling and dispersion for 10 minutes, 0.03 g of an initiator 1wt% azobisisobutylamidine hydrochloride aqueous solution was added, and after nitrogen was continued for 10 minutes, the monomer began to Polymerization reaction, the polymerization reaction is an exothermic reaction, the temperature of the system rises slowly, and after rising to the highest temperature of 75°C, it is naturally cooled to room temperature, and the antibacterial and antifungal flexible gel is obtained. The antibacterial and mildew-proof flexible gel was cut, granulated, dried at 100° C. for 20 hours, crushed and si...

Embodiment 2

[0043] Dissolve 40g of acrylamide, 5g of 2-acrylamido-2-methylpropanesulfonic acid, 1g of n-butyl acrylate, 5g of diacetone acrylamide, 1g of ethylene glycol dimethacrylate and 2g of sodium lauryl sulfate In 45.85g of water, a colorless transparent aqueous solution was obtained. Nitrogen was used to deoxygenate for 10 minutes, then 0.1 g of nano-copper oxide was added, and after nitrogen bubbling and dispersion for 9 minutes, 0.05 g of an initiator 1wt% azobisisobutylamidine hydrochloride aqueous solution was added, and after nitrogen was continued for 15 minutes, the monomer began to generate Polymerization reaction, the polymerization reaction is an exothermic reaction, the temperature of the system rises slowly, and after rising to the highest temperature of 75°C, it is naturally cooled to room temperature, and the antibacterial and antifungal flexible gel is obtained. The antibacterial and mildew-proof flexible gel was cut, granulated, dried at 100° C. for 15 hours, crushe...

Embodiment 3

[0045] 10g of acrylamide, 15g of 2-acrylamido-2-methylpropanesulfonic acid, 8g of isobutyl acrylate, 5g of diacetone acrylamide, 5g of polyethylene glycol diacrylate and 2g of sodium dodecylbenzenesulfonate Dissolved in 54.94g of water to obtain a colorless transparent aqueous solution. Nitrogen was used to deoxygenate for 30 minutes, then 0.05 g of nano-copper oxide was added, and after nitrogen bubbling and dispersion for 10 minutes, 0.01 g of an initiator 1wt% azobisisobutylamidine hydrochloride aqueous solution was added, and after nitrogen was continued for 20 minutes, the monomer began to generate Polymerization reaction, the polymerization reaction is an exothermic reaction, the temperature of the system rises slowly, and after rising to the highest temperature of 80°C, it is naturally cooled to room temperature, and the antibacterial and antifungal flexible gel is obtained. The antibacterial and mildew-proof flexible gel was cut, granulated, dried at 80° C. for 20 hour...

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Abstract

The invention belongs to the technical field of oil exploitation, and particularly relates to antibacterial and mildew-proof flexible gel particles, an oil displacement agent and a preparation methodof the oil displacement agent. The preparation method of the antibacterial and mildew-proof flexible gel particle oil displacement agent comprises the following steps: (1) adding 0.1-5.0% of a dispersing agent and 1-10% of a pour point depressant into 1-10% of solvent oil, stirring and dissolving to obtain an oil-phase dispersion medium; and (2) adding the oil-phase dispersion medium obtained in the step (1) into 80-97% of antibacterial and mildew-proof flexible gel particles, and stirring and mixing to obtain the antibacterial and mildew-proof flexible gel particle oil displacement agent. According to the invention, the nano antibacterial particles are added in the process of preparing the gel particles; the nano-particle-doped cross-linked network structure gel is formed under the actionof an initiator, so that the strength of the gel can be effectively improved, and microorganisms can be killed in a short time by utilizing the surface effect of the nano-particles and the effect that active free radicals generated in colloidal particles easily decompose organic matters in bacteria.

Description

technical field [0001] The invention belongs to the technical field of petroleum exploitation, and in particular relates to an antibacterial and mildew-proof flexible gel particle, an oil-displacing agent and a preparation method of the oil-displacing agent. Background technique [0002] After long-term water injection development of ultra-low permeability reservoirs, natural micro-fractures, high-permeability zones, artificial fractures and water-injection dynamic fractures have formed dominant water flow channels. It is difficult to effectively produce medium and low permeability layers, and the uneven water flooding in the plane and section is contradictory. It is becoming more and more prominent, the reservoir decline is large, the water cut rises rapidly, and the oil recovery rate drops rapidly. Polyacrylamide-based flexible gel particle products show good results in the process of oilfield deep control and flooding because of their controllable particle size, wide adap...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/56C08F220/58C08F220/18C08F222/38C08F222/14C08F222/20C08F2/44C08K3/22C08K3/08C09K8/588
CPCC08F220/56C08F220/58C08F2/44C08K3/22C08K3/08C08K3/015C09K8/588C09K2208/10C08K2201/011C08K2003/2296C08K2003/2241C08K2003/222C08K2003/0806C08K2003/2248
Inventor 刘瑜安东赵全庭郭琦宾超王蕊
Owner 陕西日新石油化工有限公司