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Low-tension hydroxime-based emulsion flooding polymer and its preparation method

A technology of oil displacement polymer and low tension, which is applied in the direction of drilling compositions, chemical instruments and methods, etc., and can solve the problems of reducing the interfacial tension of the emulsion polymer flooding product system, poor solution uniformity and fluidity, and viscosity increasing effect Inadequate problems, to achieve the effect of reducing ground investment, fast dissolution speed, and strong viscosity increasing ability

Active Publication Date: 2017-12-22
山东金智瑞新材料发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, these polyacrylamide polymer oil displacement products currently used have problems such as slow dissolution rate, poor solution uniformity and fluidity, poor viscosity increasing effect, and poor oil displacement effect. Therefore, it is urgent to research and develop high viscosity, low tension. , High-efficiency new emulsion polymer oil flooding product, through the unique structure design and emulsion polymerization method of copolymerization containing multiple modified functional groups, polymer elements with emulsification function, phase stabilization function, and surface active substances are introduced in the emulsion polymerization process. To achieve rapid dissolution, viscosity increase and shear resistance of emulsion polymer flooding products, effectively reduce the interfacial tension of the emulsion polymer flooding product system, improve the fluidity and oil washing ability of the solution, and improve oil recovery

Method used

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  • Low-tension hydroxime-based emulsion flooding polymer and its preparation method
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  • Low-tension hydroxime-based emulsion flooding polymer and its preparation method

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Embodiment 1

[0048] The low-tension hydroxime-based emulsion flooding polymer provided in this example is composed of the following components: acrylamide, acrylic acid, water, liquid caustic, 2-acrylamido-2-methylpropanesulfonic acid, methylene bis Acrylamide, potassium bromate, sodium formate, pentasodium diethylenetriaminepentaacetic acid, copper sulfate pentahydrate, white oil D110, algal oil amide, Span-80, Tween-81, emulsifying and dispersing agent OA90, azo, hydroxylamine sulfate, isomerism Cetyl polyoxyethylene ether.

[0049] The content of each component is calculated in parts by weight:

[0050] Acrylamide 80~180 parts

[0051] Acrylic acid 50~100 parts

[0052] 50~180 parts of water

[0053] Liquid caustic soda 50~100 parts

[0054] 2-acrylamido-2-methylpropanesulfonic acid 10~40 parts

[0055] Methylenebisacrylamide 0.002~0.008 parts

[0056] Hydroxylamine sulfate 20-50 parts

[0057] Potassium bromate 0.055 parts

[0058] Sodium formate 0.140 parts

[0059] Pentasodi...

Embodiment 2

[0118] The preparation method of the low-tension hydroxime-based emulsion flooding polymer provided in Embodiment 2 of the present invention includes:

[0119] (1) Add water, acrylamide, acrylic acid, and liquid caustic soda to 2-acrylamido-2-methylpropanesulfonic acid in order to neutralize to the preset pH range, and control the temperature of the whole process to be lower than 50 degrees to form a reaction solution;

[0120] (2) Add white oil D110, algal oil amide, Span 80, Tween 81, emulsifying dispersant OA90, and azo to the reaction solution in sequence, and dissolve potassium bromate, sodium formate, and copper sulfate pentahydrate with appropriate amount of water. Add the reaction solution; in this example, the algal oil amide is obtained by extracting triglyceride from microalgae, adding liquid ammonia, and reacting at 1 Mpa and 150 degrees for 10 hours. (3) Emulsify with an emulsifier to a viscosity of 800-1200mPa·s, blow nitrogen for 20-60 minutes, control the tempe...

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Abstract

The invention discloses a low-tension hydroxyoximido emulsion oil-displacement polymer and a preparation method thereof. The low-tension hydroxyoximido emulsion oil-displacement polymer is composed of acrylamide, acrylic acid, water, liquid caustic soda, 2-acrylamido-2-methylpropyl sulfonic acid, methylene-bis acrylamine, potassium bromate, sodium formate, pentasodium diethylene triamine pentaacetate, chalcanthite, hydroxylamine sulfate, white oil D110, alga oleamide, Span-80, Tween-81, an emulsifying and dispersing agent OA90, azo and isohexadecyl ethylene oxide ether. The low-tension hydroxyoximido emulsion oil-displacement polymer has high molecular-weight and high solid content, is endowed with high-polymer main chain polyfunctional groups, and is an instant-dissolution reverse-phase microemulsion product with favorable stability and low tension.

Description

technical field [0001] The invention relates to the technical field of new organic polymer chemical materials, in particular to a low-tension hydroxime-based emulsion flooding polymer and a preparation method thereof. Background technique [0002] Petroleum is a non-renewable fossil energy, and its recovery rate is the most concerned issue in the petroleum industry and even the entire industry. In oil extraction, using the natural energy of the oil reservoir to extract oil is called primary oil recovery, and the recovery rate in this case can only reach about 15%. In the later stage, water injection or immiscible gas injection can be used to increase the pressure of the oil layer and displace the crude oil in the oil layer. This method is called secondary oil recovery. At present, secondary oil recovery can achieve a recovery rate of 30%-40%, or even as high as 80%. However, with the continuous injection of water, when the water cut in the oil field increases to more than ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/56C08F220/06C08F220/58C08F222/38C08F2/32C09K8/588C09K8/584
CPCC08F2/32C08F220/06C08F220/56C09K8/584C09K8/588C08F220/585C08F222/385
Inventor 李亮王海超吕明冯玉军李福利
Owner 山东金智瑞新材料发展有限公司
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