Hydrophobic associated polymer and synthesis process

A hydrophobic association, polymer technology, applied in drilling compositions, chemical instruments and methods, etc., can solve the problems of poor temperature resistance, salt resistance and shear resistance, unable to meet the requirements of tertiary oil recovery, etc., and achieve product quality. Stable, controllable and adjustable degree of hydrolysis, low energy consumption

Active Publication Date: 2019-09-06
江西富诚生态环境科技集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] CN201310435118.2 "Amphoteric Hydrophobic Association Polymer and Its Preparation Method", which mainly solves the problems existing in the prior art that the polymer has poor heat resistance, salt resistance and shear resistance, and cannot meet the requirements of tertiary oil recovery

Method used

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  • Hydrophobic associated polymer and synthesis process
  • Hydrophobic associated polymer and synthesis process
  • Hydrophobic associated polymer and synthesis process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Hydrophobic association polymer ratio

[0029]

[0030] The synthesis process is as follows:

[0031] 1. Add pure water to the reactor.

[0032] 2. Turn on the stirring motor of the reactor and adjust the speed to 18r / min.

[0033] 3. Add EDTA. Stirring time 5 minutes.

[0034] 4. Slowly add baking soda and stir for 30 minutes until the material liquid becomes clear.

[0035] 5. Adjust the speed to 8r / min.

[0036] 6. Add acrylic acid, add slowly, and the feeding time is 30 minutes to prevent a large number of bubbles in the reaction kettle.

[0037] 7. After the bubbles in the reactor disappear, adjust the speed to 15r / min.

[0038] 8. Add KCl and stir for 10 minutes.

[0039] 9. Open the valve of the circulation system, open the filter, start the circulation pump, and circulate for 10 minutes after confirming that the circulation is smooth.

[0040] 10. Use a thermometer to measure the temperature of the feed liquid. If it exceeds 20°C, stop the cycle imme...

Embodiment 2

[0055] Hydrophobic association polymer ratio

[0056]

[0057] The synthesis process is as follows:

[0058] 1. Add pure water to the reactor.

[0059] 2. Turn on the stirring motor of the reactor and adjust the speed to 18r / min.

[0060] 3. Add EDTA. Stirring time 5 minutes.

[0061] 4. Slowly add baking soda and stir for 30 minutes until the material liquid becomes clear.

[0062] 5. Adjust the speed to 8r / min.

[0063] 6. Add acrylic acid, add slowly, and the feeding time is 30 minutes to prevent a large number of bubbles in the reaction kettle.

[0064] 7. After the bubbles in the reactor disappear, adjust the speed to 15r / min.

[0065] 8. Add KCl and stir for 10 minutes.

[0066] 9. Open the valve of the circulation system, open the filter, start the circulation pump, and circulate for 10 minutes after confirming that the circulation is smooth.

[0067] 10. Use a thermometer to measure the temperature of the feed liquid. If it exceeds 20°C, stop the cycle imme...

Embodiment 3

[0082] Hydrophobic association polymer ratio

[0083]

[0084] The synthesis process is as follows:

[0085] 1. Add pure water to the reactor.

[0086] 2. Turn on the stirring motor of the reactor and adjust the speed to 18r / min.

[0087] 3. Add EDTA. Stirring time 5 minutes.

[0088] 4. Slowly add baking soda and stir for 30 minutes until the material liquid becomes clear.

[0089] 5. Adjust the speed to 8r / min.

[0090] 6. Add acrylic acid, add slowly, and the feeding time is 30 minutes to prevent a large number of bubbles in the reaction kettle.

[0091] 7. After the bubbles in the reactor disappear, adjust the speed to 15r / min.

[0092] 8. Add KCl and stir for 10 minutes.

[0093] 9. Open the valve of the circulation system, open the filter, start the circulation pump, and circulate for 10 minutes after confirming that the circulation is smooth.

[0094] 10. Use a thermometer to measure the temperature of the feed liquid. If it exceeds 20°C, stop the cycle imme...

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Abstract

The invention discloses a hydrophobic associated polymer and a synthesis process. The hydrophobic associated polymer is characterized by including, by weight, 320-360 parts of pure water, 0.25-0.75 part of ethylene diamine tetraacetic acid (EDTA-2Na), 25-35 parts of baking soda, 18-22 parts of acrylic acid, 12-18 parts of potassium chloride, 95-105 parts of acrylamide, 15-20 parts of urea and 25-30 parts of a monomer, wherein the EDTA-2Na has the sand carrying property of 2+ / -0.1 hours, the sedimentation smaller than 20%, the dry powder content of 0.25% and the viscosity of 21-27. Compared with the prior art, the hydrophobic associated polymer is simple in operation, low in production cost, stable in product quality and extremely low in environmental pollution effect. Meanwhile, the hydrophobic associated polymer has the advantages of being wide in raw material source, simple in production and operation, low in cost, small in influences on the environment, stable in product quality, high in dissolubility, resistant to temperature and salt, resistant to shearing, high in viscosity and the like and can be suitable for medium-and-low-temperature oil and gas reservoir fracturing construction and three-time oil production.

Description

technical field [0001] The invention belongs to the technical field of hydrophobic association of oilfield chemicals, and in particular relates to a hydrophobic association polymer and a synthesis process. Background technique [0002] Hydrophobic association polymer (HAWP) refers to a water-soluble polymer with a small amount of hydrophobic groups on the hydrophilic macromolecular chain of the polymer. Its solution has unique properties. In aqueous solution, the hydrophobic groups of such polymers are aggregated due to hydrophobic interaction, causing intramolecular and intermolecular associations of macromolecular chains. When the polymer concentration is higher than a certain critical concentration (CAC), the macromolecular chains aggregate through hydrophobic associations to form a supramolecular structure dominated by intermolecular associations—dynamic physical crosslinking network, the hydrodynamic volume increases, and the solution Viscosity increased significantly,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/56C08F220/06C08F226/02C09K8/68C09K8/588C09K8/88
CPCC08F220/56C09K8/588C09K8/68C09K8/882C08F220/06C08F226/02
Inventor 张学文张学武宋劲马建国
Owner 江西富诚生态环境科技集团有限公司
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