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Acrylic acid-acrylamide copolymerization combined expansion material for self-tackifying particles and preparation method of self-tackifying particles

A technology of acrylamide copolymer and acrylamide copolymer is applied in the field of preparation of support particles for filling sand control and fracturing stimulation, and can solve problems such as unfavorable flowback, consumption, large pump power and the like

Pending Publication Date: 2021-02-02
北京化科开源新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, the high molecular compound used in the fracturing fluid enters the formation with clear water, the viscosity increases, consumes a lot of pump power, and is not conducive to full flowback; some of the high molecular compound left underground blocks the pores of the formation, leading to a decrease in the seepage capacity of the reservoir

Method used

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  • Acrylic acid-acrylamide copolymerization combined expansion material for self-tackifying particles and preparation method of self-tackifying particles
  • Acrylic acid-acrylamide copolymerization combined expansion material for self-tackifying particles and preparation method of self-tackifying particles
  • Acrylic acid-acrylamide copolymerization combined expansion material for self-tackifying particles and preparation method of self-tackifying particles

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Experimental program
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Effect test

Embodiment 1

[0035] 1) Take 1000g of quartz sand as raw material, heat to 160°C, add 10g of epoxy resin E12 (604), and stir evenly;

[0036] 2) The temperature of the mixture in step 1) was lowered to 140°C, and 13g of anionic polyacrylamide (commercially available, about 40 mesh) particles were added, and stirred evenly;

[0037] 3) Add 1.95g of phenalkamine T-31 curing agent, stir evenly and add 0.5g of calcium stearate;

[0038] 4) After cooling, sieve.

[0039] The particle size obtained after sieving is 20-40 mesh, and the surface is coated or partially coated with polyacrylamide particles.

Embodiment 2

[0041] 1) Take 1000g of quartz sand as raw material, heat to 160°C, add 10g of epoxy resin E12 (604), and stir evenly;

[0042] 2) The temperature of the mixture in step 1) was lowered to 140°C, and 13g of anionic polyacrylamide (commercially available, below 80 mesh) particles were added, and stirred evenly;

[0043] 3) Add 1.95g of alicyclic amine curing agent TCY-450 (Henan Tianze Industrial Co., Ltd.), stir evenly and add 0.5g of calcium stearate;

[0044] 4) After cooling, sieve.

Embodiment 3

[0046] 1) Select 13g of anionic polyacrylamide with a molecular weight of 22 million and a degree of hydrolysis of 25%, dissolve it in 200ml of water, add 0.2g of urea, 0.1g of thiourea and 0.001g of OP-10, stir well, and dry at 102 degrees Celsius. Crush to below 80 mesh;

[0047] 2) Take 1000g of quartz sand as raw material, heat to 160°C, add 10g of epoxy resin E12 (604), and stir evenly;

[0048] 3) The temperature of the mixture in step 2) is lowered to 140° C., adding the expanded composite particles in step 1), and stirring evenly;

[0049] 4) Add 1.95g of alicyclic amine curing agent TCY-450 (Henan Tianze Industrial Co., Ltd.), stir evenly and add 0.5g of calcium stearate;

[0050] 5) After cooling, sieve.

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Abstract

The present invention discloses an expansion material composition for self-tackifying particles. The composition comprises an acrylic acid-acrylamide copolymer and three auxiliary materials, the ratioof the amount of substance of acrylic acid molecular fragments to the amount of substance of acrylamide molecular fragments in the acrylic acid-acrylamide copolymer is 15:85 to 35:65, and the three auxiliary materials comprise urea, thiourea and a surfactant. Meanwhile, the invention discloses a preparation method of the self-tackifying particles prepared from the combined expansion material. Theself-tackifying particles prepared from the expansion material composition can be used as particles for filling sand prevention and fracturing yield increase in oil and gas field development, and after the self-tackifying particles are mixed with water, the viscosity of the liquid can be increased, and the self-tackifying particles are suspended in the water. The mixed liquid-solid mixture can beapplied to oil and gas field development filling sand prevention and fracturing production increase operation, the particle suspension time is long, sand blockage can be effectively reduced in the process of pumping into a filling layer, the conveying distance is farther, and the recovery rate of an oil and gas well is greatly increased.

Description

technical field [0001] The invention belongs to the field of geothermal, oil, natural gas and other fluid mineral exploitation, and specifically relates to a preparation method that can be used as support particles for filling sand control and fracturing stimulation in the development of geothermal and other fluid minerals. Background technique [0002] Crude oil in the oil field has high viscosity and the fractures in the reservoir are narrow. In order to increase oil recovery and reduce costs, quartz sand and ceramsite are usually used to support fracturing fractures to improve the seepage capacity of fractures. Quartz sand and ceramsite are deposited in forming fractures in the formation, preventing them from closing when the pressure decreases. According to literature, three liquid systems are mainly used in shale gas fracturing in the United States: direct liquid nitrogen injection, nitrogen foam injection, and drag-reducing water. In addition to the cost advantage, dr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/80C08L33/02C08K5/21C08K5/405
CPCC09K8/80C08K5/21C08K5/405C08L33/02Y02W30/91
Inventor 王中学
Owner 北京化科开源新材料科技有限公司
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