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Airbag shell inflatable suspension proppant and preparation method thereof

The technology of proppant and airbag shell is applied in the field of inflatable suspension proppant of airbag shell and its preparation, which can solve the problems of high construction cost, loss of self-suspending ability of proppant, etc. Wide range of effects

Active Publication Date: 2021-04-27
CHENGDU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this kind of aerophilic coating proppant must be matched with nitrogen injection during the construction process, the construction cost is high, and the proppant loses its self-suspension ability after the bubbles are desorbed from the surface of the proppant

Method used

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  • Airbag shell inflatable suspension proppant and preparation method thereof
  • Airbag shell inflatable suspension proppant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A kind of preparation process of air bag shell inflatable suspension proppant:

[0027] Step 1: Dissolve 0.02g glyceryl tripalmitate, 0.03g acrylic acid, and 0.05g polyurethane in 5mL petroleum ether, then atomize and spray the petroleum ether solution onto the surface of 100g quartz sand proppant, and the particle size range of quartz sand is 40 -70 mesh;

[0028] Step 2: Physically stir and mix the proppant obtained in step 1 with 0.06g sodium carbonate, 0.04g citric acid, 0.1g ammonium chloride, and 0.1g sodium nitrite powder, and use an adhesive to bond the gasifying agent powder to the proppant surface;

[0029] Step 3: Mix 0.1g polyethylene glycol diacrylate, 0.3g tert-butyl acrylate, 0.002g organic nano-montmorillonite and 2mL white oil evenly, mix 0.005g initiator with 1.5mL white oil, and the initiator It is a mixture of dibenzoyl peroxide and N,N-dimethylaniline (molar ratio 2:1), atomize and spray the white oil containing the shell agent and the shell enhan...

Embodiment 2

[0031] A preparation process of an airbag shell inflatable suspension proppant:

[0032] Step 1: Dissolve 0.01g of cetyl acetyl octaester, 0.1g of epoxy resin, and 0.05g of ethylenediamine in 5mL of acetone, and then atomize and spray the acetone solution onto the surface of 100g of quartz sand proppant. The range is 20-40 mesh;

[0033] Step 2: Physically stir and mix the proppant obtained in step 1 with 0.12g sodium carbonate, 0.08g citric acid, 0.3g ammonium chloride, and 0.3g sodium nitrite powder, and use an adhesive to bond the gasifying agent powder to the proppant surface;

[0034] Step 3: Mix 0.1g polyethylene glycol diacrylate, 0.8g tert-butyl acrylate, 0.1g styrene, 0.005g carbon nanotubes with 5mL kerosene, mix 0.01g initiator with 3.0mL kerosene, and initiate The agent is a mixture of dibenzoyl peroxide and N,N-dimethylaniline (molar ratio 2:1), and the kerosene containing the capsule shell agent and the capsule shell enhancer and the kerosene containing the ini...

Embodiment 3

[0036] A preparation process of an airbag shell inflatable suspension proppant:

[0037] Step 1: Dissolve 0.03g of pentaerythritol tetra(stearate), 0.2g of epoxy resin, and 0.1g of m-phenylenediamine in 5mL of toluene, and then atomize and spray the toluene solution onto the surface of 100g of ceramsite proppant. The particle size range is 20-40 mesh;

[0038] Step 2: Physically stir and mix the proppant obtained in step 1 with 0.25g urea, 0.2g oxalic acid, 0.37g sodium carbonate, and 0.5g sodium nitrite powder, and use an adhesive to bond the gasifying agent powder to the surface of the proppant;

[0039] Step 3: Mix 0.25g polyethylene glycol dimethacrylate, 1.0g tert-butyl acrylate, 0.55 butyl methacrylate, 0.018g nano-silicon dioxide and 7mL diesel oil, mix 0.02g initiator with 4.0mL The diesel oil is mixed evenly, the initiator is a mixture of dibenzoyl peroxide and N,N-dimethylaniline (molar ratio 2:1), the diesel oil containing the capsule shell agent and the capsule shel...

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Abstract

The invention discloses an airbag shell inflation suspension proppant which structurally comprises a proppant body serving as a core, the surface of the proppant body is wrapped with an inner coating, and the surface of the inner coating is wrapped with an outer coating. The inner coating comprises an adhesive and a gas generating agent, and the gas generating agent is at least two of ammonium chloride, sodium nitrite, potassium nitrite, urea, sodium carbonate, ammonium carbamate, sodium bicarbonate, ammonium nitrate, potassium nitrate, sodium nitrate, acetylsalicylic acid, citric acid, sulfamic acid and oxalic acid. The outer coating comprises a capsule shell agent, and the capsule shell agent is formed by polymerizing at least two monomers of polyethylene glycol diacrylate, polyethylene glycol dimethacrylate, tert-butyl acrylate, butyl methacrylate and styrene. Under the stimulation of a certain external environment, the gas generating agent responds and decomposes to generate gas, the outer coating wraps and seals the generated gas to form an airbag, and self-suspension of the proppant in slick water is achieved under the buoyancy effect of the airbag.

Description

technical field [0001] The invention relates to the technical field of oilfield chemistry, in particular to an air-filled suspension proppant for an air bag shell and a preparation method thereof. Background technique [0002] Volume fracturing is the mainstream technical approach for the development of unconventional oil and gas resources such as shale oil and gas and tight oil and gas. At present, the fracturing fluid system widely used in unconventional oil and gas volume fracturing technology is mainly slick water fracturing fluid. Compared with conventional linear and crosslinked fracturing fluids, this type of fracturing fluid has the advantages of low cost, less reservoir damage, and strong ability to create complex fracture networks. However, due to the low viscosity of slick water and poor sand-carrying ability, the Field applications mainly use large-displacement hydraulic shock to carry sand. It is difficult to increase the sand ratio and the proppant spreads une...

Claims

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Application Information

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IPC IPC(8): C09K8/80C09D7/61C09D7/63C09D151/08
CPCC09K8/80C09D7/61C09D7/63C09D151/08
Inventor 杨洋张浩杨波王浩彭武
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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