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High-strength magnesium aluminum silicate proppant and preparation method thereof

A magnesium aluminum silicate and proppant technology, applied in chemical instruments and methods, earthwork drilling, mining fluids, etc., can solve the problems of not being suitable for deep wells with high closure pressure, low cost of quartz sand, and short product retention period. Achieve the effect of high added value of products, simple production process and high ecological and environmental benefits

Active Publication Date: 2021-10-29
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, quartz sand is low in cost, low in density and easy to pump, and currently accounts for more than 50% of the proppant market share. However, the proppant has low strength and poor sphericity, and is not suitable for deep wells with high closure pressure.
Although the composite particles of resin-coated quartz sand have improved sphericity, strong corrosion resistance, and good flow conductivity, they are difficult to promote due to their short shelf life and high cost.

Method used

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  • High-strength magnesium aluminum silicate proppant and preparation method thereof

Examples

Experimental program
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Effect test

example 1

[0054] The specific preparation method of this example is as follows:

[0055] (1) Serpentinite, fly ash and coal gangue are dried in a drum dryer until their moisture content is below 1.0%, and the closed-circuit crushing method is crushed, and then the serpentinite is dried and crushed respectively. Roasting at 850°C for 15 minutes, drying and crushing the fly ash and then roasting at 950°C for 15 minutes, drying and crushing the coal gangue and then roasting at 900°C for 25 minutes to obtain the powder of the three.

[0056] (2) Mix and grind 4.5t of serpentine powder, 3.5t of fly ash powder, 2t of gangue powder, and 2.5t of additives, including 1.5t of yellow sand and 1t of potassium stone to obtain 12.5t mixed material powder.

[0057] The obtained mixed material powder includes 35% MgO, 33% SiO 2 , 4% CaO, 7% Fe 2 o 3 and 13% Al 2 o 3 , and the balance is impurities. The particle size of the mixed material powder is 35-75 μm.

[0058] (3) Add the mixed material p...

example 2

[0062] The specific preparation method of this example is as follows:

[0063] (1) Dry the serpentine beneficiation tailings, fly ash and coal gangue in a drum dryer until their moisture content is below 1.5%, and then crush them in a closed-circuit crushing method, and then separate the serpentine beneficiation tailings Dry and crush the slag and bake at 700°C for 50 minutes, dry and crush the fly ash and bake at 850°C for 45 minutes, dry and crush the coal gangue and bake at 950°C for 15 minutes to obtain the powder of the three.

[0064] (2) Mix and grind 3.5t of serpentinite powder, 4.0t of fly ash powder, 2.5t of gangue powder, and 3.0t of additives, including 1.5tg of quartz sand and 1.5t of Illite, to obtain about 13.0t mixed material powder.

[0065] The obtained mixed material powder includes 31% MgO, 34% SiO 2 , 3% CaO, 9% Fe 2 o 3 and 11% Al 2 o 3 , and the balance is impurities. The particle size of the mixed material powder is 20-45 μm.

[0066] (3) Add th...

example 3

[0070] The specific preparation method of this example is as follows:

[0071] (1) Dry the chrysotile beneficiation tailings, fly ash and coal gangue in a drum dryer until their moisture content is below 1.0%, and then crush them in a closed-circuit crushing method, and then separate the serpentine beneficiation tailings Roast at 800°C for 25 minutes after drying and crushing, dry and crush the fly ash and bake at 900°C for 25 minutes, dry and crush the coal gangue and bake at 900°C for 25 minutes to obtain the powder of the three.

[0072](2) Mix and grind 4.0t of serpentinite powder, 4.5t of fly ash powder, 1.5t of coal gangue powder, and 3.5t of additives, including 0.5t of quicklime and 3.0t of yellow Sand, to obtain about 13.5t mixed material powder.

[0073] The obtained mixed material powder includes 34% MgO, 37% SiO 2 , 3% CaO, 8% Fe 2 o 3 and 11% Al 2 o 3 , and the balance is impurities. The particle size of the mixed material powder is 2-25 μm.

[0074] (3) A...

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Abstract

The invention provides a high-strength magnesium aluminum silicate proppant and a preparation method thereof. The preparation method comprises the following steps: respectively drying, crushing and roasting a raw material containing serpentine minerals, fly ash and coal gangue to obtain powder of the three materials; mixing and grinding the powder of the three materials and an auxiliary agent to obtain mixed material powder; granulating the mixed material powder to obtain a spherical granular green body; and drying and sintering the spherical granular green body to obtain the high-strength magnesium aluminum silicate proppant. The diameter of the high-strength magnesium aluminum silicate proppant ranges from 106 microns to 3350 microns, the sphericity and the roundness are not lower than 0.9, the volume density is 1.3-1.8 g / cm<3>, and the breakage rate under the closing pressure of 86 MPa to 103 MPa is smaller than or equal to 9%. The high-strength petroleum fracturing magnesium aluminum silicate proppant is produced by taking the rock, the barren rock and the tailings which mainly contain serpentine as raw materials, so that resource utilization of various solid wastes is realized.

Description

technical field [0001] The invention belongs to the field of oil and gas application materials, and in particular relates to a preparation method of a high-strength magnesium-aluminum silicate proppant and a product of the high-strength magnesium-aluminum silicate proppant. Background technique [0002] During oil and gas deep well mining, in order to crack the oil-gas-bearing rock formation and collect oil and gas from the channels formed by the cracks, it is necessary to use petroleum proppant and high-pressure solution to enter the formation and fill in the formation fractures to exceed the pressure of formation fracture strength. Create cracks in the rock formations around the wellbore, and oil and gas products can pass through smoothly to increase production. [0003] Petroleum proppant needs to meet the following requirements: (1) It must have sufficient compressive strength and wear resistance, be able to withstand the strong pressure and friction during injection, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/80
CPCC09K8/80
Inventor 孙红娟唐颂彭同江罗利明王璨
Owner SOUTHWEAT UNIV OF SCI & TECH
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