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Preparation method of high-density high-strength fracturing propping agent

A fracturing proppant, high-strength technology, applied in the direction of earthwork drilling, production fluid, wellbore/well components, etc., can solve the problems that cannot meet the deep fracturing market, high production cost of proppant, low sintering thermal efficiency, etc., to achieve Shorten the firing cycle, increase the density, and improve the effect of microstructure

Inactive Publication Date: 2015-06-03
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The high-end proppant products in the world are produced by Carbo Company in the United States. Domestic manufacturers mainly produce medium and low-grade products. The existing problems are low strength, high damage rate, low sintering thermal efficiency, high firing temperature, high energy consumption and high cost. , cannot meet the needs of the deep fracturing market
These two proppant ceramsites use bauxite or alumina as the main raw material, which has played a positive role in the rational utilization of resources, but the production cost of the proppant is high, the energy consumption is large, the firing thermal efficiency is low, and the firing temperature is high. (1400°C ~ 1450°C), especially in common heating methods, the heat loss is as high as 50%, and the fuel accounts for more than half of the total production cost

Method used

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  • Preparation method of high-density high-strength fracturing propping agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 1) Put industrial coke into a ball mill and use alumina balls as balls to add water to wet mill for 1 hour to form powdered carbon slurry, which passes through a 180-mesh sieve; among them, when wet grinding industrial coke, control alumina balls and industrial coke And the mass ratio of water is 2:1:0.6;

[0027] 2) Mix 60% calcium oxide micropowder and 40% magnesium oxide micropowder evenly according to mass percentage to obtain a highly active composite sintering aid; wherein, the particle size of calcium oxide micropowder and magnesium oxide micropowder are both less than 5 μm;

[0028] 3) According to the mass percentage, mix 65% alumina micropowder, 30% bauxite, 3% kaolin, and 2% composite sintering aid to obtain a mixture, put the mixture into a ball mill and use alumina balls The stone is wet-milled with balls and water for 3 hours to form a mixed slurry, and the mixed slurry is passed through a 320-mesh sieve; wherein, when wet-grinding the mixed material, the ...

Embodiment 2

[0033]1) Put industrial coke into a ball mill and use alumina balls as balls to add water to wet mill for 0.9h to form powdered carbon slurry, which passes through a 180-mesh sieve; among them, when wet grinding industrial coke, control alumina balls, industrial The mass ratio of coke and water is 2.2:1:0.7;

[0034] 2) Mix 65% calcium oxide micropowder and 35% magnesium oxide micropowder evenly according to mass percentage to obtain a highly active composite sintering aid; wherein, the particle size of calcium oxide micropowder and magnesium oxide micropowder are both less than 5 μm;

[0035] 3) According to the mass percentage, mix 67% alumina micropowder, 26% bauxite, 4% kaolin, and 3% composite sintering aid to obtain a mixture, put the mixture into a ball mill and use alumina balls The stone is wet-milled with balls and water for 2.5 hours to form a mixed slurry, and the mixed slurry is passed through a 320-mesh sieve; wherein, when wet-grinding the mixture, the mass rati...

Embodiment 3

[0040] 1) Put industrial coke into a ball mill and use alumina balls as balls to add water to wet mill for 0.8h to form powdered carbon slurry, which passes through a 180-mesh sieve; among them, when wet grinding industrial coke, control alumina balls, industrial The mass ratio of coke and water is 2.3:1:0.7;

[0041] 2) Mix 70% calcium oxide micropowder and 30% magnesia micropowder evenly according to mass percentage to obtain a highly active composite sintering aid; among them, the particle size of calcium oxide micropowder and magnesium oxide micropowder are both less than 5 μm;

[0042] 3) According to the mass percentage, mix 70% alumina micropowder, 20% bauxite, 6% kaolin, and 4% composite sintering aid to obtain a mixture, put the mixture into a ball mill and use alumina balls The stone is wet-milled with balls and water for 2 hours to form a mixed slurry, and the mixed slurry is passed through a 320-mesh sieve; wherein, when the mixed material is wet-milled, the mass r...

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Abstract

The invention discloses a preparation method of a high-density high-strength fracturing propping agent. The preparation method comprises the following steps of: carrying out wet grinding on coke to form burgy slurry, mixing alumina micro powder, bauxite, kaolin and a composite type sintering accessory ingredient, carrying out wet grinding on a mixture to form a mix mud, and carrying out granulation by adopting a fluidized bed spraying granulator with electrofusion molay stone sand as female particles and the mix mud as a coating solution, thus obtaining primary particles; carrying out granulation by adopting the fluidized bed spraying granulator with the primary particles as the female particles and the burgy slurry as the coating solution, thus obtaining the particles to be burned, raising the temperature of the particles to be burned at the heating speed of 3 DEG C / min-5 DEG C / min to 150 DEG C from room temperature, keeping temperature for 5min-10min, raising the temperature of the particles to be burned at the heating speed of 5 DEG C / min-10 DEG C / min to 750 DEG C-850 DEG C, keeping the temperature 1h-2h, taking the particles out after natural cooling, and sieving through 20-40-mesh screen, thus obtaining the high-density high-strength fracturing propping agent. The preparation method provided by the invention has the advantages that the energy consumption of a burning process is small, a production process is simple and is easy to control, the burning temperature is low, the time is short as well as the product quality is stable.

Description

technical field [0001] The invention belongs to the field of new materials and relates to a method for preparing a proppant, in particular to a method for preparing a high-density and high-strength fracturing proppant. Background technique [0002] Fracturing technology is an effective weapon to increase production and efficiency in the development of low-porosity and low-permeability gas reservoirs. In the fracturing process, the fracturing fluid creates cracks in the formation and opens channels for the migration of rock gas. In order to prevent the cracks from slowly closing under the pressure of formation closure and block the migration of rock gas, a fracturing proppant is used , the fracturing proppant enters the formation with the fracturing fluid, stays in the fracture after the fracturing fluid creates fractures, prevents the closure of fractures, forms a support zone with high conductivity, and ensures the successful migration of rock gas. Therefore, the fracturin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/80
Inventor 陈平殷海荣
Owner SHAANXI UNIV OF SCI & TECH
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