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Method for preparing fracturing propping agent using illite

A fracturing proppant and illite technology is applied in the field of preparing composite fracturing proppant by using illite, which can solve the problems of high brittleness and poor mechanical properties of the proppant.

Inactive Publication Date: 2012-10-10
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] At present, low-density, high-strength, low-brittleness and corrosion resistance have become the main research trend of proppant ceramsite. To achieve this goal, different high-temperature fluxes are introduced into the proppant formula and the way of ceramsite molding is optimized, which improves to a certain extent. The mechanical properties of the proppant improve the acid resistance and salt resistance of the material. However, it still cannot fundamentally solve the shortcomings of the poor mechanical properties (brittleness) of the ceramsite proppant

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1) Put the illite, spodumene and alumina powder into the ball mill for dry grinding, use the alumina ball stone as the grinding medium, control the mass ratio of the ball and the raw material to 2:1, ball mill for 0.5h to 2h respectively, and then Pass through 120 mesh sieve;

[0026] 2) Put 40% sieved illite, 35% alumina powder, 10% spodumene, 8% barium carbonate and 7% alumina chopped fiber into the ball mill according to mass percentage, and then add mass Mix the gum solution with a concentration of 10%, use alumina ball stone as the grinding medium, control the mass ratio of the grinding ball, the mixture and the gum solution to 2:1:0.3, grind for 0.5h to 3h to form a mixed mud, and the mud passes through 300 mesh sieve;

[0027] Among them, alumina powder is α-alumina or corundum powder for industrial use, its corundum content is > 98%, and the particle diameter of the powder is < 10 μm; The obtained slag-free unidirectionally extended fibers have a diameter of 1...

Embodiment 2

[0031] 1) Put the illite, spodumene and alumina powder into the ball mill for dry grinding, use the alumina ball stone as the grinding medium, control the mass ratio of the ball and the raw material to 2.5:1, ball mill for 0.5h to 2h respectively, and then Pass through 120 mesh sieve;

[0032] 2) Put 55% sieved illite, 25% alumina powder, 5% spodumene, 5% barium carbonate and 10% alumina chopped fiber into the ball mill according to mass percentage, and then add mass Mix the gum solution with a concentration of 10%, use alumina ball stone as the grinding medium, control the mass ratio of the grinding ball, the mixture and the gum solution to 2.5:1:0.35, grind for 0.5h to 3h to form a mixed mud, and the mud passes through 300 mesh sieve;

[0033] Among them, alumina powder is α-alumina or corundum powder for industrial use, its corundum content is > 98%, and the particle diameter of the powder is < 10 μm; The obtained slag-free unidirectionally extended fibers have a diameter...

Embodiment 3

[0037] 1) Put the illite, spodumene and alumina powder into the ball mill for dry grinding, use the alumina ball as the grinding medium, control the mass ratio of the ball and the raw material to be 3:1, ball mill for 0.5h to 2h respectively, and then Pass through 120 mesh sieve;

[0038] 2) Put 54% sieved illite, 30% alumina powder, 8% spodumene, 3% barium carbonate and 5% alumina chopped fibers into the ball mill according to mass percentage, and then add mass Mix the gum solution with a concentration of 10%, use alumina ball stone as the grinding medium, control the mass ratio of the grinding ball, the mixture and the gum solution to 3:1:0.38, grind for 0.5h to 3h to form a mixed mud, and the mud passes through 300 mesh sieve;

[0039] Among them, alumina powder is α-alumina or corundum powder for industrial use, its corundum content is > 98%, and the particle diameter of the powder is < 10 μm; The obtained slag-free unidirectionally extended fibers have a diameter of 15-...

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Abstract

A method for preparing fracturing propping agent using illite includes: mixing the illite, alumina powder, spodumene, barium carbonate and alumina chopped fiber, adding gum solution, well mixing and wet-grinding to form mixed slurry, using a pressure spray granulator to granulate, placing particles into an alumina crucible, placing the alumina crucible into a silicon carbide rod resistance furnace, heating from room temperature to 1230 DEG C at a heating speed of 5-10 DEG C / min, preserving heat for 0.5-1 hours, heating to 1350-1400 DEG C at a heating speed of 5-7 DEG C / min, preserving heat for 2-3 hours, natural cooling with the furnace and taking out, and sieving through a 20-40-mesh screen to obtain composite fracturing propping agent. By introducing the alumina chopped fiber, composite material is integrated into incompact ceramic propping agent, high-temperature reaction self-generation is used as supplement to provide fiber (whisker) which is necessary for strengthening and toughening, and the composite fracturing propping agent which is high in strength and toughness, low in density and breakage ratio is prepared through fiber strengthening and particle strengthening.

Description

technical field [0001] The invention relates to a method for preparing ceramic composite materials by using natural aluminum-rich silicate mineral raw materials, in particular to a method for preparing composite fracturing proppants by using illite. Background technique [0002] As a new industry, fracturing proppant has not been developed for a long time in my country, its product structure and varieties are still far from perfect, and the processing scale and level of the industry are in the initial stage of development. Most oil and gas fields are of medium depth, requiring fracturing proppants to have high strength and low fragmentation rate to withstand the huge pressure of the rock formation and various corrosions in the formation environment. In the world, sintered corundum products are often used as fracturing proppants in medium and deep oil and gas fields. Although this product can meet the requirements in terms of physical and chemical properties, the source of ra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/80C04B35/622
Inventor 陈平
Owner SHAANXI UNIV OF SCI & TECH