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Preparation technology of geopolymer fracturing propping agent

A technology of geopolymer and fracturing proppant, which is applied in the direction of drilling composition, mining fluid, cement production, etc., can solve the problems of low density, high energy consumption, easy deposition, etc., achieve low density, reduce deposition, The effect of increasing strength

Active Publication Date: 2017-01-04
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Geopolymers can be solidified at room temperature and have a relatively low density. Using them to make fracturing proppants is expected to solve the problems of easy deposition and high energy consumption of traditional fracturing proppants

Method used

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  • Preparation technology of geopolymer fracturing propping agent
  • Preparation technology of geopolymer fracturing propping agent
  • Preparation technology of geopolymer fracturing propping agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The geopolymer fracturing proppant provided in this example is prepared by the following method:

[0032] (1) Mix metakaolin with sodium silicate aqueous solution and potassium hydroxide at a mass ratio of 1:0.5:0.09 to prepare a geopolymer slurry with a viscosity of 6000mPa·s;

[0033] (2) Heat the polydimethylsiloxane to 70°C, stir the polydimethylsiloxane at a speed of 500r / min with a high-speed disperser, and pour the geopolymer slurry obtained in step (1) into the syringe Inject the geopolymer slurry into the polydimethylsiloxane with a needle tube. After 10 minutes, the geopolymer slurry in the dimethyl silicone oil is fully solidified, stop stirring, take out the formed primary fracturing proppant and wash it. use;

[0034] (3) The primary fracturing proppant obtained in step (2) is autoclaved and cured at 150° C. for 4 hours, and the geopolymer fracturing proppant is obtained after taking it out.

[0035] After testing, the sphericity of the geopolymer fractur...

Embodiment 2

[0037] The geopolymer fracturing proppant provided in this example is prepared by the following method:

[0038] (1) Mix finely ground blast furnace slag, fly ash, metakaolin, sodium silicate aqueous solution, and sodium hydroxide at a mass ratio of 0.5:0.15:0.35:0.6:0.12 to prepare a geopolymer slurry with a viscosity of 5000 mPa·s;

[0039] (2) Heat the polydimethylsiloxane to 80°C, stir the polydimethylsiloxane at a speed of 400r / min with a high-speed disperser, and pour the geopolymer slurry obtained in step (1) into the syringe Inject the geopolymer slurry into the polydimethylsiloxane with a needle tube. After 10 minutes, the geopolymer slurry in the dimethyl silicone oil is fully solidified, stop stirring, take out the formed primary fracturing proppant and wash it. use;

[0040] (3) The primary fracturing proppant obtained in step (2) is autoclaved and cured at 150° C. for 4 hours, and the geopolymer fracturing proppant is obtained after taking it out.

[0041] After...

Embodiment 3

[0043] The geopolymer fracturing proppant provided in this example is prepared by the following method:

[0044] (1) Mix metakaolin with sodium silicate aqueous solution and potassium hydroxide at a mass ratio of 1:0.3:0.05 to prepare a geopolymer slurry with a viscosity of 7000mPa·s;

[0045](2) Heat the polydimethylsiloxane to 60°C, stir the polydimethylsiloxane at a speed of 600r / min with a high-speed disperser, and pour the geopolymer slurry obtained in step (1) into the syringe Inject the geopolymer slurry into the polydimethylsiloxane with a needle tube. After 10 minutes, the geopolymer slurry in the dimethyl silicone oil is fully solidified, stop stirring, take out the formed primary fracturing proppant and wash it. use;

[0046] (3) The primary fracturing proppant obtained in step (2) is autoclaved and cured at 150° C. for 4 hours, and the geopolymer fracturing proppant is obtained after taking it out.

[0047] After testing, the average sphericity of the geopolymer ...

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Abstract

The invention provides a preparation technology of a geopolymer fracturing propping agent. The propping agent is prepared based on the characteristics that a geopolymer is solidified and moulded at relatively low temperature and has low density; in the invention, the propping agent is prepared by the following steps: mixing the geopolymer with a sodium silicate aqueous solution and alkali to obtain geopolymer slurry; dropwise adding the geopolymer slurry into constant-temperature polydimethylsiloxane, and solidifying into pellets; and performing autoclaved curing to obtain the propping agent. The preparation technology provided by the invention avoids high-temperature sintering, and the obtained geopolymer fracturing propping agent has high sphericity and low density and is favorable for conveying the propping agent in a crack while the production cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of fracturing proppant production, and in particular relates to a preparation process of a geopolymer fracturing proppant. Background technique [0002] The concept of geopolymer was proposed in 1978 by the Frenchman Davidovits in 1978, it is a kind of AlO 4 and SiO 4 An inorganic polymer with a three-dimensional network structure composed of tetrahedral structural units, amorphous to semi-crystalline, belongs to non-metallic materials. Generally, it is prepared from natural silicon-aluminum minerals, solid waste, and artificially synthesized silicon-aluminum compounds. It has the characteristics of early strength and quick hardening, acid and alkali resistance, and environmental protection. It has been widely used in building materials, inorganic membrane water treatment, and waste treatment. and other fields. Gao Fuxin used slag, silica fume powder, and fly ash as the main raw materials to prepare geopo...

Claims

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Application Information

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IPC IPC(8): C04B28/00C09K8/80
CPCC04B28/006C04B2111/00724C09K8/80C04B24/42Y02P40/10
Inventor 崔学民唐青薛国辉杨思杰杨权凤周慧荣庞媛徐梦雪
Owner GUANGXI UNIV
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