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Low-density high-strength ceramic granule propping agent and preparation method thereof

A high-strength ceramsite and proppant technology, applied in the field of fracturing proppant, can solve the problems of unfavorable flow diversion, short support zone, neglect of apparent density, etc., and achieve the effects of shortening the firing cycle, reducing density and rich resources

Active Publication Date: 2010-09-22
郑州德赛尔陶粒有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, a large number of domestic researches are also focused on improving the strength of the proppant. Although some results have been achieved, the apparent density (generally greater than 3.3g / cm 3 ), so that the proppant tends to produce shorter support bands in the application, which accumulate at the ports of the fractures, which is extremely unfavorable for flow diversion

Method used

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  • Low-density high-strength ceramic granule propping agent and preparation method thereof
  • Low-density high-strength ceramic granule propping agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Example 1 A low-density, high-strength ceramsite proppant is prepared from the following raw materials: 50% of tertiary bauxite, 40% of hard clay, 8% of spodumene, and 2% of industrial starch.

[0035] The preparation method of the above-mentioned low-density high-strength ceramsite proppant comprises the following steps:

[0036] (1) Bauxite and hard clay are lightly burned at 600°C;

[0037] (2) Process the lightly burned bauxite, hard clay and spodumene into 1-3mm lumps through jaw breaking and counter-rolling respectively;

[0038] (3) get bauxite, hard clay, spodumene and industrial starch by the raw material proportioning described in claim 1 and mix into compound;

[0039] (4) Get the mixture obtained in the previous step, mix it with the weight ratio of mixture: grinding medium: water = 1: 2: 0.8, mix it with grinding medium and water, put it in a ball mill for wet grinding for 24 hours, and make the particle size of the mixture reach 5~20um;

[0040] (5) Aft...

Embodiment 2

[0042] Example 2 A low-density, high-strength ceramsite proppant is prepared from the following raw materials: 40% of tertiary bauxite, 55% of tertiary hard clay, 4% of spodumene, and 1% of industrial starch.

[0043] Its preparation method is basically the same as Example 1, the difference is: in the step (4) with the mixing material: grinding medium: water = 1: 2.2: 0.7 weight ratio mixed with grinding medium, quality water, put in ball mill Grind for 20 hours to make the particle size of the mixture reach 10-20um.

Embodiment 3

[0044] Example 3 A low-density, high-strength ceramsite proppant is prepared from the following raw materials: 60% of tertiary bauxite, 30% of tertiary hard clay, 7% of spodumene, and 3% of industrial starch.

[0045] Its preparation method is basically the same as Example 1, the difference is: in the step (4) with the mixture: grinding medium: water = 1: 2: 1 weight ratio mixed with grinding medium, quality water, put in ball mill Grind for 28 hours to make the particle size of the mixture reach 10-15um.

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Abstract

The invention relates to a low-density high-strength ceramic granule propping agent and a preparation method thereof. The preparation method comprises the following steps of: mixing 40-60 percent by weight of light burnt bauxite, 30-55 percent by weight of hard clay, 4-12 percent by weight of spodumene granules and 1-3 percent by weight of industrial starch; then, mixing 1 percent by weight of mixture, 1.5-2.5 percent by weight of grinding medium and 0.6-1 percent by weight of water; grinding wetly in a ball mill for 20-30h; spraying and drying ground slurry to obtain powder, transferring thepowder into a disc granulator to granulate; conveying screened granules into a rotary kiln to sinter at a sintering temperature of 1350-1450 DEG C; and keeping the temperature for 1.5-2.5h. The ceramic granule product has smooth and compact surface and the excellent performance of high compressive strength, low apparent density and good chemical stability and acid resistance, and a wet method ball grinding process is adopted to improve the shapes and the granularity distribution of raw materials, improve the quality of the ceramic granules, lessen the powder pollution, enhance the mind and body health of workers and protect the environment.

Description

technical field [0001] The invention relates to a fracturing proppant, in particular to a low-density, high-strength ceramsite proppant and a preparation method thereof. Background technique [0002] Fracturing technology plays an important role in the development of oil and natural gas, and the success or failure of fracturing and the length of validity depend on the technical performance of fracturing proppant. The proppant is brought into and supported by the fracturing fluid in the fractures of the fracturing formation, thereby effectively introducing oil and gas into the oil and gas wells, greatly increasing oil and gas production and prolonging the life of the oil well. Proppant is the key material in fracturing construction, which is natural sand or artificial high-strength ceramic particles with a certain particle size and gradation. Ceramic proppant is made of bauxite by powder granulation and sintering. It has the characteristics of high temperature resistance, hi...

Claims

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Application Information

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IPC IPC(8): C09K8/80
Inventor 唐珂石凯胡波张丰乐张顺庆
Owner 郑州德赛尔陶粒有限公司
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