Method for preparing oil fracturing proppant from high-aluminum fly ash

A high-alumina fly ash and fracturing proppant technology, which is applied in chemical instruments and methods, earthwork drilling, and drilling compositions, can solve the problems of high production cost and high density of ceramsite proppant, and achieve The effect of improving product performance

Active Publication Date: 2015-02-25
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] In order to solve the problems that the density of the ceramsite proppant produced by the traditional method is too large, and the method of preparing the petroleum fracturing proppant by using fly ash as raw material needs to supplement aluminum source and the production cost is high, the present invention provides a powder-based proppant The method for preparing petroleum fracturing proppant from coal ash, using high-aluminum fly ash as raw material (alum

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  • Method for preparing oil fracturing proppant from high-aluminum fly ash
  • Method for preparing oil fracturing proppant from high-aluminum fly ash

Examples

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Embodiment 1

[0065] Pre-desilication reaction: put high-aluminum fly ash in 20% sodium hydroxide solution, the liquid-solid ratio is 4:1, heat up to 120°C, and stir at a stirring rate of 300r / min for 3h to react.

[0066] Acid activation reaction: filter and wash the fly ash after the pre-desilication reaction, put it in 10% hydrochloric acid solution, the liquid-solid ratio is 3:1, heat up to 75°C, and stir at a stirring rate of 300r / min for 2h to react .

[0067] After pre-desiliconization and acid activation reaction, washing and filtering, the high-alumina fly ash content is obtained: 65.8% of aluminum oxide, 31.4% of silicon oxide, 0.4% of iron oxide, wherein 10% of the total material mass is added as an auxiliary material (wherein the auxiliary material composition is Clay 30%, manganese ore powder 70%) were mixed evenly, and wet ball milled for 5 hours. The average particle size of the material after ball milling was 15 μm. After ball milling, the material was filtered and put into ...

Embodiment 2

[0069] Pre-desilication reaction: put high-aluminum fly ash in 15% sodium hydroxide solution, the liquid-solid ratio is 3:1, heat up to 110°C, and stir at a stirring rate of 400r / min for 2h to react.

[0070] Acid activation reaction: filter the fly ash after the pre-desiliconization reaction, wash it with water, put it in 15% hydrochloric acid solution, the liquid-solid ratio is 3:1, heat up to 65°C, and stir at a stirring rate of 300r / min for 2h to react .

[0071] After pre-desilication and acid activation reaction, washing and filtering, the high-alumina fly ash content is obtained: 60.5% of aluminum oxide, 35.4% of silicon oxide, 1.3% of iron oxide, wherein 6% of the total material mass is added as an auxiliary material (wherein the auxiliary material composition is 20% clay, 80% manganese ore powder) were mixed evenly, and wet ball milled for 3 hours. The average particle size of the material after ball milling was 23 μm. After ball milling, the material was filtered and...

Embodiment 3

[0073] Pre-desilication reaction: put high-alumina fly ash in 20% sodium hydroxide solution with a liquid-solid ratio of 4:1, heat up to 100°C, and stir at a stirring rate of 300r / min for 1h to react.

[0074] Acid activation reaction: filter and wash the fly ash after the pre-desiliconization reaction, put it in 10% hydrochloric acid solution, the liquid-solid ratio is 4:1, heat up to 70°C, and stir at a stirring rate of 400r / min for 1h to react .

[0075] After pre-desilication and acid activation reaction, washing and filtering, the high-alumina fly ash content is obtained: 57.6% of aluminum oxide, 38.2% of silicon oxide, 1.1% of iron oxide, wherein 6% of the total material mass is added as an auxiliary material (wherein the auxiliary material composition is Clay 10%, manganese ore powder 90%) were mixed evenly, and wet ball milled for 6 hours. The average particle size of the material after ball milling was 12 μm. After ball milling, the material was filtered and dried in ...

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Abstract

The invention provides a method for preparing an oil fracturing proppant from high-aluminum fly ash, which comprises the following steps: by using the high-aluminum fly ash as the raw material, pretreating, proportioning, carrying out ball milling, granulating and sintering to obtain the oil fracturing proppant. The pretreatment process comprises the steps of pre-desilicication, acid activation and the like. The treated high-aluminum fly ash has the advantages of uniform composition, high mullite content and low impurity content. The oil fracturing proppant subjected to proportioning, ball milling, granulating and sintering has the advantages of high addition amount of high-aluminum fly ash, low density and medium strength. The method has the advantages of wide raw material sources, low production cost, obvious environmental benefit and good quality of the oil fracturing proppant, and has obvious market advantages.

Description

technical field [0001] The invention belongs to the field of petroleum fracturing exploitation, and relates to a method for preparing a petroleum fracturing proppant by using high-aluminum fly ash as a raw material and the prepared petroleum fracturing proppant. Background technique [0002] Petroleum fracturing proppant is a support that keeps rock fissures deep in the formation open. It is used to support the two walls of fractures, improve the permeability of oil layers, and increase oil production. At present, the main proppant used in deep low-permeability oil and gas reservoirs is artificial ceramsite proppant, whose main components are mullite and corundum, which are generally prepared by sintering bauxite at high temperature. However, with the depletion of high-quality bauxite resources, on the one hand, fracturing proppant production enterprises have been restricted by two factors: national policy control and bauxite price rise; Although the proppant has high stren...

Claims

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Application Information

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IPC IPC(8): C09K8/80
CPCC09K8/80
Inventor 李会泉林滨李少鹏
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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