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Preparation method of lightweight acid resistant ceramsite fracturing propping agent

A technology of fracturing proppant and ceramsite, which is applied in the direction of earthwork drilling, mining fluid, wellbore/well parts, etc., achieving the effects of simple process, low sintering temperature, reducing high-temperature energy consumption and product cost

Inactive Publication Date: 2012-02-15
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, no proppant products with acid solubility <0.5% have been reported

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] (1) Ingredients according to mass percentage: α-Al 2 o 3 Powder 85%, titanium dioxide 1%, barium carbonate 6%, magnesium oxide 8%;

[0015] (2) putting the material obtained in step (1) into a ball milling device for ball milling and mixing for 24 hours;

[0016] (3) drying the slurry obtained in step (2) at a temperature of 100° C. for 5 hours;

[0017] (4) The material obtained in step (3) is processed into a spherical granular green body through a molding process;

[0018] (5) Sinter the granular green body obtained in step (4) at 1450° C. in a silicon-molybdenum furnace, keep it warm for 1 hour, and cool down with the furnace temperature.

[0019] The acid solubility of the obtained product is 0.2%, and the apparent density is 2.2g / cm 3 .

Embodiment 2

[0021] (1) The mass percentage of raw materials is: α-Al 2 o 3 Powder 86%, titanium dioxide 4%, barium carbonate 3%, magnesium oxide 7%;

[0022] (2) Putting the raw material of step (1) into a ball milling device and carrying out ball milling for 24 hours;

[0023] (3) drying the slurry obtained in step (2) at a temperature of 100° C. for 5 hours;

[0024] (4) The material obtained in step (3) is processed into a spherical granular green body through a molding process;

[0025] (5) Sinter the granular green body obtained in step (4) at 1400° C. in a silicon-molybdenum furnace, keep it warm for 1 hour, and cool down with the furnace temperature.

[0026] The acid solubility of the obtained product is 0.15%, and the apparent density is 3.2g / cm 3 .

Embodiment 3

[0028] (1) The mass percentage of raw materials is: α-Al 2 o 3 Powder 88%, titanium dioxide 7%, barium carbonate 2%, magnesium oxide 3%;

[0029] (2) Putting the raw material of step (1) into a ball milling device and carrying out ball milling for 24 hours;

[0030] (3) drying the slurry obtained in step (2) at a temperature of 100° C. for 5 hours;

[0031] (4) The material obtained in step (3) is processed into a spherical granular green body through a molding process;

[0032] (5) Sinter the granular green body obtained in step (4) at 1450° C. in a silicon-molybdenum furnace, keep it warm for 1 hour, and cool down with the furnace temperature.

[0033] The acid solubility of the obtained product was 0.45%.

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Abstract

The invention discloses a preparation method of a lightweight acid resistant ceramsite fracturing propping agent. Raw materials contain: by weight, 70-90% of alumina, 0.1-10% of titanium dioxide and 0-30% of a sintering agent, wherein the sum of the mass percentage of the raw materials is 100% and the sintering agent contains one or more compounds selected from barium, calcium, magnesium and boron. The preparation method provided by the invention comprises the following steps of: putting the raw materials into a ball milling device and carrying out ball milling for 12-48 hours; drying the obtained slurry at the temperature of 60-120 DEG C for 3-12 hours; preparing the obtained raw material into a spherical granular green compact by a molding technology; sintering the obtained granular green compact in a Si-Mo furnace at the temperature of 1300-1550 DEG C, keeping warm for 0.5-3 hours, and cooling with the furnace temperature. Tested according to the SY / T5108-2006 recommended method, the acid solubility of the finished product is less than 0.5%, which reaches the standard requirement in the industry (the allowable value of the acid solubility is less than or equal to 5%). The technology provided by the invention is simple and is suitable for industrial production; in addition, the sintering temperature of the prepared product is low, thus substantially reducing high temperature energy consumption and product cost during the high-alumina ceramic production.

Description

technical field [0001] The invention relates to a preparation method of a lightweight acid-resistant ceramsite fracturing proppant. Background technique [0002] Fracturing proppant is a special material for oil and gas fracturing technology, which is used to support rock fractures, provide high permeability channels for the flow of oil and gas flow, and maintain high conductivity, thereby increasing oil and gas production, extending the service life of oil and gas wells, Reduce oil and gas production costs. The quality of fracturing proppant is the key to the success of oil and gas exploitation, among which acid resistance is one of the important indicators. The proppant pressed into the rock fracture must be able to withstand the erosion of various media in the formation environment, so as not to be corroded and fragmented to block the fracturing channel and prevent the outflow of gas and oil. In terms of performance of fracturing proppant, the same problems exist both a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/80
Inventor 吴婷婷吴伯麟
Owner GUILIN UNIVERSITY OF TECHNOLOGY