Ultrahigh-density ceramsite proppant and preparation method thereof

An ultra-high density, proppant technology, used in earth-moving drilling, production fluids, wellbore/well components, etc., can solve the unstable performance of ultra-high-density ceramsite proppant, reduce product market competitiveness, and add alumina. It can overcome the problem of large amount of powder, and achieve the effect of overcoming the phenomenon of powder removal, improving the anti-crushing ability and increasing the sintering temperature.

Active Publication Date: 2013-08-14
渑池德惠石油支撑剂有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When super-high-alumina bauxite is used as the main raw material to produce ultra-high-density ceramsite proppant, powder removal is prone to occur, which makes the performance of the produced ultra-high-density ceramsite proppant unstable; industrial alumina is used as the main raw material to produce ultra-high-density proppant. Although the density ceramsite proppant can overcome the above problems, the addition of alumina is too large and the firing temperature is high, which greatly increases the production cost and reduces the market competitiveness of the product

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The ultra-high-density ceramsite proppant of the present invention is composed of the following components in weight percent:

[0019] 75% bauxite, 8% alumina micropowder, 4% clay, 3% manganese ore, 3% silica micropowder, 3% limestone, 4% high-iron bauxite.

[0020] Co-grind bauxite, clay, manganese ore, limestone, and high-iron bauxite into fine powder with a 325-mesh sieve pass rate greater than 98% according to the ratio, then add alumina micropowder and silica micropowder, mix them evenly with a ball mill, and transfer them to the manufacturing plant. In the granulation pot, under the uniform rotation of the granulation pot, spray granulation, the particles are screened, dried until the moisture content is not more than 3%, and then enter the rotary kiln, fired at 1340 ℃ for 1 hour .

Embodiment 2

[0022] The ultra-high-density ceramsite proppant of the present invention is composed of the following components in weight percent:

[0023] 85% bauxite, 5% alumina micropowder, 2% clay, 2% manganese ore, 1% silica micropowder, 3% limestone, 2% high-iron bauxite.

[0024] The above-mentioned various ore raw materials are co-ground into a fine powder with a pass rate of 325 mesh sieves greater than 98% according to the ratio, then add alumina micropowder and silica micropowder, mix them evenly with a ball mill, and then transfer them to a granulation pot. Spray granulation under rotation, the granules are screened, dried until the moisture content is not more than 3%, and then put into the rotary kiln, fired at 1320°C for 1.5 hours.

Embodiment 3

[0026] The ultra-high-density ceramsite proppant of the present invention is composed of the following components in weight percent:

[0027] 75% bauxite, 18% alumina micropowder, 1% clay, 1% manganese ore, 1% silica micropowder, 2% limestone, 2% high iron bauxite.

[0028] The above-mentioned various ore raw materials are co-ground into a fine powder with a pass rate of 325 mesh sieves greater than 98% according to the ratio, then add alumina micropowder and silica micropowder, mix them evenly with a ball mill, and then transfer them to a granulation pot. Spray granulation under rotation, the granules are screened, dried until the moisture content is not more than 3%, and then put into the rotary kiln, fired at 1380°C for 1.5 hours.

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Abstract

The invention discloses an ultrahigh-density ceramsite proppant and a preparation method thereof. The ultrahigh-density ceramsite proppant is prepared from the following ingredients in percentage by weight: 75-85% of bauxite, 5-18% of alumina micropowder, 1-4% of clay, 1-3% of manganese ore, 1-3% of silicon micropowder, 1-3% of limestone and 2-4% of high-ferrum bauxite. The preparation method comprises the steps of co-grinding all the ore raw materials according to a proportioning ratio into fine powder which has the 325-mesh sieve pass ratio of over 98%, adding the alumina micropowder and the silicon micropowder, mixing uniformly by using a ball mill, loading a mixture to a granulation pot, carrying out spraying granulation under the uniform rotation of the granulation pot, screening granules, drying the screened granules until the moisture content is not higher than 3%, loading the dried granules to a rotary kiln, and sintering for 0.5-1.5 h at the temperature of 1,320-1,380 DEG C, thereby preparing the ultrahigh-density ceramsite proppant. The ultrahigh-density ceramsite proppant disclosed by the invention is stable in performance and low in production cost, and meets the national oil and gas industry standards.

Description

technical field [0001] The invention relates to an ultra-high-density ceramsite proppant, and also relates to a preparation method of the ultra-high-density ceramsite proppant. Background technique [0002] In the fracturing process of oil and natural gas deep well exploitation, proppants are used to provide high-permeability channels for the circulation of oil and gas flows, maintain high conductivity, and increase oil and gas production. In my country's petroleum industry, the bulk density is generally not less than 1.90g / cm 3 , The ceramsite proppant whose fracture rate is not more than 5.0% under the closing pressure of 86Mpa is called ultra-high density ceramsite proppant. Ultra-high-density ceramsite proppant has the advantages of strong crush resistance and acid erosion resistance. At present, one of the main raw materials used in the ultra-high-density ceramsite proppant developed by some enterprises in our country is super-grade high-alumina bauxite, and the other...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/80C04B35/10C04B35/622
Inventor 张希君刘腾孟晓钢张倩
Owner 渑池德惠石油支撑剂有限公司
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