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Fly ash oil fracturing proppant and preparation method thereof

A fracturing proppant and fly ash technology, applied in chemical instruments and methods, earth drilling, clay products, etc., can solve the problems of high energy consumption, limit the development of fracturing proppant, etc., achieve material densification, lower temperature, Good wetting performance

Active Publication Date: 2013-07-10
HEBI TIANRUI PETROLEUM PROPPANT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The Chinese patent with the application number 02157202.X is currently a commonly used formula for proppant production and entrepreneurship, but the fracturing proppant provided by this patent relies on super-grade bauxite or first-grade bauxite and MnO 2 High-quality resources such as manganese ore with a content of more than 50% are prepared at relatively high temperatures. Therefore, high energy consumption and high resource consumption in the preparation process limit the further development of fracturing proppants

Method used

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preparation example Construction

[0035] The present invention also provides a kind of preparation method of fly ash-made oil fracturing proppant, comprising the following steps:

[0036] A) Mix fly ash, potassium feldspar powder and bauxite powder, perform homogenization and refinement treatment, and sieve after granulation to obtain a mixture;

[0037] B) After the mixture is fired and sieved, the proppant for petroleum fracturing pressure made from fly ash is obtained.

[0038] In the present invention, firstly, the fly ash, potassium feldspar powder and bauxite powder are mixed for homogenization and refinement treatment, and there is no special limitation on the manner of the homogenization and refinement treatment, and the specific method is as follows:

[0039] The fly ash, potassium feldspar powder and bauxite powder are placed in a forced mixer for homogenization and refinement. In the invention, the raw material is homogenized and refined, so that the particle size distribution of the raw material i...

Embodiment 1

[0056] After mixing 50Kg of dust removal waste ash from Hebi Wanhe Power Plant, 25Kg of potassium feldspar powder, and 25Kg of bauxite powder with an aluminum content of 70%, it is homogenized and refined by a forced mixer, then granulated, and the particle size is obtained by sieving. 900-600μm mixture, the mixture is fired at 1180-1220℃ for 4 hours in a rotary kiln with a size of 2.5m x 45m under normal pressure, and the mesh size of 20-40 mesh can be obtained after cooling and screening. (850~425μm) fly ash to make petroleum fracturing proppant.

[0057] The bulk density of the petroleum fracturing proppant measured by the fly ash is 1.60g / cm 3 , the apparent density is 2.7g / cm 3 , Under the closing pressure of 86Mpa, the broken rate is ≤7%.

Embodiment 2

[0059] After mixing 60Kg of waste dust from Hebi Wanhe Power Plant, 15Kg of potassium feldspar powder, and 25Kg of bauxite powder with an aluminum content of 70%, it is homogenized and refined by a forced mixer, then granulated, and the particle size is obtained by sieving. 900-600μm mixture, the mixture is fired at 1140-1200°C for 4 hours in a rotary kiln with a size of 2.5m x 45m under normal pressure, and the mesh size of 20-40 mesh can be obtained after cooling and screening. (850~425μm) fly ash to make petroleum fracturing proppant.

[0060] The bulk density of the petroleum fracturing proppant measured by the fly ash is 1.56g / cm 3 , the apparent density is 2.66g / cm 3 , Under the closing pressure of 86Mpa, the broken rate is ≤7%.

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Abstract

The invention provides a fly ash oil fracturing proppant which is prepared from the following constituents: 1wt%-60wt% of fly ash, 1wt%-30wt% of potash feldspar powder and balance of bauxite powder. According to the invention, the low-cost fly ash is used as the raw material, in the preparation process, the Al2O3 in the fly ash generates mullite, the surplus SiO2 in the raw material is transformed into low-apparent density minerals, such as the phosphorous quartz, and the apparent density of product is reduced. The K2O in the potash feldspar powder is used as the mineralizer, consequentially, the material is more compact, and thus, the strength of the oil fracturing proppant is increased. Moreover, when the Al2O3 and the SiO2 in the raw material are dissolved to a certain concentration, the Al2O3 and the SiO2 react with each other to generate the acicular mullite under the action of devitrification, and the mullite is continuously dissolved and devitrified so as to be changed from solid-phase reaction to liquid-phase reaction, as a result, the reaction speed is accelerated greatly, and the temperature needed for reaction is lowered.

Description

technical field [0001] The invention belongs to the technical field of petroleum fracturing proppants, and in particular relates to a fly ash-made petroleum fracturing proppant and a preparation method thereof. Background technique [0002] In oilfield oil and gas extraction, fracturing technology is widely used in order to increase oil well production, prolong oil well high-yield life, and exploit difficult-to-use resources. In order to prevent the closure of underground fractures, preserve oil and gas channels, and maintain flow conductivity, proppant must be used to fill fractures. Due to different depths of oil layers and different oil viscosities, the requirements for proppant properties such as strength, apparent density, and particle size are also different. According to the bulk density, fracturing proppants are divided into three categories: high-density and high-strength, medium-density and high-strength, and low-density and high-strength. In recent years, there h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/80C04B33/135
CPCC04B33/1352C04B35/185C04B35/62204C04B35/62695C04B2235/3217C04B2235/3267C04B2235/3472C04B2235/77C04B2235/78C09K8/80Y02P40/60
Inventor 张胜杰张林群王英军
Owner HEBI TIANRUI PETROLEUM PROPPANT
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