A kind of fly ash-made petroleum fracturing proppant and preparation method thereof

Abstract

Provided is a petroleum fracturing proppant prepared from flyash, the petroleum fracturing proppant being prepared from the following components: 1 wt.% - 60 wt.% of flyash; 1 wt.% - 30 wt.% of potassium feldspar powder, and the balance being bauxite powder. The present invention utilizes low-cost flyash as raw material, and in the preparation process, Al2O3 in the flyash is prepared into mullite, and the surplus SiO2 in the raw material is converted into a low apparent-density mineral such as tridymite, etc., thus reducing the apparent density of the product; K2O in the potassium feldspar powder is used as mineralizer to further densify the material, thus increasing the strength of the petroleum fracturing proppant. In addition, when dissolved to a certain concentration, Al2O3 and SiO2 in the raw material react with each other to give acicular mullite for crystallization, followed by continuous dissolution and crystallization, such that the solid phase reaction of the mullite is transformed into a liquid phase reaction, thus greatly accelerating the reaction and reducing the temperature required for the reaction.

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...

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