A method of preparing high-strength oil and gas fracturing proppant by using ceramsite waste

Abstract

The invention provides a method for preparing a high-strength oil-gas fracturing proppant by using ceramsite waste, which comprises the following steps: after pulverizing the ceramic waste, ceramic fine powder is obtained; the ceramic fine powder, graphite powder, magnesium powder Mix evenly, pass in protective gas and burn at 600-700°C for 1-2 h, heat up to 950-1100°C and burn for 1-2 h, take it out after cooling, and pulverize again to obtain secondary powder; Sodium phosphate, tuff, and mineralizer are mixed, sprayed and mixed, granulated, and polished to obtain ceramic primary particles, and the protective gas is introduced, and the ceramic primary particles are fired at 1150-1210°C for 0.5-1 h, and then continue to heat up to 1250°C ‑1350℃ for 1‑2 h. The preparation of high-strength proppant for oil and gas fracturing by using the ceramic waste of insulation board provides a new direction for the treatment of construction waste.

Description

technical field [0001] The invention relates to a proppant for oil fracturing, in particular to a method for preparing a high-strength proppant for oil and gas fracturing by utilizing ceramsite waste. Background technique [0002] During oil and gas deep well mining, high closure pressure and low permeability deposits are treated by fracturing to crack the oil-gas-bearing rock formations, and oil and gas are collected from the channels formed by the fractures. At this time, fluids need to be injected into the rock base to overcome formation fractures Intensive pressure creates cracks in the rock formations around the wellbore, forming a channel with high-level flow capability. In order to keep the cracks formed after fracturing open, oil and gas products can pass through smoothly. Petroleum proppant is used to enter the formation along with the high-pressure solution to fill in the fractures of the rock formation, which plays a role in supporting the fractures from closing d...

AI Technical Summary

Problems solved by technology

Natural petroleum proppants mainly include natural quartz sand, glass balls, metal balls, etc., but their strength is low. Using high-quality bauxite, coal and other raw materials for ceramic sintering to prepare petroleum fracturing proppants can effectively improve the strength of proppants. Instead of natural petroleum proppant, it is used for downhole support in oilfields to increase the production of oil and gas

[0003] The thermal insulation board made of foamed ceramics is a high-porosity closed-cell ceramic material calcined at high temperature, which has light weight, small deformation coefficient, anti-aging, stable performance, and good compatibility with the exterior wall base and stucco layer and other characteristics, has been widely promoted and applied in China, but its texture is brittle and its toughness is poor. With the continuous progress of thermal insulation technology, it is also necessary to replace the thermal insulation board. to process

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