Low-density high-strength petroleum fracturing propping agent ceramsite and preparation method thereof

Abstract

The invention discloses low-density high-strength petroleum fracturing propping agent ceramsite and a preparation method thereof. According to used raw materials, a weight ratio of glass phase-enriched low bauxite to brown fused alumina dust wastes in a ceramsite inner core is (80-20):20:80; and a weight ratio of corundum-enriched low bauxite to brown fused alumina dust collection micro powder to brown fused alumina tailings to titanium dioxide to manganous-manganic oxide in a ceramsite shell is (70-80):(10-8):(10-12):(5-2):(5-3), wherein the Al2O3content in the low bauxite is 60 to 65 percent; main ingredients of brown fused alumina smelting wastes are Al2O3, K2O, Na2O, SiO2 and Fe2O3; the content of Al2O3 in the brown fused alumina dust collection micro powder is 80 to 85 percent; and the Al2O3content in the brown fused alumina tailings is 72 to 80 percent.

Description

technical field [0001] The invention relates to a low-density and high-strength petroleum fracturing proppant ceramsite and a preparation method thereof, belonging to the field of oil and gas exploitation. Background technique [0002] Petroleum fracturing proppant is widely used in deep oil and gas exploitation process, which can improve the recoverability and output of oil and gas. Appropriate oil fracturing support is an important factor to improve the efficiency of fracturing operations. The effective support of deep oil and gas wells increases the conductivity of the formation and increases the production of oil or gas. At present, quartz sand, a commonly used fracturing proppant in China, is cheap and has a low relative density, which is convenient for pumping construction. However, quartz sand has low strength, poor roundness and sphericity, and high fracture rate, which reduces the conductivity of fractures, and is not suitable for deep wells with high closure press...

AI Technical Summary

Problems solved by technology

However, the relative density of ceramsite is relatively high, which puts forward higher requirements on pumping conditions and fracturing technology, increases the difficulty of construction, and is easy to cause accumulation at the port during construction, which is not good for flow diversion and affects oil production in the later stage. Great effect