Ultralow-density ceramisite sand proppant and preparation method thereof

Abstract

The invention discloses an ultralow-density ceramisite sand proppant and a preparation method thereof. The ultralow-density ceramisite sand proppant is prepared from the following raw materials in percentage by weight: 15-20% of purple clay, 10-15% of silica and 65-75% of raw aluminum ores. The preparation method comprises the following steps: crushing the required raw materials at first, then performing blending and grinding, and putting obtained fine powder into a granulator for granulation; and screening obtained raw granules after granulation, then calcining in a rotary kiln, cooling, and finally screening again to obtain a product. The ceramisite sand proppant prepared by the method disclosed by the invention has the advantages of ultralow volume density, relatively low apparent density, relatively high crushing resistance and good surface finish quality. By using the ultralow-density ceramisite sand proppant disclosed by the invention, the exploitation cost of an oil field can be reduced, and the yield of the oil field can be increased.

Description

technical field [0001] The invention relates to a ceramsite sand proppant and a preparation method thereof, in particular to an ultra-low density ceramsite sand proppant. Background technique [0002] Ceramsite sand is a high-strength proppant used in the hydraulic fracturing technology of oil exploitation to support hydraulic fractures. It is one of the essential materials in the development of oil and gas fields. Its main raw materials are bauxite, manganese ore, dolomite and iron Ore, etc.; with the continuous exploitation and utilization of the above-mentioned raw material resources, the price is gradually rising and the reserves are decreasing year by year, so it is difficult to purchase raw materials and the cost is high; at present, there are many types of oil fracturing proppant, including ceramsite sand, quartz Sand and resin sand, the price of resin sand is higher, the strength grade of quartz sand is lower, the price of existing ceramsite sand in the market is mod...

AI Technical Summary

Problems solved by technology

[0002] Ceramsite sand is a high-strength proppant used in the hydraulic fracturing technology of oil exploitation to support hydraulic fractures. It is one of the essential materials in the development of oil and gas fields. Its main raw materials are bauxite, manganese ore, dolomite and iron Ore, etc.; with the continuous exploitation and utilization of the above-mentioned raw material resources, the price is gradually rising and the reserves are decreasing year by year, so it is difficult to purchase raw materials and the cost is high; at present, there are many types of oil fracturing proppant, including ceramsite sand, quartz Sand and resin sand, the price of resin sand is higher, the strength grade of quartz sand is lower, the price of existing ceramsite sand in the market is moderate, but the density is generally higher, the amount of sand required per unit area of ​​hydraulic cracks is larger, so increase The cost of fracturing when the oil field is produced

The existing ceramsite sand is made of bauxite, cooling agent manganese ore sand and dolomite. After these materials are mixed and sintered, the surface of the ceramsite sand is enlarged and has burrs and the surface is uneven. After accumulation, the gap in the middle of the sand The channels formed are not uniform, the relative flow back ability is low, and the production of oil wells using this type of sand is low