Spinel high-strength petroleum fracturing proppant and production method thereof

Abstract

The invention relates to spinel high-strength petroleum fracturing proppant and a production method thereof. The proppant comprises the following raw materials: 63-70% of raw bauxite, 5-10% of forsterite, 2.5-6% of dolomite, 0.5-3% of boric acid, 3-7% of manganese ore powder and 13-20% of magnesium spinel. The production method comprises the following steps of: respectively grinding each raw material into fine powder during the preparation and screening by a 320-mesh sieve; mixing uniformly to obtain a mixture, then feeding the mixture to a rotary granulator while adding atomized moisture, preparing the mixed material into round grains and screening by a sieve with 18-30 meshes to obtain a half-finished product; drying the half-finished product till the moisture content is less than 6%; and transferring the dried half-finished product to a rotary kiln to bake, controlling temperature of a kiln head to be 1285 to 1400 DEG C and temperature of a kiln end to be 280 to 325 DEG C and burning for 6-8h and the discharging out of the kiln. According to the invention, the raw materials form a large amount of magnesium aluminate spinel phases at high temperature so as to play a supporting role of a skeleton; the obtained spinel high-strength petroleum fracturing proppant has the advantages of good compactness and strong anti-crushing capacity; the breakage rates of the spinel high-strength petroleum fracturing proppant at 52 MPa, 69 MPa and 86 MPa respectively are respectively less than 3.5%, less than 7.5% and less than 10.5%, the strength of the spinel high-strength petroleum fracturing proppant is higher than that of the products of the same kind and the performance of the spinel high-strength petroleum fracturing proppant is excellent; and meanwhile, the production techniqueis optimized, low in cost and easy to promote and implement.

Description

technical field

[0001] The invention relates to a fracturing proppant used in the petroleum industry, in particular to a spinel high-strength petroleum proppant and a production method thereof. Background technique

[0002] Fracturing proppants are required in the fracturing process of oil and natural gas deep well mining to provide high-permeability channels for oil and gas circulation, maintain high conductivity, and increase oil and gas production. my country's petroleum industry generally refers to proppants with a pressure bearing capacity of 69MPa and 86MPa as high-strength ceramsite proppants. After searching, the patent application with application number 200410010272.6 discloses a ceramsite proppant and its preparation method, and its raw material composition is: Al 2 o 3 74-80%, SiO 2 5.5-10.5%, Fe 2 o 3 4-9%, TiO 2 2.5-3.5%. Stir the above raw materials evenly, roll them into balls through water vapor atomization, and sinter at high temperature. The p...

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