Low-density ceramic proppant and preparation method thereof

Abstract

The invention relates to a low-density ceramic proppant and a preparation method thereof, which belong to the field of exploring petroleum and natural gas. The preparation method of the low-density ceramic proppant comprises the steps of forming an inner core made of bauxite and coal gangue and a shell made of bauxite and trimanganese tetroxide into a ball and sintering to obtain low-density ceramic. The ceramic has higher strength and low density and is applicable to a ceramic proppant for fracturing a deep-level oil-gas well with high closed pressure and low permeability; the sintering temperature is relatively reduced in the range of 1,300-1,380DEG C, so that thus the energy consumption is effectively reduced and the energy can be saved by 20 percent; and meanwhile, the effect with low crushing rate can be achieved.

Description

technical field

[0001] The present invention relates to the field of oil and natural gas exploitation, in particular to a low-density ceramsite proppant and a preparation method thereof. Background technique

[0002] To develop deep oil and gas wells and increase production, fracturing technology is widely used. In order to ensure the effective propping of fractures in deep underground formations, suitable proppant is necessary. It can increase the conductivity of the formation and increase the production of oil or gas, and is an important factor in the application of fracturing technology. At present, the commonly used fracturing proppants in China are quartz sand and ceramsite. Among them, the price of quartz sand is cheap, the relative density is low, and it is convenient for construction and pumping, but the strength of quartz sand is low, the sphericity is poor, and the breakage rate is high, which reduces the conductivity of fractures, and is especially not suitable f...