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Low-density ceramic proppant and preparation method thereof

A low-density, proppant technology, applied in the direction of earthwork drilling, mining fluid, wellbore/well components, etc., can solve the problems of low strength and inability to support fractures, increase the compressive strength, solve environmental pollution and arable land Occupancy problem, glass phase reduction effect

Active Publication Date: 2010-07-28
阳泉市长青石油压裂支撑剂有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above patents are for the production of lightweight ceramsite, but the strength is very low and cannot meet the requirements of supporting cracks

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0017] Example 1: Mix 3 kilograms of coal gangue and 7 kilograms of bauxite in a mixer evenly, then put them into a disc-type ball forming machine to rotate, slowly spray into a 0.2% sodium silicate aqueous solution and rotate into balls, and make 0.2 ~ 0.3mm inner core, and then gradually add the mixture of bauxite and trimanganese tetroxide (the amount of trimanganese tetraoxide accounts for 7% of the total mass of the shell material) during the water spraying process, so that the sphere grows gradually, and the particle size Raw meal particles controlled between 0.6-0.95mm are dried at 100-200°C, put into a crucible, gradually heated up in a muffle furnace, roasted at 1350-1370°C for 3 hours, and measured their bulk density after cooling 1.55g / cm 3 , apparent density 2.77g / cm 3 , The broken rate is 5.5% under the condition of 52MPa.

example 2

[0018] Example 2: Mix 4 kilograms of coal gangue and 6 kilograms of bauxite in a mixer evenly, then put them into a disc-type ball forming machine and rotate them, slowly inject a 0.5% sodium silicate aqueous solution and rotate them into balls, and make 0.2 ~ 0.3mm inner core, and then gradually add the mixture of bauxite and trimanganese tetroxide (the trimanganese tetraoxide accounts for 7% of the mass of bauxite) during the water spraying process, so that the sphere grows gradually and the particle size is controlled. Raw meal particles between 0.6 and 0.95 mm are dried at 100 to 200 ° C, put into a crucible, gradually heated up in a muffle furnace, roasted at 1330 to 1350 ° C for 3 hours, and measured its bulk density after cooling to 1.50 g / cm 3 , apparent density 2.65g / cm 3 , The broken rate is 6.5% under the condition of 52MPa.

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PUM

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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...

Claims

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Application Information

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IPC IPC(8): C09K8/80
Inventor 李占刚马晓娟郝景华
Owner 阳泉市长青石油压裂支撑剂有限公司
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