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Super-low density ceramic proppant and preparation method thereof

A technology of ultra-low density and proppant, which is applied in chemical instruments and methods, earthwork drilling, mining fluids, etc. It can solve the problems of high density and increase the difficulty of construction, achieve low density, improve the ability to resist crushing, and reduce density Effect

Active Publication Date: 2015-12-09
辽宁隆源砂业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the density of ceramsite is higher than that of quartz sand, which puts forward higher requirements for pumping conditions and performance of fracturing fluid, which increases the difficulty of construction.

Method used

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Examples

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Effect test

preparation example Construction

[0023] The preparation method of the ultra-low density ceramsite proppant provided by the present invention comprises the following steps:

[0024] 1) Production of material A, wherein the ingredients contained in material A are bauxite, fly ash, clay and pore-enhancing agent, and the four ingredients are ground and mixed in proportion to obtain material A;

[0025] 2) Production of material B, wherein the ingredients contained in material B are bauxite, coal fly ash and manganese ore, and the three components are ground and mixed to obtain material B;

[0026] 3) Granulation, add material A into the pan-type ball forming machine, and add water to granulate by spraying method. When the particle size reaches the first particle size range, that is, the range of 0.1mm to 0.7mm, for example, it includes the following Specifications: 0.1-0.3mm, 0.1-0.4mm or 0.3-0.7mm. Gradually add material B during spraying and adding water. After the particle size reaches the second particle size...

Embodiment 1

[0034] Grind 2.5kg of bauxite, 3.0kg of fly ash, 4.0kg of clay, and 1.0kg of coal powder into a mixture with a particle size not greater than 325 mesh, and mix it evenly to form material A.

[0035] 7kg of bauxite, 2.5kg of fly ash and 0.5kg of manganese ore powder are ground into a mixture with a particle size not greater than 325 mesh, and mixed evenly to form B material.

[0036] Slowly add material A into the ball forming machine, add water to granulate by spraying method, control the particle size between 0.2mm and 0.4mm, then gradually add material B in the process of spraying and adding water, make the ball grow gradually, and control the particle size at 0.5mm Between mm ~ 0.9mm, the particles are dried and screened at 100 ~ 200 ° C, then enter the crucible, gradually increase the temperature in the muffle furnace, calcined at 1200-1250 ° C for 2.5 hours, after natural cooling, sieve according to particle size specifications A low-density proppant can be obtained. The...

Embodiment 2

[0038] Grind 2.5kg of bauxite, 2.5kg of fly ash, 5.0kg of clay, and 0.5kg of coal powder into a mixture with a particle size not greater than 325 mesh, and mix well to form material A.

[0039] 6kg of bauxite, 2.0kg of fly ash and 1.0kg of manganese ore powder are ground into a mixture with a particle size not greater than 325 mesh, and mixed evenly to form material B.

[0040] Slowly add material A into the ball forming machine, add water to granulate by spraying method, control the particle size between 0.3mm and 0.7mm, then gradually add material B in the process of spraying and adding water, make the ball grow gradually, and control the particle size at 0.5mm Between mm ~ 0.9mm, the particles are dried and screened at 100 ~ 200 ° C, then enter the crucible, gradually increase the temperature in the muffle furnace, calcined at 1200-1250 ° C for 2.5 hours, after natural cooling, sieve according to particle size specifications A low-density proppant can be obtained.

[0041]...

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Abstract

The invention discloses a preparation method of a super-low density ceramic proppant and the proppant prepared by using the method. The proppant provided by the invention is obtained through the following steps: in a preparation process, taking bauxite, coal ash and clay as an inner core, adding an inner core pore-forming material, taking bauxite, coal ash and manganese ore powder as a shell, and performing pelletizing, sintering and screening. The invention provides a low-density higher-intensity proppant which can adapt to stratums with medium and high closing pressure, effectively reduces the running cost of oil field auxiliary equipment, reduces the consumption of fracturing fluid, alleviates the damage of the fracturing liquid to the stratums, and brings huge economic benefit for an oil field.

Description

technical field [0001] The invention relates to a proppant used in an oil-gas fracturing process, in particular to a preparation method of an ultra-low-density ceramsite proppant and the proppant produced by the method. Background technique [0002] With the depletion of oil and gas resources in my country and the world, people have to develop low-permeability oil and gas reservoirs that are difficult to recover. Due to the low formation permeability of oil and gas reservoirs, fracturing means must be used to obtain economic oil (gas) flow, and fracturing fluid must be used to carry proppant into the formation to prevent the formation from reclosing. [0003] Currently commonly used fracturing proppants include quartz sand, ceramsite, and resin-coated particles. Among them, the price of quartz sand is the cheapest, its relative density is low, and it is convenient for construction and pumping. However, quartz sand has low strength, poor sphericity, and high breakage rate, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/80
CPCC09K8/80
Inventor 侯孟婧陈文将贾煜
Owner 辽宁隆源砂业有限公司
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