Ultralow density ceramsite proppant and preparation method thereof

An ultra-low density, proppant technology, applied in the gas well fracturing process proppant, oil field, can solve the problems of wasting resources, occupying land, environmental pollution, etc. Effect

Inactive Publication Date: 2017-07-21
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Long-term stacking of a large amount of coal gangue not only occupies land, wastes resources, but also pollutes the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The ultra-low density ceramsite proppant described in this embodiment, the mass percent of raw material is as follows:

[0029] Calcined coal gangue 60%, uncalcined coal gangue 25%, alumina powder 11%, aluminum fluoride 1%, vanadium pentoxide 3%.

[0030] The raw material technical index is coal gangue (Al 2 o 3 :36.18wt%, SiO 2 :44.48 wt%, Fe 2 o 3 :0.34wt%, TiO 2 : 0.71wt%, CaO: 0.42wt%, K 2 O: 0.18wt%, Na 2 O: 0.034wt%, MgO: 0.19wt%, other burning loss); alumina powder (Al 2 o 3 content 90wt%); aluminum fluoride, vanadium pentoxide (content 99wt%).

[0031] The preparation steps are as follows:

[0032] The coal gangue is calcined at 600°C for 1.5 hours, and then crushed to obtain calcined gangue raw materials; it is weighed according to the mass percentage of the calcined coal gangue, uncalcined coal gangue, alumina powder, aluminum fluoride and vanadium pentoxide. After taking it, mix it evenly and grind it until the fineness is less than 400 meshes to o...

Embodiment 2

[0035] The ultra-low density ceramsite proppant described in this embodiment, the mass percent of raw material is as follows:

[0036] Calcined coal gangue 45%, uncalcined coal gangue 30%, alumina powder 20%, aluminum fluoride 3%, vanadium pentoxide 2%.

[0037] The raw material technical index is coal gangue (Al 2 o 3 :36.18wt%, SiO 2 :44.48 wt%, Fe 2 o 3 :0.34wt%, TiO 2 : 0.71wt%, CaO: 0.42wt%, K 2 O: 0.18wt%, Na 2 O: 0.034wt%, MgO: 0.19wt%, other burning loss); alumina powder (Al 2 o 3 content 80wt%); aluminum fluoride, vanadium pentoxide (content 99wt%).

[0038] The preparation steps are as follows:

[0039] The coal gangue is calcined at 750°C for 1 hour, and then crushed to obtain calcined coal gangue raw materials; weighed according to the mass percentage of the calcined coal gangue, uncalcined coal gangue, alumina powder, aluminum fluoride and vanadium pentoxide Afterwards, mix evenly and grind until the fineness is less than 400 meshes to obtain a mixed ma...

Embodiment 3

[0042] The ultra-low density ceramsite proppant described in this embodiment, the mass percent of raw material is as follows:

[0043] Calcined coal gangue 50%, uncalcined coal gangue 23%, alumina powder 20%, aluminum fluoride 2%, vanadium pentoxide 5%.

[0044] The raw material technical index is uncalcined coal gangue (Al 2 o 3 :36.18wt%, SiO 2:44.48 wt%, Fe 2 o 3 :0.34wt%, TiO 2 : 0.71wt%, CaO: 0.42wt%, K 2 O: 0.18wt%, Na 2 O: 0.034wt%, MgO: 0.19wt%, other burning loss); alumina powder (Al 2 o 3 content 80wt%); aluminum fluoride, vanadium pentoxide (content 99wt%).

[0045] The preparation steps are as follows:

[0046] The coal gangue is calcined at 900°C for 0.5h, and then crushed to obtain the calcined gangue raw material; it is weighed according to the mass percentage of the calcined coal gangue, uncalcined coal gangue, alumina powder, aluminum fluoride and vanadium pentoxide. After taking it, mix it evenly and grind it until the fineness is less than 400 mes...

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Abstract

The invention discloses an ultralow density ceramsite proppant and a preparation method thereof. The ultralow density ceramsite proppant is prepared from, by weight percent, 45-65% of calcined coal gangue, 25-30% of uncalcined coal gangue, 5-20% of alumina powder, 1-3% of aluminum fluoride, 3-5% of vanadium pentoxide. The ultralow density ceramsite proppant is prepared by kaolinite coal gangue with low cost and low volume density, and is applicable to hyposmosis unconventional oil and gas reservoir hydrofracture.

Description

technical field [0001] The invention relates to the technical field of proppants for oil and gas well fracturing techniques, in particular to an ultra-low-density ceramsite proppant prepared from kaolinite coal gangue and a preparation method thereof. Background technique [0002] In recent years, unconventional oil and gas reservoirs such as shale gas have been explored, developed and utilized, playing an important role in the energy structure. Unconventional oil and gas reservoirs are dense, low permeability, porosity less than 10%, and pore throats are mainly nanoscale (less than 1 μm). Therefore, the development of unconventional oil and gas reservoirs puts forward higher requirements for fracturing equipment and materials . [0003] Low-cost clean water fracturing has been successfully used in the development of low-permeability oil and gas reservoirs at home and abroad, providing very effective technical support for the stimulation of oil and gas wells. Clear water f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/80C04B33/132C04B33/13
CPCC04B33/131C04B33/132C04B2235/3217C04B2235/3239C04B2235/445C04B2235/77C09K8/80Y02P40/60
Inventor 高峰陈耀斌岳俊磊
Owner TAIYUAN UNIV OF TECH
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