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Fracturing proppant for shale gas development and preparation method thereof

A fracturing proppant and shale gas technology, which is applied in the fields of mining fluid, chemical instruments and methods, applications, etc., can solve the problems of high fragmentation rate, high acid solubility, weak compression resistance, etc., and achieve short preparation process and smooth finish Good, easy to use effect

Active Publication Date: 2017-08-25
HENAN TIANXIANG NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention provides a high-strength, low-acid-solubility fracturing proppant for the defects of weak compressive resistance, high fragmentation rate, and high acid solubility of the fracturing proppant currently used in shale gas development.

Method used

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  • Fracturing proppant for shale gas development and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0031] In this example, the fracturing proppant is used for shale gas development, and the raw materials are composed of the following components in mass percentage: 49% of low-grade bauxite, 48% of shale, 2% of barium carbonate, and 1% of boric acid.

[0032] In this embodiment, the preparation method of fracturing proppant for shale gas development includes the following steps:

[0033] (1) The low-grade bauxite and shale are crushed to less than 7mm through the experimental jaw crusher (jaw crusher), and then added to the Φ500mm ball mill for 6 hours, until the fineness of the powder reaches 400 mesh sieve respectively The remaining ≤ 5%;

[0034](2) In terms of mass percentage, prepare mixed powder according to 49% of low-grade bauxite, 48% of shale, 2% of barium carbonate, and 1% of boric acid, and first weigh 1.5kg of mixed powder and add it to the granulator , add 230g of water, adjust the drum speed to 500r / min, and the rotor speed to 3500r / min, add dry mixed powder i...

Embodiment 2

[0039] In this embodiment, the fracturing proppant is used for shale gas development, and the raw materials are composed of the following components in mass percentage: 46% of low-grade bauxite, 51% of shale, 1% of barium carbonate, and 2% of boric acid.

[0040] In this embodiment, the preparation method of fracturing proppant for shale gas development includes the following steps:

[0041] (1) respectively crush the low-grade bauxite and shale to less than 7mm by jaw crusher, and then add Φ500mm ball mill to grind them for 6 hours, until the fineness of the powder reaches 400 mesh sieve ≤ 5% respectively;

[0042] (2) In terms of mass percentage, prepare mixed powder according to 46% of low-grade bauxite, 51% of shale, 1% of barium carbonate, and 2% of boric acid, and first weigh 1.5kg of mixed powder and add it to the granulator , add 230g of water, adjust the drum speed to 500r / min, and the rotor speed to 3500r / min, add dry mixed powder in 4 times, add 100g each time, poli...

Embodiment 3

[0046] In this example, fracturing proppant is used for shale gas development, and the raw materials are composed of the following components in mass percentage: 47% of low-grade bauxite, 50% of shale, 2% of barium carbonate, and 1% of boric acid.

[0047] Among them, the low-grade bauxite adopts the low-grade bauxite around Gongyi, Henan, and its Al 2 o 3 The content is 50-60%, SiO 2 The content is 15-30%, and the aluminum-silicon ratio is relatively low. The shale adopts siliceous shale around Gongyi, Henan, and its Al 2 o 3 The content is 15-25%, SiO 2 The content is 35-50%, Fe 2 o 3 The content is 2-5%, the Platts hardness coefficient is 1.5-3.5, and the plasticity index is 5-20.

[0048] In this embodiment, the preparation method of fracturing proppant for shale gas development includes the following steps:

[0049] (1) respectively crush the low-grade bauxite and shale to less than 7mm by jaw crusher, and then add Φ500mm ball mill to grind them for 6 hours, until...

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Abstract

The invention belongs to the technical field of gas (oil) exploitation auxiliaries and discloses a fracturing propping agent for shale gas exploitation and a preparation method of the fracturing propping agent. The fracturing propping agent is composed of, by weight, 43-55% of bauxite, 43-55% of shale, 1-3% of barium carbonate and 1-2% of boric acid, wherein BaCO3 is added as a fluxing agent and a binding agent to prevent sintering by lowering the sintering temperature, a certain quantity of monoclinic celsian excellent in acid resistance is generated by Al2O3 and SiO2 to form a protective film on the surface of the propping agent, and accordingly the propping agent can be protected from corrosion of acidic and alkaline substances of rock stratums. The calcination temperature can be lowered by the boric acid, mullite in growth can be slowly wrapped by celsian melts by prolonging of sintering time, and accordingly porosity of blanks can be guaranteed to further improve compressive strength of the propping agent. In addition, corrosion resistance of the propping agent is improved owing to own acid resistance of the boric acid, and adverse effects of K2O, Na2O and the like in raw materials on acid solution can be reduced.

Description

technical field [0001] The invention relates to a fracturing proppant for shale gas development, and also relates to a preparation method of the fracturing proppant, belonging to the technical field of gas production (oil) additives. Background technique [0002] Shale gas is an unconventional natural gas resource. It is natural gas that occurs in shale and mudstone formations and their interlayers in the form of adsorption and dissociation. The main component is methane. Shale gas is often distributed in thick and widely distributed shale source rock formations in the basin. Compared with conventional natural gas, shale gas has the characteristics of long mining life, long production cycle, etc., and generally has high gas content, which enables shale gas wells to produce gas at a stable rate for a long time. my country's shale gas resources are very rich, and the preliminary estimate of the resources can reach 100 trillion cubic meters, which is equivalent to twice the am...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/80C04B33/13C04B35/185
CPCC04B33/131C04B35/185C04B2235/3215C04B2235/3217C04B2235/3409C04B2235/5427C04B2235/5436C04B2235/77C04B2235/80C04B2235/96C09K8/80
Inventor 张天成薛建国刘现伟
Owner HENAN TIANXIANG NEW MATERIALS
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