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A kind of ultra-low density cordierite oil fracturing proppant and preparation method thereof

A fracturing proppant, ultra-low density technology, applied in chemical instruments and methods, clay products, earthwork drilling, etc., can solve the problems of low production efficiency in shallow low permeability oil and gas fields, and achieve excellent comprehensive performance The effect of reducing the sintering temperature

Active Publication Date: 2019-01-22
洛阳赛罗帕陶瓷科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In order to solve the problem of low production efficiency in medium and shallow low-permeability oil and gas fields, the present invention provides an ultra-low density cordierite oil fracturing proppant and its preparation method. The proppant prepared by the method has a good appearance (circular Sphericity ≥ 0.9); lower bulk density and apparent density, the bulk density is 1.48~1.52 g / cm 3 , the apparent density is 2.56~2.62 g / cm 3 ; Acid solubility < 6.0%; and high resistance to crushing, its crushing rate under 52MPa closing pressure < 8.0%

Method used

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  • A kind of ultra-low density cordierite oil fracturing proppant and preparation method thereof

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Effect test

Embodiment 1

[0024] An ultra-low density cordierite petroleum fracturing proppant, the main crystal phase of the proppant is a cordierite structure, and according to the weight ratio, it consists of 75 parts of fly ash, 14 parts of lightly burned magnesium powder, 5 parts of It is prepared by firing Jiaozuo clay and 6 parts of a composite mineralizer, and the composite mineralizer is prepared by mixing manganese oxide and barium carbonate in an equal weight ratio.

[0025] The light-burned magnesium powder is a powder with an MgO content>92% obtained by pulverizing magnesite under an oxidizing atmosphere at 750° C. for 40 minutes.

[0026] In the fly ash, SiO 2 The mass percentage content of Al is 54%~57%, Al 2 o 3 The mass percentage of CaO is 20%~22%, the mass percentage of CaO is 6.0~8.5%, the loss on ignition is <1.5%, and the acid modulus is 2.5~3.0.

[0027] The Jiaozuo clay is a plastic clay with strong binding force, wherein SiO 2 The mass percentage content is 46%~48%, Al 2 ...

Embodiment 2

[0037] An ultra-low density cordierite petroleum fracturing proppant, the main crystal phase of the proppant is a cordierite structure, and according to the weight ratio, it consists of 77 parts of fly ash, 13 parts of lightly burned magnesium powder, 6 parts of It is prepared by firing Jiaozuo clay and 4 parts of a composite mineralizer, which is obtained by mixing manganese oxide and barium carbonate in an equal weight ratio.

[0038] The light-burned magnesium powder is a powder with an MgO content>92% obtained by grinding magnesite under an oxidizing atmosphere at 800° C. for 30 minutes and then pulverizing it.

[0039] In the fly ash, SiO 2 The mass percentage content of Al is 54%~57%, Al 2 o 3 The mass percentage of CaO is 20%~22%, the mass percentage of CaO is 6.0~8.5%, the loss on ignition is <1.5%, and the acid modulus is 2.5~3.0.

[0040] The Jiaozuo clay is a plastic clay with strong binding force, wherein SiO 2 The mass percentage content is 46%~48%, Al 2 o ...

Embodiment 3

[0048] An ultra-low density cordierite petroleum fracturing proppant, the main crystal phase of the proppant is a cordierite structure, and according to the weight ratio, it consists of 79 parts of fly ash, 11 parts of lightly burned magnesium powder, 5 parts of It is prepared by firing Jiaozuo clay and 5 parts of a composite mineralizer, and the composite mineralizer is prepared by mixing manganese oxide and barium carbonate in an equal weight ratio.

[0049] The light-burned magnesium powder is a powder with an MgO content >92% obtained by grinding magnesite under an oxidizing atmosphere at 775° C. for 35 minutes and then pulverizing it.

[0050] In the fly ash, SiO 2 The mass percentage content of Al is 54%~57%, Al 2 o 3 The mass percentage of CaO is 20%~22%, the mass percentage of CaO is 6.0~8.5%, the loss on ignition is <1.5%, and the acid modulus is 2.5~3.0.

[0051] The Jiaozuo clay is a plastic clay with strong binding force, wherein SiO 2 The mass percentage cont...

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Abstract

The invention provides an ultralow-density cordierite petroleum fracturing propping agent and a preparation method thereof. A principal crystalline phase of the popping agent is of a cordierite structure and is formed by firing coal ash, caustic-burned magnesia powder, Jiaozuo clay and a composite mineralizer, and the composite mineralizer is formed by mixing manganese oxide and barium carbonate according to the equal weight ratio. A large amount of high-silicone, low-aluminum, low-calcium and low-ignition-loss neutral coal ash is adopted as a main raw material, and the density index of the popping agent is effectively reduced; through the special processing and treating processes such as special pre-sintering on an important raw material magnesite and ultrafine grinding on batches and the composite mineralizer technology, it is effectively guaranteed that high-hardness and low-density principal crystalline phase minerals are formed in a system at high temperature, therefore, and it is guaranteed that the finished ultralow-density popping agent has high mechanical strength; the firing temperature of the popping agent is reduced, and the purposes of energy saving and consumption reduction are achieved.

Description

technical field [0001] The invention relates to a solid proppant for oil and gas well fracturing technology, in particular to an ultra-low density cordierite petroleum fracturing proppant and a preparation method thereof. Background technique [0002] In oil and gas extraction, so-called hydraulic fracturing is widely used. This technology uses a high-pressure pump set on the ground to inject fracturing fluid carrying proppant particles into the oil well through the wellbore, so that the lower part of the oil well forms a high pressure, causing cracks in the rock formation near the bottom of the well. As fracturing fluid is pumped in, the fractures in this rock formation are pushed forward and filled with proppant. When the fracturing operation is stopped, the proppant plays the role of balancing the formation pressure, keeping the rock fractures open and having a certain flow conductivity, so as to increase the production of oil and gas fields and extend the service life o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B33/135C04B33/13C04B35/195C09K8/80
CPCC04B33/131C04B33/1352C04B35/195C04B2235/3206C04B2235/3262C04B2235/442C04B2235/77C04B2235/94C04B2235/96C09K8/80Y02P40/60
Inventor 张国强廖桂华张玫李忠孝张国弘
Owner 洛阳赛罗帕陶瓷科技有限公司
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