Polyvinyl-alcohol-containing expansion material composition, self-suspending proppant, and application and preparation method of self-suspending proppant

A technology of expanding materials and polyvinyl alcohol, which is applied in drilling compositions, chemical instruments and methods, and earthwork drilling and mining, can solve the problems of polluting the environment and blocking oil outlets with thickeners, and achieves low environmental pollution, Conducive to environmental protection, good drainage effect

Inactive Publication Date: 2017-07-07
BEIJING RECHSAND SCI & TECH GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a kind of expansion material composition and self-suspending proppant and the preparation method and application of proppant, to overcome the need to add thickener to the fracturing fluid in the prior art to complete the transportation of proppant Defects of thickener blocking the oil outlet and polluting the environment

Method used

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  • Polyvinyl-alcohol-containing expansion material composition, self-suspending proppant, and application and preparation method of self-suspending proppant
  • Polyvinyl-alcohol-containing expansion material composition, self-suspending proppant, and application and preparation method of self-suspending proppant

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preparation example Construction

[0033] The third aspect of the present invention provides the preparation method of the self-suspending proppant of the second aspect of the present invention, the method comprising: (1) uniformly dispersing and mixing the proppant body, the binder and the curing agent at the first temperature, wherein, The weight ratio of the proppant body, the binder and the curing agent is 1: (0.001-0.3): (0.001-0.1); (2) the proppant body and the expansion material composition are uniformly dispersed and mixed at the second temperature The expansion material composition is coated or partially coated on the proppant body to obtain a granular self-suspending proppant, wherein the mass ratio of the expansion material composition to the proppant body is 1: (10-1000) .

[0034] The preparation method of the self-suspending proppant of the present invention can coat the expansion material composition on the surface of the proppant body, and the obtained self-suspension proppant can use water as ...

Embodiment 1

[0040] This example is used to illustrate the expansive material composition of the present invention and the self-suspending proppant prepared from the expansive material composition and its preparation method.

[0041] Take 10g of polyvinyl alcohol (purchased from Shenzhen Boshun Chemical Co., Ltd., with a weight-average molecular weight of 74800) and 0.1g of gum arabic (purchased from Nanjing Senbega Biotechnology Co., Ltd.) to be used as an expansion material combination.

[0042] Take 1kg of quartz sand with an average particle size of 20-40 mesh as aggregate, heat to 200°C, add 10g of epoxy resin E-35 (637) and 1g of curing agent phthalic anhydride, stir, cool down to 140°C and add The expansion material composition obtained above is stirred evenly. Cool and sieve to obtain the self-suspending proppant of this embodiment.

Embodiment 2

[0044] This example is used to illustrate the expansive material composition of the present invention and the self-suspending proppant prepared from the expansive material composition and its preparation method.

[0045] Take 20g of polyvinyl alcohol (purchased from Shenzhen Boshun Chemical Co., Ltd., with a weight average molecular weight of 74800) and 0.1g tragacanth gum (purchased from Zhejiang Lvzhou Biotechnology Co., Ltd.) of 17-88 and mix it as an expansion material combination things.

[0046] Take 1 kg of ceramsite with an average particle size of 50-100 mesh as aggregate, heat to 180°C, add 20g of bisphenol A type unsaturated polyester resin 197 and 2g of curing agent benzoyl peroxide, cool down to 120°C and add the above The obtained expanding material composition is stirred evenly. Cool and sieve to obtain the self-suspending proppant of this embodiment.

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Abstract

The invention discloses an expansion material composition, comprising polyvinyl alcohol and a natural macromolecular material, wherein the mass ratio of the polyvinyl alcohol to the natural macromolecular material is (10-600):1; in addition, a self-suspending proppant prepared with the expansion material composition and a preparation method and application of the self-suspending proppant are disclosed. The self-suspending proppant prepared with the expansion material composition has no need for fracturing with a fracturing liquid that has added organic macromolecules and high cost, but uses easily-accessible natural water to carry out fracturing, and therefore, contamination is relieved and the cost is lowered; the self-suspending proppant prepared with the expansion material composition may suspend after being mixed with water, can suspend for a long time and has good flow guidance, sand blocking chances during fissure filling can be effectively reduced, the conveying range is wider, and oil/gas production is higher.

Description

technical field [0001] The invention relates to the field of mineral mining, in particular to an expansive material composition, a self-suspension proppant and a preparation method and application thereof. Background technique [0002] Oil and natural gas play an important role in the development of my country's national economy. After more than half a century of exploitation of my country's land oil and gas resources, many oil wells have begun to age or even dry up, which is becoming more and more important for the effective exploitation and production increase of oil fields. [0003] At present, the main measure for increasing production of oil and gas wells is hydraulic fracturing technology, which uses fracturing equipment such as high-pressure pumps on the ground to continuously inject ultra-high-viscosity fracturing fluid beyond its absorption capacity into the oil layer through the wellbore, so that the oil layer is formed on the oil layer. With the continuous injecti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/80
CPCC09K8/805
Inventor 秦升益王中学
Owner BEIJING RECHSAND SCI & TECH GRP
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