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Propping agent particles and preparation method thereof

A technology of proppant and particles, which is applied in the direction of earthwork drilling, production fluid, wellbore/well components, etc., and can solve the problems of poor fracture-making conductivity, affecting fracture-making ability, affecting fracture conductivity, etc.

Inactive Publication Date: 2011-07-20
BEIJING RECHSAND SCI & TECH GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the commonly used proppants for fracturing are ordinary quartz sand and ordinary ceramsite. Ordinary quartz sand is relatively cheap, but its strength is not high. Moreover, ordinary quartz sand and ceramsite proppants both have the defect of high friction in the oilfield application process. , which increases the resistance of the proppant when it enters the deep part of the reservoir for fracture creation, which affects its fracture creation ability, which in turn affects the fracture conductivity
[0003] In addition, there is also a fracturing proppant in the prior art, which uses resin to coat quartz sand particles. However, this kind of proppant still has the defect of high friction resistance, so the resistance in the process of oil production and fracture creation is still very large , still can't solve the problem of poor drainage capacity of seams

Method used

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  • Propping agent particles and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0037] Heat 5% by mass of furan resin to its melting point, add 1% by mass of calcium fluoride to the molten furan resin, and stir evenly; add 0.1 to the 20 / 40 mesh quartz sand with 92% by mass % Silane coupling agent KH550, stir evenly; heat the quartz sand treated with silane coupling agent to 300℃, add the treated furan resin during heating and stir evenly; add 1% curing agent benzenesulfonate after cooling Acid chloride; adding 0.9% lubricant polyethylene wax and stirring uniformly; cooling the above mixture, crushing and sieving to obtain phenolic resin coated sand proppant, that is, low friction proppant.

Embodiment 2

[0039] Heat 30% by mass phenolic resin to its melting point, add 8% by mass calcium fluoride to the molten phenolic resin, and stir evenly; add 0.1 to 60% by mass 20 / 40 mesh quartz sand % Silane coupling agent KH550, stir evenly; heat the quartz sand treated with silane coupling agent to 100°C, add the treated phenolic resin during the heating process and stir evenly; add 1% curing agent imidazole after cooling; Adding 0.9% of lubricant polyethylene wax and mixing uniformly; cooling the above mixture, crushing and sieving to obtain phenolic resin coated sand proppant, that is, low friction proppant.

Embodiment 3

[0041] Heat 3% polystyrene to its melting point temperature, add 5% total mass percentage of polytetrafluoroethylene to the molten polystyrene, and stir evenly; for 20 / 40 mesh, 95% mass percentage of quartz Add 0.4% silane coupling agent KH550 to the sand and stir evenly; heat the quartz sand treated with the silane coupling agent to 400°C, add the treated polystyrene during the heating process and stir evenly; add 1% after cooling down The solidifying agent hexamethylenetetramine; adding 0.5% lubricant stearic acid amide and stirring uniformly; cooling the above mixture, crushing, and sieving to obtain polystyrene coated sand proppant, that is, low friction proppant.

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Abstract

The invention discloses propping agent particles and a preparation method thereof. The propping agent particles comprise aggregate particles and a resin coating film for coating the aggregate particles, wherein the resin coating film comprises a low-friction additive; and the low-friction additive is a laminar solid material, an inorganic compound, a high polymer or any combination of the materials. The preparation method comprises the following steps of: 1, heating resin to be coated with a film to the melting point temperature and adding the low-friction additive into the molten resin; 2, adding the aggregate particles, adding the resin obtained in the step 1 into the aggregate particles, and stirring uniformly; and 3, cooling the mixture obtained in the step 2 and smashing to obtain film-coated propping agent particles. In the method, the low-friction additive is added into the resin, and the aggregate particles are coated with the film, so that the low-friction film-coated propping agent is obtained. The propping agent has the characteristics of low density, high intensity, temperature resistance, pressure resistance and low friction.

Description

Technical field [0001] The invention relates to the technical field of proppants, in particular to a coated quartz sand particle for oil production and a preparation method thereof. Background technique [0002] Fracturing technology plays an important role in the development of low-permeability oilfields and is an important technical measure for increasing oil and gas well production and water well injection. At present, the commonly used proppants for fracturing are ordinary quartz sand and ordinary ceramsite. Ordinary quartz sand is relatively cheap, but its strength is not high. In addition, ordinary quartz sand and ceramsite proppants have the defect of high friction during oilfield application. , Which increases the resistance of the proppant when it enters the deep part of the reservoir to make fractures, which affects its fracture-forming ability and thus the fracture conductivity. [0003] In addition, there is also a fracturing proppant in the prior art, which coats quar...

Claims

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Application Information

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IPC IPC(8): C09K8/80
Inventor 秦升益郭盛昌王胜利胡宝苓
Owner BEIJING RECHSAND SCI & TECH GRP
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