Propping agent particles and preparation method thereof

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...

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

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