Self-suspension hydrofracturing coated proppant with targeting function as well as preparation and application

A hydraulic fracturing and proppant technology, which is applied in drilling compositions, chemical instruments and methods, and production fluids, etc., can solve the problems of low strength and density, high cost, and easy damage to the interface between aggregate and resin membrane. , to achieve the effect of tight integration and enhanced connection

Active Publication Date: 2020-02-04
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with traditional proppants, film-coated proppants have the characteristics of high strength, low density, corrosion resistance, and high conductivity. However, the resin film on the proppant is generally very thin. When the film is incomplete, the aggregate and resin film The interface between them is easily damaged. In addition, due to its rapid settlement and high cost, it still cannot meet the needs of the site well.

Method used

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  • Self-suspension hydrofracturing coated proppant with targeting function as well as preparation and application
  • Self-suspension hydrofracturing coated proppant with targeting function as well as preparation and application
  • Self-suspension hydrofracturing coated proppant with targeting function as well as preparation and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0084] (1) Prepare the following materials: 300 parts of aggregate, 5 parts of phenolic resin, 40 parts of ethanol, 0.2 part of carbon quantum dot particles, and 0.2 part of single-layer graphene powder.

[0085] (2) Proportion the phenolic resin and ethanol in the step (1) to the resin solution in a ratio of 50g:500ml, mechanically stir at 800rpm for 10min at room temperature, and seal the beaker during stirring to reduce the volatilization of ethanol.

[0086] (3) Pour the aggregate, carbon quantum dot particles and single-layer graphene powder in the step (1) into the resin solution while stirring, and mechanically stir at 600rpm for 2min under normal temperature conditions, so that it is uniform in the resin solution distributed.

[0087] (4) Evenly filter the mixture in step (3) into water through a 40-mesh screen, let it stand at room temperature for 5 minutes, put it into a bellows, dry it at 80° C. for 5 hours, and take it out.

[0088] (5) After drying, due to the pa...

Embodiment 2

[0090] (1) Prepare the following materials: 300 parts of aggregate, 5 parts of phenolic resin, 40 parts of acetone, 0.2 part of carbon quantum dot particles, and 0.2 part of single-layer graphene powder.

[0091] (2) Proportion the resin solution with the phenolic resin and acetone in the ratio of 50g:500ml in step (1), mechanically stir at 800rpm at normal temperature for 10min, seal the beaker during the stirring process to reduce volatilization of acetone.

[0092] (3) Pour the aggregate, carbon quantum dot particles and single-layer graphene powder in the step (1) into the resin solution while stirring, and mechanically stir at 600rpm for 2min under normal temperature conditions, so that it is uniform in the resin solution distributed.

[0093] (4) Evenly filter the mixture in step (3) into water through a 40-mesh screen, let it stand at room temperature for 5 minutes, put it into a bellows, dry it at 80° C. for 5 hours, and take it out.

[0094] (5) After drying, due to ...

Embodiment 3

[0096] (1) Prepare the following materials: 300 parts of aggregate, 5 parts of phenolic resin, 35 parts of ethanol, 0.1 part of carbon quantum dot particles, and 0.1 part of single-layer graphene powder.

[0097] (2) Mix the resin solution with the phenolic resin and ethanol in the mass ratio of 1:7, mechanically stir at 800 rpm for 10 minutes at room temperature, and seal the beaker during stirring to reduce ethanol volatilization.

[0098](3) Pour the aggregate, carbon quantum dot particles and single-layer graphene powder in the step (1) into the resin solution while stirring, and mechanically stir at 600rpm for 2min under normal temperature conditions, so that it is uniform in the resin solution distributed.

[0099] (4) Evenly filter the mixture in step (3) into water through a 20 / 40 mesh screen, let it stand at room temperature for 5 minutes, put it into a bellows, dry it at 80° C. for 5 hours, and take it out.

[0100] (5) After drying, due to the partial agglomeration...

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Abstract

The invention provides a self-suspension hydrofracturing coated proppant with a targeting function as well as preparation and application. The proppant comprises: A particles existing in the quantityof 70%-99.99% of total weight of the proppant and B a nanoparticle enhanced porous composite coating which coats the surfaces of particles and exists in the quantity of 0.01%-30% of total weight of the proppant, and the nanoparticle enhanced porous composite coating comprises nanoparticles (preferably, the weight of nanoparticles is 1%-50% (preferably, 10%-20%) of total weight of the nanoparticleenhanced porous composite coating) and a porous composite. Compared with a functional coated proppant produced by a traditional process, the method has the advantages that materials such as resin usedin the method come from industrial production, the nanoparticles are creatively added to improve performance of the proppant, and the method has more simplified operation process and more saved production cost.

Description

technical field [0001] The invention belongs to the technical field of petrochemical industry, and in particular relates to a self-suspension hydraulic fracturing coating proppant with targeting function and its preparation and application. Background technique [0002] With the massive exploitation of energy such as oil and natural gas, people are gradually turning their attention to the development and utilization of unconventional energy such as shale gas. Although China has huge reserves of unconventional energy, it has not been fully utilized due to the limitation of mining technology. [0003] Most unconventional reservoirs are characterized by low porosity and low permeability, so hydraulic fracturing is required for reservoir reconstruction. Hydraulic fracturing needs to use fracturing fluid to carry a large amount of proppant and pump it into the ground at high pressure and high speed to fill the fractures. Everywhere, by supporting fractures to prevent fractures f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/80
CPCC09K8/805C09K2208/10
Inventor 徐泉金衍
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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