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Curable proppant and its preparation method and application

A technology of proppant and curing agent, applied in chemical instruments and methods, earth-moving drilling, wellbore/well components, etc., can solve the problem of lack of consolidation strength of phenolic resin-coated sand, proppant back injection well injection ability, The proppant is not resistant to alkali and other problems, so as to achieve the effect of excellent storage stability, easy access and strong alkali resistance.

Active Publication Date: 2022-02-18
BEIJING QISINTAL NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the technical problems existing in the prior art, for example, the existing proppant is not alkali-resistant, and it is easy to cause problems such as no consolidation strength of the phenolic resin coated sand, regurgitation of the proppant, and decline in the injection capacity of the injection well. The present invention first Provides a curable proppant

Method used

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  • Curable proppant and its preparation method and application
  • Curable proppant and its preparation method and application
  • Curable proppant and its preparation method and application

Examples

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no. 1 approach

[0030] A first embodiment of the present invention provides a curable proppant. The curable proppant includes pre-cured membrane proppant, liquid epoxy resin A, latent curing agent, filler and flow modifier; wherein,

[0031] Based on the total weight of the pre-cured membrane proppant, the addition of the liquid epoxy resin A is 2%-6%; the addition of the latent curing agent is 0.2%-1.8%; The added amount of the filler is 10%-30%; the added amount of the flow modifier is 0.1%-1%.

[0032] The curable proppant of the present invention not only can be solidified in strong alkali liquid, has high consolidation strength, but also has good fluidity of particles and stable storage.

[0033]

[0034] The pre-cured film-coated proppant of the present invention is preferably a particle in which the aggregate is pre-cured and film-coated by using epoxy resin B, a coupling agent and a pre-curing agent. in particular:

[0035] aggregate

[0036] The aggregate in the pre-cured mem...

no. 2 approach

[0063] A second embodiment of the present invention provides a method for preparing a curable proppant according to the first embodiment of the present invention, which includes a step of mixing components of the curable proppant.

[0064] Specifically, the preparation method of the curable proppant comprises the following steps:

[0065] Step 1, taking the pre-cured coating proppant, liquid epoxy resin A and latent curing agent and mixing and curing to obtain a cured product;

[0066] Step 2, adding fillers and flow modifiers to the cured product and then dispersing to obtain a curable proppant.

[0067] Further, the preparation method of the curable proppant comprises the following steps:

[0068] Step 1. Mix the pre-cured film proppant, liquid epoxy resin A and latent curing agent at a temperature below 50°C, and stir for 30±10 seconds to cure to obtain a cured product;

[0069] Step 2, adding a filler and a flow modifier to the cured product and then dispersing to obtain...

no. 3 approach

[0074] The third embodiment of the present invention provides an application of the curable proppant according to the first embodiment or the curable proppant prepared according to the preparation method of the second embodiment in ASP flooding.

[0075] The curable proppant of the present invention can be solidified in a strong alkali liquid, has high consolidation strength, good fluidity of particles, stable storage, etc., and is suitable for ASP flooding.

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Abstract

The invention provides a curable proppant and its preparation method and application. The curable proppant includes: pre-cured film proppant, liquid epoxy resin A, latent curing agent, filler and flow modifier; wherein, based on the total weight of the pre-cured film proppant , the addition of the liquid epoxy resin A is 2%-6%; the addition of the latent curing agent is 0.2%-1.8%; the addition of the filler is 10%-30%; the The adding amount of the flow modifier is 0.1%-1%. The curable proppant of the present invention is stable in storage and strong in alkali resistance, and can be consolidated in a strong alkali liquid, for example: it can be consolidated in a sodium hydroxide solution with a mass concentration of 1.5% at a temperature above 40°C. Strength greater than 5MPa.

Description

technical field [0001] The invention relates to a curable proppant and its preparation method and application, in particular to a curable proppant for ASP flooding, which belongs to the technical field of tertiary oil recovery. Background technique [0002] Petroleum is a kind of mineral fluid stored in the ground, and it is an indispensable energy source for the development of industrialization. At present, most of my country's main oilfields have entered the period of high water-cut exploitation, the difficulty of oil exploitation is becoming more and more difficult, the rate of decline in production is gradually increasing, and the contradiction between supply and demand is becoming increasingly prominent. In order to alleviate the increasingly prominent contradiction between supply and demand, people use various methods to improve the recovery rate of existing oil fields. In recent years, it has been found that the ASP flooding technology containing alkali, surfactant a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/80C08G59/50C08G59/68
CPCC09K8/805C08G59/5033C08G59/686
Inventor 张伟民陈丽杨雪芹马永宇
Owner BEIJING QISINTAL NEW MATERIAL