An environment-friendly high-strength resin-coated proppant

An environment-friendly resin and resin coating technology, which is applied in the direction of wellbore/well components, mining fluids, chemical instruments and methods, etc., can solve the problems of not meeting the requirements of acid dissolution, polluting the environment, and harming the environment and staff. Achieve the effect of protecting color, saving energy and saving cost

Active Publication Date: 2020-01-07
CHONGQING CHANGJIANG RIVER MOLDING MATERIAL GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The curing of phenolic and epoxy resins requires the addition of various curing agents, among which the most common curing agent is urotropine, which produces a large amount of ammonia at high temperatures, which is harmful to the environment and staff
Many fracturing fluids flowed back during fracturing operations will seriously pollute the environment due to the above reasons
In addition, the traditional domestic proppants are broken in the case of low-resin coatings, and many indicators such as acid solubility cannot meet the requirements.

Method used

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  • An environment-friendly high-strength resin-coated proppant
  • An environment-friendly high-strength resin-coated proppant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Heat 2 kg of quartz sand particles with a particle size of 1180 / 600 μm (16 / 30 mesh) to 120°C and put them in a sand mixer for stirring. After cooling to about 85°C, add 13.8 grams of environmental protection resin A, stir for 20 seconds, and add 0.1 g of lead organic acid (such as lead isooctanoate) and stir for 35 seconds, add 6.2 g of environmentally friendly resin B and stir for 60 seconds, add 2 g of calcium stearate and stir for 80 seconds, cool and sieve to obtain an environmentally friendly resin coating. membrane proppant.

Embodiment 2

[0025] Heat 2kg of quartz sand particles with a particle size of 850 / 425μm (20 / 40 mesh) to 120°C and put them in a sand mixer for stirring. After cooling to about 85°C, add 13.8 grams of environmental protection resin A, stir for 20 seconds, and add 0.1 g of lead organic acid (such as lead isooctanoate) and stir for 35 seconds; add 6.2 g of environmentally friendly resin B and stir for 60 seconds, add 2 g of calcium stearate and stir for 80 seconds, cool and sieve to obtain an environmentally friendly resin coating. membrane proppant.

Embodiment 3

[0027] Heat 2kg of quartz sand particles with a particle size of 600 / 300μm (30 / 50 mesh) to 120°C and put them into a sand mixer for stirring. After cooling to about 85°C, add 13.8 grams of environmental protection resin A, stir for 20 seconds, and add 0.1 g of lead organic acid (such as lead isooctanoate) and stir for 35 seconds; add 6.2 g of environmentally friendly resin B and stir for 60 seconds, add 2 g of calcium stearate and stir for 80 seconds, cool and sieve to obtain an environmentally friendly resin coating. membrane proppant.

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Abstract

The invention discloses an environment-friendly high-strength resin coated proppant which comprises aggregate, environment-friendly resin, catalyst, dispersant, drying agent and anti-caking agent. The environment-friendly resin comprises substance containing terminated hydroxyl and substance containing isocyanate group. On the basis that effects of conventional proppants are retained, environment and human body can be protected better, energy is further saved, and cost is saved. The environment-friendly high-strength resin coated proppant has the advantages of high strength and low breakage rate.

Description

technical field [0001] The invention belongs to the technical field of oil and gas field exploitation, and belongs to a composition for strengthening fracture, such as a proppant composition for keeping fracture open, in particular to an environment-friendly high-strength resin-coated proppant. Background technique [0002] Conventional and unconventional oil and gas extraction technologies have developed relatively maturely in North American countries, and China's mining technologies have made considerable progress. Membrane-coated proppants have been widely used in hydraulic fracturing construction. However, due to the large amount of fracturing fluid used in hydraulic fracturing construction, a large amount of fracturing fluid will flow back to the ground during construction, which will cause surface water pollution. . [0003] At present, the materials used in domestic film-covered proppants are basically phenolic and epoxy resins, and these resins will produce toxic an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/80
CPCC09K8/805
Inventor 熊鹰张坤王正力
Owner CHONGQING CHANGJIANG RIVER MOLDING MATERIAL GRP
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