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Heat-resistant high-strength precoated sand fracturing propping agent and preparation method thereof

A fracturing proppant and coated sand technology, which is used in earth-moving drilling, fluid production, wellbore/well components, etc., can solve the problem of insufficient contact between resin and sand, poor coating effect, large energy consumption, etc. problem, to achieve good effect of lamination process, improve heat resistance and compressive strength, and good flow conductivity

Active Publication Date: 2013-07-10
PETROCHINA CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process needs to melt the resin before it can be coated, and the heating and stirring process will cause a large amount of energy consumption, and it is difficult to fully contact the high-viscosity resin with the sand, resulting in poor coating effect

Method used

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  • Heat-resistant high-strength precoated sand fracturing propping agent and preparation method thereof
  • Heat-resistant high-strength precoated sand fracturing propping agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Weigh 10g of γ-aminopropyltriethoxysilane, 50g of quartz sand, 100g of ethanol, 100g of distilled water, and 1g of concentrated hydrochloric acid into the reaction bottle, stir and react for 1h at 80°C, filter and dry to obtain surface hydrophobic quartz sand.

[0023] Weigh 10g of the above-mentioned modified quartz sand, 0.8g of formaldehyde, 1.2g of phenol, 40g of ethanol, and 0.2g of sodium hydroxide into the container, stir and react for 24 hours at 90°C, filter and dry to obtain resin-coated quartz sand .

[0024] Weigh 9g of the above resin-coated quartz sand, 1g of hexamethylenetetramine, and 1g of calcium stearate into the container, stir and disperse at 80°C for 1h, cure at 120°C for 2h, and cure at 180°C for 1h to obtain a heat-resistant high-strength coating. Membrane sand proppant.

Embodiment 2

[0026] Weigh 20g of 3-glycidyloxypropyltrimethoxysilane, 50g of quartz sand, 100g of ethanol, 100g of distilled water, and 1g of concentrated hydrochloric acid into the reaction bottle, stir and react for 1h at 80°C, filter and dry to obtain the surface Hydrophobic quartz sand.

[0027] Weigh 20g of the above-mentioned modified quartz sand, 2.8g of glyoxal, 5.2g of p-cresol, 80g of ethanol, and 0.4g of sodium hydroxide into the container, stir and react for 24 hours at 90°C, filter and dry to obtain the resin Coated quartz sand.

[0028] Weigh 18g of the above resin-coated quartz sand, 2g of melamine, and 2g of zinc stearate into the container, stir and disperse at 80°C for 1h, cure at 120°C for 2h, and cure at 180°C for 1h to obtain a heat-resistant high-strength coated sand proppant.

Embodiment 3

[0030] Weigh 15g of γ-methacryloxypropyltrimethoxysilane, 50g of quartz sand, 100g of ethanol, 100g of distilled water, and 1g of concentrated hydrochloric acid into the reaction bottle, stir and react for 1h at 80°C, and then dry it to obtain Surface hydrophobic quartz sand.

[0031] Weigh 15g of the above-mentioned modified quartz sand, 1.8g of succinic dialdehyde, 2.7g of p-chlorophenol, 60g of ethanol, and 0.3g of sodium hydroxide into the container, stir and react for 24 hours at 90°C, filter and dry to obtain the resin package covered quartz sand.

[0032] Weigh 13.5g of the above resin-coated quartz sand, 1.5g of hexamethylenetetramine, and 1.5g of magnesium stearate into the container, stir and disperse at 80°C for 1h, cure at 120°C for 2h, and cure at 180°C for 1h to obtain Thermal high-strength coated sand proppant.

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Abstract

The invention relates to a heat-resistant high-strength precoated sand fracturing propping agent and a preparation method thereof. The heat-resistant high-strength precoated sand fracturing propping agent comprises the following components by mass ratio: resin-coating quartz sand, a curing agent and a dispersing agent in a mass ratio of 9:1:1. The preparation method comprises the following steps: (1) carrying out hydrophobic treatment on the quartz sand surface utilizing a silane coupling agent; (2) preparing the resin-coating quartz sand through an in situ polymerization method; and (3) adding the resin-coating quartz sand, the curing agent and the dispersing agent into a container according to the mass ratio of 9:1:1, stirring at 80 DEG C to disperse for 1h, curing at 120 DEG C for 2h and curing at 180 DEG C for 1h so as to obtain the heat-resistant high-strength precoated sand fracturing propping agent. By utilizing the preparation method, a fusing coating technology with high energy consumption and poor precoating effect is avoided, and the obtained precoated sand fracturing propping agent has good heat resistance and high compressive strength.

Description

Technical field: [0001] The invention relates to an oil and gas well proppant in the technical field of oil field exploitation, in particular to a heat-resistant, high-strength coated sand proppant and a preparation method thereof. Background technique: [0002] Fracturing oil recovery is an important new technology for low-permeability oil and gas extraction of oil and natural gas. Proppant is the key material of fracturing oil recovery process. Its main principle is to use proppant to create fractures in the reservoir to increase the porosity of the rock formation and form artificial channels to achieve the purpose of increasing productivity. At present, the commonly used oil well fracturing proppant in China is quartz sand and ceramsite. Quartz sand is cheap, but its compressive strength is low, its breakage rate is high under high pressure, and its downhole conductivity decreases quickly, making it difficult to use for a long time. Ceramsite is an ideal proppant for f...

Claims

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Application Information

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IPC IPC(8): C09K8/80
Inventor 余龙刘佩森马吉宝
Owner PETROCHINA CO LTD
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