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Fracturing propping agent and its preparation method

A fracturing proppant and modifier technology, applied in chemical instruments and methods, adhesives, earth-moving drilling, etc., can solve problems such as agglomeration of fracturing proppant, achieve high crushing strength, and prevent closure.

Inactive Publication Date: 2014-06-11
ELION RESOURCE GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that the fracturing fluid carrying the fracturing proppant obtained by coating the aggregate particles with a hydrophobic resin needs to be sent into the ground at a higher pumping pressure, the inventors of the present invention conducted in-depth research , found that: compared with the fracturing fluid using ceramsite or quartz sand as fracturing proppant, the fracturing fluid using hydrophobic resin-coated aggregate particles as fracturing proppant, the fracturing proppant agglomeration phenomenon is obvious , and the fracturing fluid also contains a lot of air bubbles

Method used

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  • Fracturing propping agent and its preparation method
  • Fracturing propping agent and its preparation method
  • Fracturing propping agent and its preparation method

Examples

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preparation example Construction

[0013] The preparation method of fracturing proppant provided by the present invention includes curing a mixture containing aggregate particles and a film-coated binder, wherein the film-coated binder is a hydrophilic resin composition, and the hydrophilic The preparation method of the resin composition includes:

[0014] The epoxy resin is first contacted with at least one modifier, the modifier is selected from acid anhydrides, and the conditions of the first contact are such that the hydroxyl group in the epoxy resin and the acid anhydride in the modifier Group reaction; and

[0015] Under conditions sufficient for the acid to form a salt, the mixture obtained by the first contact is subjected to a second contact with at least one alkaline substance.

[0016] According to the present invention, the modifier is selected from acid anhydrides. When the modifier is contacted and reacted with the epoxy resin, the acid anhydride group reacts with the hydroxyl group contained in the mo...

Embodiment 1

[0059] (1) 100g epoxy resin (commercially purchased from Langfang Nuoerxin Chemical Co., Ltd., grade E-21, epoxy value 0.21mol / 100g, hydroxyl value 0.226mol / 100g) was dissolved in 50g toluene, and 0.003 was added. g Hydroquinone, adjust the pH of the reaction solution to 2. With stirring, the temperature was increased to 100°C, then 9.8g of maleic anhydride was added, and the reaction was stirred at this temperature for 2 hours; then the temperature was lowered to 40°C, 10.1g of triethylamine was added, and the reaction was continued for 0.5 hours to obtain The solvent is evaporated using a rotary evaporator to obtain the hydrophilic resin composition of the present invention.

[0060] (2) 100g of the hydrophilic resin composition obtained in step (1) and 2000g of raw sand (commercially available from Qingtongxia Jinshengyuan Propant Co., Ltd., particle size 30-50 mesh) were mixed and stirred for 2 minutes, and then added 25g of tetrahydrophthalic anhydride and 3g of diethylenet...

Embodiment 2

[0066] (1) Dissolve 100g epoxy resin (commercially available from Langfang Nuoerxin Chemical Co., Ltd., grade E-51, epoxy value 0.51mol / 100g, hydroxyl value 0.046mol / 100g) in 50g toluene, add 0.001 g Hydroquinone, adjust the pH of the reaction solution to 4. Increase the temperature to 100°C with stirring, then add 3.0g of maleic anhydride, stir and react at this temperature for 3 hours; then lower the temperature to 50°C, add 4.3g of tri-n-propylamine, and continue the reaction for 0.5 hours. The solvent is evaporated from the obtained mixture with a rotary evaporator to obtain the hydrophilic resin composition of the present invention.

[0067] (2) 100g of the hydrophilic resin composition obtained in step (1) and 2000g of raw sand (commercially available from Qingtongxia Jinshengyuan Propant Co., Ltd., particle size 30-50 mesh) were mixed and stirred for 2 minutes, and then added 30 Diaminodiphenylmethane, stirred at 180°C for 3 minutes, and then lowered the temperature to ro...

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Abstract

The invention provides a fracturing propping agent preparation method, and a fracturing propping agent prepared through the method. The fracturing propping agent preparation method is characterized in that the fracturing propping agent is obtained by curing a mixture containing aggregate particle particles and a laminating adhesive; and the laminating adhesive is a hydrophilic resin composition, and a preparation method of the hydrophilic resin composition comprises the following steps: allowing an epoxy resin to have first contact with a modifier selected from acid anhydride to make the hydroxy group in the epoxy resin react with the acid anhydride group in the modifier; and allowing a mixture obtained through the first contact to have second contact with an alkaline substance under acid-to-salt conditions. The fracturing propping agent can be well dispersed in a water-based fracturing fluid, the content of bubbles in the water-based fracturing fluid carrying the fracturing propping agent is low, and the fracturing propping agent also has a high crushing limit.

Description

Technical field [0001] The invention relates to a method for preparing a fracturing proppant and a fracturing proppant prepared by the method. Background technique [0002] In the process of oil and gas exploitation, the high closure pressure and low permeability ore deposits are fractured after fracturing treatment, and the oil and gas are collected from the channels formed by the fractures, and the fracturing proppant enters the formation filling along with the fracturing fluid. In the rock fissures, it plays a role in supporting the fissures not to be closed due to stress release, thereby maintaining high conductivity, allowing oil and gas to flow, and increasing the output of oil and gas. [0003] At present, the most commonly used fracturing proppants in oil fields are mainly ceramsite and quartz sand. However, the crushing rate of ceramsite and quartz sand is high, the crushed ceramsite in the reservoir is easy to migrate, and the conductivity is poor. Proppants obtained by...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/80C09J163/00C08G59/16C08G59/14
CPCC09K8/805C08G59/1438C08G59/1477C09J163/00
Inventor 高双之陈步宁顾卫荣周玉生王建伟仲晓东刘珊
Owner ELION RESOURCE GROUP
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