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Nano-composite initiator, thickening agent for fracturing fluid and application

A nano-composite and initiator technology, applied in the fields of organic chemistry, drilling compositions, chemical instruments and methods, etc., can solve the problem of high temperature shearing at 130 ° C, the influence of broken gel formation, and insoluble dissolution. Sufficient and other problems, to achieve the effect of good sand suspension performance, improved high temperature resistance, and improved overall performance

Pending Publication Date: 2022-03-01
中石化石油工程技术服务有限公司 +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the current general polymers have poor temperature resistance without the addition of metal crosslinking agents, and few can withstand high temperature shearing at 130 °C, and due to certain hydrophobic association polymers or ultra-high linearity Formation plugging caused by insufficient polymer dissolution and incomplete gel breaking directly affects fracturing and subsequent stimulation effects

Method used

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  • Nano-composite initiator, thickening agent for fracturing fluid and application
  • Nano-composite initiator, thickening agent for fracturing fluid and application
  • Nano-composite initiator, thickening agent for fracturing fluid and application

Examples

Experimental program
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Effect test

preparation example 1

[0094] Preparation of nanocomposite initiator NSI-1:

[0095] In a 500ml three-necked flask, add 65ml of xylene, then add 12.5g of 3,5-dimethyl-p-hydroxybenzophenone, and 1.25g of tetrabutylammonium bromide, heat it to 45°C, and slowly drop it under stirring Add 24.6 g of epichlorohydrin. Maintain the reaction temperature of 50°C for 6 hours, distill off the solvent under reduced pressure to obtain the intermediate BPCL-1;

[0096] In a 500ml three-necked flask, add 150ml of petroleum ether and 50ml of acetone, then add 4g of nano-silica (the average particle size of nano-silica is 5-20nm), stir and disperse for 30min, and then add 23g of 3-aminopropyl tris Ethoxysilane, react at 50°C for 10h to obtain the intermediate SINH-1;

[0097] In a 500ml three-necked flask, add 60ml of isobutanol, then add 12g of BPCL-1, 13.5g of intermediate SINH-1 and 1.5g of triethanolamine, heat to 60°C, and react for 10h. After the reaction, distill off the solvent to obtain nano Composite ini...

preparation example 2

[0099] Preparation of nanocomposite initiator NSI-2:

[0100] In a 500ml three-necked flask, add 65ml of xylene, then add 14g of 3,5-diethyl-p-hydroxybenzophenone, and 1.3g of tetrabutylammonium bromide, heat to 40°C, and slowly add dropwise under stirring 23.2 g of epichlorohydrin. Maintain the reaction temperature of 50°C for 7 hours, distill off the solvent under reduced pressure to obtain the intermediate BPCL-2;

[0101] In a 500ml three-neck flask, add 60ml of butanol, then add 11g of BPCL-2, 13g of intermediate SINH-1 and 1.5g of triethanolamine, heat to 60°C, and react for 10h. Agent NSI-2 (structure is shown in formula I, wherein R 1 is ethyl, R 2 is ethyl, R 3 for hydrogen).

preparation example 3

[0103] Preparation of nanocomposite initiator NSI-3:

[0104] In a 500ml three-necked flask, add 65ml of xylene, then add 12g of p-hydroxybenzophenone, and 1.2g of tetrabutylammonium bromide, after heating to 40°C, slowly add 23.6g of epichlorohydrin dropwise under stirring, Maintain the reaction temperature of 50°C for 7 hours, distill off the solvent under reduced pressure to obtain the intermediate BPCL-3;

[0105] In a 500ml three-neck flask, add 20ml of acetone and 50ml of butanol, then add 10g of BPCL-3, 12.6g of intermediate SINH-1 and 1.6g of triethylamine, heat to 55°C, react for 10h, and distill off the solvent after the reaction , to obtain nanocomposite initiator NSI-3 (structure shown in formula I, wherein R 1 is ethyl, R 2 for hydrogen, R 3 for hydrogen).

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Abstract

The invention discloses a nano-composite initiator which comprises at least one of composite compounds as shown in a formula I in the specification. The invention further discloses a thickening agent for the fracturing fluid, and application of the thickening agent in preparation of the fracturing fluid, wherein the raw materials of the thickening agent comprise the nano-composite initiator. The thickening agent for the fracturing fluid provided by the invention has the characteristics of rapid dissolution, high temperature resistance and good sand-carrying property, can form a high-temperature fracturing fluid system which is efficient in performance and convenient to use on site, and can meet the application requirements of a large-scale hydraulic fracturing construction process.

Description

technical field [0001] The invention belongs to the technical field of petroleum exploitation, and in particular relates to a nanocomposite initiator, a thickener for fracturing fluid and their application. Background technique [0002] With the deepening of oil and gas extraction, the development of unconventional oil and gas reservoirs is becoming more and more in-depth and large-scale, especially the development of tight oil reservoirs, shale gas and shale oil is imminent. Hydraulic fracturing technology is a relatively mature and effective technical means for unconventional oil and gas stimulation. [0003] At present, the main fracturing fluids used are guar gum and its derivative plant gum fracturing fluid, viscoelastic surfactant fracturing fluid and synthetic polymer fracturing fluid, among which plant gum fracturing fluid is the main one, accounting for about 100% of the total fracturing fluid. 90% of the cracking fluid market. Guar gum and its derivatives have st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F2/48C08F220/56C08F220/06C08F220/58C09K8/68C07F7/18
CPCC08F2/48C08F220/56C09K8/68C07F7/1804C07F7/1892C08F220/06C08F220/585
Inventor 安涛张学政翟恒立赵俊范玉斌袁浩文张霄雷
Owner 中石化石油工程技术服务有限公司
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