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A fracturing fluid and its preparation method and application

A fracturing fluid and surfactant technology, which is applied in the preparation of sugar derivatives, chemical instruments and methods, earth drilling and mining, etc., can solve the problems of inability to prevent and reduce dust, damage to underground reservoirs, poor effect, etc., and achieve Effects of reducing coal dust production, ensuring health, and reducing production

Active Publication Date: 2022-07-26
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, a potential problem with water-based fracturing fluids is that they can seriously damage underground reservoirs
Oil-based fracturing fluids are usually composed of hydrocarbons (crude oil, diesel oil) and gel breakers (strong bases and weak salts). However, due to the influence of crude oil and other substances, such fracturing fluids generally have high cost and poor shear resistance. , Large filtration loss, etc.
Moreover, the effects of these two types of fracturing fluids on the coal body are poor, and have little impact on the dust production during coal mining, and cannot fundamentally play the role of dust prevention and dust reduction

Method used

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  • A fracturing fluid and its preparation method and application
  • A fracturing fluid and its preparation method and application
  • A fracturing fluid and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Step 1, prepare intermediate product: add lauryl glucoside and mesityl tribenzoic acid to the water in the three-necked flask with thermometer and stirring device in a molar ratio of 1:1, wherein the molar ratio of water and lauryl glucoside is 500:1, mix evenly, add 0.5mol ferrous sulfate as a catalyst, ultrasonically treat it for 1h to mix it well, and then put it in N 2 The reaction was carried out at 95°C for 3h under protection, and then transferred to petroleum ether, washed, filtered and dried to obtain a pale yellow powder-intermediate product (formula III);

[0052] The reaction process is as follows:

[0053]

[0054] Step 2, prepare surfactant: add the intermediate product: oleic acid amidopropyl dimethylamine: hydrochloric acid=1:1:1 to the ethyl acetate aqueous solution with a molar ratio of 1:1, wherein the intermediate product The molar ratio to ethyl acetate = 1:10, mix evenly, seal, react at 85 ° C for 18 h, then add an appropriate amount of potassi...

Embodiment 2

[0059] Step 1, prepare an intermediate product: add lauryl glucoside, mes-tribenzoic acid and p-benzoic acid in a molar ratio of 2:1:1 to the water in a three-necked flask with a thermometer and a stirring device, wherein the water and lauryl The molar ratio of glucoside is 500:1, mix evenly, add 0.5mol ferrous sulfate as a catalyst, ultrasonically treat it for 1h to mix it well, and then put it in N 2 Under protection, react at 95 ° C for 3 h, then transfer to petroleum ether, wash, filter, and dry to obtain light yellow powder-intermediate product (mixture of formula III and formula IV);

[0060] The reaction process is as follows:

[0061]

[0062] Step 2, prepare surfactant: add the intermediate product: oleic acid amidopropyl dimethylamine: hydrochloric acid=1:1:1 to the ethyl acetate aqueous solution with a molar ratio of 1:1, wherein the intermediate product The molar ratio to ethyl acetate = 1:10, mix evenly, seal, react at 85 ° C for 18 h, then add an appropriate ...

Embodiment 3

[0067] Step 1, prepare intermediate product: add lauryl glucoside and p-benzoic acid to the water in the three-necked flask with thermometer and stirring device in a molar ratio of 1:1, wherein the molar ratio of water and lauryl glucoside is 500. : 1, mix evenly, add 0.5mol ferrous sulfate as a catalyst, ultrasonically treat it for 1h to mix it well, and then put it in N 2 The reaction was carried out at 95° C. for 3 h under protection, and then transferred to petroleum ether, washed, filtered and dried to obtain a pale yellow powder-intermediate product (formula IV);

[0068] The reaction process is as follows:

[0069]

[0070] Step 2, prepare surfactant: add the intermediate product: oleic acid amidopropyl dimethylamine: hydrochloric acid=1:1:1 to the ethyl acetate aqueous solution with a molar ratio of 1:1, wherein the intermediate product The molar ratio to ethyl acetate = 1:10, mix evenly, seal, react at 85 ° C for 18 h, then add an appropriate amount of potassium h...

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Abstract

The invention discloses a fracturing fluid, a preparation method and application thereof, and belongs to the technical field of coal seam water injection. The fracturing fluid in the present invention includes surfactant, nanomaterial, and clay stabilizer; it is obtained by uniformly mixing the surfactant, nanomaterial, clay stabilizer and water at 50°C. The fracturing fluid of the invention can well penetrate into the coal body, interact with the coal body, increase the wettability of the coal body, and rely on the surfactant in the fracturing fluid to act as a "bridge" between the coal molecules and the water molecules On the one hand, the hydrophobic group is combined with the coal molecules, and on the other hand, the water molecules are pulled, which effectively reduces the surface tension of the water, thereby increasing the amount of water immersed in the coal body when the coal seam is flooded, thereby reducing the subsequent mining. The output of coal dust in the coal process ensures the safe production of coal mines and the health of operators.

Description

technical field [0001] The invention relates to the technical field of coal seam water injection, in particular to a fracturing fluid and a preparation method and application thereof. Background technique [0002] The coal industry has always been an important energy structure support in China, playing a very important role in the rise of new China and economic and social development. still occupy a dominant position in the energy structure. The dust hazard in coal mines has always been a technical problem that needs to be solved in the development process of the coal mining industry. The comprehensive mechanized mining face (referred to as the fully mechanized mining face), as the place with the largest dust production in coal mines, accounts for about 60% of the dust production in coal mines, and is the focus of dust prevention and dust reduction. In some coal mines, the dust concentration of the fully mechanized working face can reach 5000-6000 mg / m without taking any m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K23/56C09K23/22C07H15/04C07H1/00C09K8/68C09K8/86E21B43/26
CPCC07H15/04C07H1/00C09K8/68C09K8/86E21B43/26C09K2208/30
Inventor 周刚李帅龙王存民姜文静苗雅楠刘冬徐翠翠孟群智邢梦瑶王凯丽王琪徐乙鑫
Owner SHANDONG UNIV OF SCI & TECH
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