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An air-suspended proppant for slick water fracturing and its preparation method and use method

A technology of air suspension and water fracturing, which is applied in the direction of chemical instruments and methods, earthwork drilling, and drilling compositions, etc., which can solve problems such as formation damage and reduce reservoir conductivity, so as to reduce damage and reduce Effects of desanding and reducing the displacement of pump trucks

Active Publication Date: 2019-10-11
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the surface coating of this proppant can cause damage to the formation in the formation and reduce the conductivity of the reservoir

Method used

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  • An air-suspended proppant for slick water fracturing and its preparation method and use method
  • An air-suspended proppant for slick water fracturing and its preparation method and use method
  • An air-suspended proppant for slick water fracturing and its preparation method and use method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] (1) Hydrophobic and air-friendly emulsion preparation:

[0041] Raw material: 40.0 g of dodecafluoroheptyl methacrylate (40 wt % of fluorine-containing polymerized monomer);

[0042] Lauryl methacrylate 5.0g, hydroxypropyl acrylate 5.0g, methacrylate-2-(dimethylamino)ethyl 5.0g (high

[0043] Molecular binder 15wt%)

[0044] Vinyltriethoxysilane 7.0g (silane coupling agent 7wt%)

[0045] Polyoxyethylene 2-octylphenol ether-10 3.0g (surfactant 3wt%)

[0046] Deionized water 35.0g (35wt%)

[0047] 1) Mixing the fluorine-containing polymerized monomer, the polymer binder, and the silane coupling agent uniformly in proportion to obtain a raw material mixture;

[0048] 2) Add surfactant and deionized water in proportion to the reactor, stirring at a speed of 600r / min;

[0049] 3) Heating to 75°C under the protection of nitrogen, and then adding the raw material mixture dropwise into the reaction kettle;

[0050] 4) After the dropwise addition, continue the heat preservat...

Embodiment 2

[0058] (1) Hydrophobic and air-friendly emulsion preparation:

[0059] Raw material: 40.0 g of dodecafluoroheptyl acrylate (40 wt% of fluorine-containing polymerized monomer);

[0060] 5.0 g of octadecyl methacrylate, 5.0 g of hydroxypropyl acrylate, 5.0 g of 2-(dimethylamino) ethyl methacrylate (polymer binder 15 wt%)

[0061] Vinyltrimethoxysilane 7.0g (silane coupling agent 7wt%)

[0062] Sodium dodecylbenzenesulfonate 3.0g (surfactant 3wt%)

[0063] Deionized water 35.0g (35wt%)

[0064] 1) Mixing the fluorine-containing polymerized monomer, the polymer binder, and the silane coupling agent uniformly in proportion to obtain a raw material mixture;

[0065] 2) Add surfactant and deionized water in proportion to the reactor, stirring at a speed of 600r / min;

[0066] 3) Heating to 75°C under the protection of nitrogen, and then adding the raw material mixture dropwise into the reaction kettle;

[0067] 4) After the dropwise addition, continue the heat preservation reacti...

Embodiment 3

[0075] (1) Hydrophobic and air-friendly emulsion preparation:

[0076] Raw material: 40.0 g of trifluorooctyl methacrylate (40 wt % of fluorine-containing polymerized monomer);

[0077] 5.0 g of lauryl methacrylate, 5.0 g of hydroxyethyl acrylate, 5.0 g of 2-(dimethylamino) ethyl methacrylate (polymer binder 15 wt %)

[0078] γ-aminopropyltrimethoxysilane 7.0g (silane coupling agent 7wt%)

[0079] Polyoxyethylene sorbitan monostearate 3.0g (surfactant 3wt%)

[0080] Deionized water 35.0g (35wt%)

[0081] 1) Mixing the fluorine-containing polymerized monomer, the polymer binder, and the silane coupling agent uniformly in proportion to obtain a raw material mixture;

[0082] 2) Add surfactant and deionized water in proportion to the reactor, stirring at a speed of 600r / min;

[0083] 3) Heating to 75°C under the protection of nitrogen, and then adding the raw material mixture dropwise into the reaction kettle;

[0084] 4) After the dropwise addition, continue the heat preser...

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Abstract

The present invention provides an air-suspension proppant for slick water fracturing and its preparation method and application method. The air-suspension proppant includes aggregate particles, and a hydrophobic and aerophilic coating is cured on the outside of the aggregate particles , the hydrophobic and aerophilic coating is made by the curing reaction of a hydrophobic and aerophilic emulsion; The reaction is made. The air-suspended proppant of the present invention is injected with 10-20% nitrogen during slick water fracturing, and the hydrophobic and aerophilic coating can absorb tiny bubbles formed by nitrogen in slick water, so that the proppant is still in a suspended state under low-viscosity conditions , to achieve the purpose of sand-carrying cross-linking fluid, so there is no need to use a large amount of organic materials to increase the viscosity of fracturing fluid, no damage to the formation, and it is beneficial to flowback, which is of great significance to the production increase of unconventional oil and gas reservoirs.

Description

technical field [0001] The invention belongs to the technical field of unconventional oil and gas development, and in particular relates to an air-suspension proppant for slick water fracturing and its preparation method and usage method, which are mainly used in slick water fracturing technology in unconventional oil and gas development. Background technique [0002] Unconventional oil and gas development is currently a hot research field at home and abroad, and volume fracturing stimulation has become one of the ideal ways for unconventional oil and gas development. According to the characteristics of unconventional oil and gas reservoirs, the slick water fracturing fluid technology commonly used in North America is mainly introduced in China to achieve the purpose of reducing costs and increasing efficiency. Compared with cross-linking fluid, slick water has the advantages of low cost, more likely to form a complex fracture network, less damage to the reservoir, and easie...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F283/06C08F220/22C08F220/18C08F220/28C08F220/34C08F230/08C09K8/80E21B43/267
CPCE21B43/267C09K8/805C08F220/22C08F283/06C08F220/1812C08F220/281C08F220/34C08F230/08C08F220/1818
Inventor 王历历李宪文丁里李宁军李小玲刘晓瑞祖凯孟磊
Owner PETROCHINA CO LTD
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