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Amphiphobic fluorine-containing nanofluid as well as preparation method and application thereof

A nano-fluid, amphiphobic technology, applied in chemical instruments and methods, drilling compositions, etc., to achieve the effects of stable product properties, simple preparation methods, and easy control of reaction conditions

Pending Publication Date: 2022-03-08
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the reservoir wettability problem of complicated hydrophilic and oil-wet formations, the present invention provides a fluorine-containing nanofluid capable of significantly changing the wettability of the reservoir and a preparation method thereof

Method used

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  • Amphiphobic fluorine-containing nanofluid as well as preparation method and application thereof
  • Amphiphobic fluorine-containing nanofluid as well as preparation method and application thereof
  • Amphiphobic fluorine-containing nanofluid as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0047] A method for preparing an amphobic fluorine-containing nanofluid. In a 250mL three-neck flask with a reflux device and electromagnetic stirring, add 0.1g of hydrophilic nano-silicon dioxide and 50mL of absolute ethanol respectively, and adjust the pH with 1mol / L hydrochloric acid To 4, add 0.01mol vinyltrimethoxysilane (1.5g) after ultrasonication for 10min at room temperature, and react at 80°C for 1h to obtain a nano core material; then add 0.01mol 1,1,1,3,3,3 - Add hexafluoroisopropyl acrylate (2.2g), 0.1g sodium lauryl sulfate and 0.1g azobisisobutyronitrile into 50mL N,N-dimethylformamide, and add the prepared The nano-core material was ultrasonically emulsified for 30 minutes, and then heated to 80° C. for 4 hours. After complete reaction, the obtained light yellow emulsion product is amphiphobic fluorine-containing nanofluid with core-shell structure. Yield about 98%.

Embodiment 2

[0049] The preparation method is as described in Example 1, except that the silane coupling agent is vinyltriethoxysilane.

Embodiment 3

[0051] The preparation method is as described in Example 1, except that the silane coupling agent is allyltriethoxysilane, and the emulsifier is 0.1 g sodium perfluorononenyloxybenzenesulfonate.

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Abstract

The invention relates to an amphiphobic fluorine-containing nanofluid as well as a preparation method and application thereof. The amphiphobic fluorine-containing nanofluid is composed of a nano core material and a polymer shell layer material, the surface of the nano core material is grafted with a coupling agent with double bonds, the polymer shell material is a fluorine-containing polymer, and the invention further provides a preparation method and application of the amphiphobic fluorine-containing nano fluid. The amphiphobic fluorine-containing nanofluid disclosed by the invention has extremely strong wetting reversal capability, can be used for transforming oil reservoirs, can convert the wettability of hydrophilic and oleophylic reservoirs into remarkable amphiphobic property, and effectively solves the liquid lock effect and Jamin effect caused by the wettability of the reservoirs.

Description

technical field [0001] The invention relates to an amphobic fluorine-containing nanofluid and its preparation method and application, belonging to the technical fields of oil field chemistry and colloid and interface chemistry. Background technique [0002] During oil and gas production such as drilling, well completion, well workover, etc., the stagnation of liquid in porous media will cause many problems. In porous media, when another immiscible phase infiltrates into the reservoir or the saturation of the original immiscible phase increases, the relative permeability of the reservoir will be damaged, and the permeability of the reservoir and the relative permeability of oil and gas will decrease. This phenomenon called the liquid lock effect. When liquid droplets or bubbles in liquid-liquid or gas-liquid two-phase seepage flow through pore throats or narrow channels, additional resistance effects will occur, which is called the Jamin effect. These effects will increase ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/58C09K8/588C09K8/88C08F292/00C08F220/24
CPCC09K8/58C09K8/588C09K8/882C08F292/00C09K2208/10C08F220/24
Inventor 王彦玲梁雷刘斌史文静梁诗楠张传保李迪陈孟鑫
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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