Modified silica material suitable for fluorocarbon active agent superamphiphobic debris-carrying agent for water-based drilling fluid, preparation method and application thereof

A silica and modified technology, applied in the field of oil and gas drilling, can solve the problems of complex polymer synthesis process, poor temperature resistance, high product cost, improve drilling speed and wellbore purification efficiency, improve chip carrying effect, The effect of reducing relative density

Active Publication Date: 2020-04-24
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, most of the water-based drilling fluid debris-carrying agents developed at home and abroad are modified with vegetable gum molecules to synthesize polymers with special functions. However, these materials have poor temperature resistance and unstable rheological properties at high temperatures. The process is complicated, the product cost is high, and it is difficult to apply on a large scale

Method used

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  • Modified silica material suitable for fluorocarbon active agent superamphiphobic debris-carrying agent for water-based drilling fluid, preparation method and application thereof
  • Modified silica material suitable for fluorocarbon active agent superamphiphobic debris-carrying agent for water-based drilling fluid, preparation method and application thereof
  • Modified silica material suitable for fluorocarbon active agent superamphiphobic debris-carrying agent for water-based drilling fluid, preparation method and application thereof

Examples

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preparation example Construction

[0024] One aspect of the present invention provides a method for preparing a modified silica material, the method comprising:

[0025] 1) in a mixed solvent containing alcohol and water, the silica particles and the silane coupling agent represented by the formula (1) are subjected to a first contact reaction;

[0026] 2) carrying out the second contact reaction with the product of the first contact reaction with the compound shown in the formula (2) and the compound shown in the formula (3);

[0027] 3) carrying out the third contact reaction with the product of the second contact reaction with the compound shown in formula (4);

[0028]

[0029] Formula (4) I-R;

[0030] R 1 , R 2 , R 7 and R 8 each independently selected from H and C1-C6 alkyl; R 3 -R 5 each independently selected from C1-C6 alkyl and C1-C6 alkoxy; L 1 for -O-L 2 - or C1-C8 alkylene, and L 2 For C1-C8 alkylene; R 6 Perfluoroalkyl selected from C4-C20; R 9 is selected from H or C1-C6 alkyl; R ...

Embodiment 1

[0112] This example is used to illustrate the modified silica material of the present invention and its preparation method.

[0113] In 100mL ethanol-water mixed solution (ethanol / water volume ratio is 1:2), add the silicon dioxide of 1g and ultrasonically disperse 30min; Then add KH570 (wherein, the molar dosage ratio of silicon dioxide in silicon and KH570 is 1 : 0.2) Mix evenly, and raise the temperature to 45°C to react for 60min; then add acrylamide and perfluorooctanesulfonyl fluoride (wherein, the silicon dioxide, acrylamide and perfluorooctanesulfonyl fluoride calculated as silicon The molar ratio of methyl iodide is 1:5:1.5) and continue to react at 45 ° C for 3 hours, and then add methyl iodide after cooling to room temperature (about 25 ° C). ) and reacted for 60min, and the resulting product was the modified silica material FCA-1.

Embodiment 2

[0115] This example is used to illustrate the modified silica material of the present invention and its preparation method.

[0116] Add 1 g of silicon dioxide to 100 mL of ethanol-water mixed solution (methanol / water volume ratio of 1:5) and ultrasonically disperse it for 30 min; then add γ-methacryloyloxypropyl triethoxysilane (wherein, with The molar ratio of silicon dioxide and γ-methacryloyloxypropyltriethoxysilane in terms of silicon is 1:0.3), mix well, and raise the temperature to 60 °C for 90 minutes; then add acrylamide and Perfluorohexylsulfonyl fluoride (wherein, the molar ratio of silicon dioxide, acrylamide and perfluorohexylsulfonyl fluoride in terms of silicon is 1:2:4) and continue to react at 60 ° C for 4 h, and then reduce to room temperature ( About 25°C), add iodoethane (wherein, the molar ratio of iodoethane to acrylamide is 1.5:4) and react for 45min, the obtained product is modified silica material FCA-2.

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Abstract

The invention relates to the field of oil and gas drilling, in particular to a modified silica material suitable for use as a fluorocarbon active agent super-amphiphobic chip-carrying agent for water-based drilling fluid, a preparation method and the application thereof. The preparation method of the modified silica material comprises the following steps: performing a first contact reaction on silica with a silane coupling agent represented by formula (1) in a mixed solvent containing an alcohol and water; performing a second contact reaction on the product of the first contact reaction with acompound represented by formula (2) and a compound represented by formula (3); and performing a third contact reaction on the product of the second contact reaction with a compound represented by formula (4). The modified silica material can be used as a chip-carrying agent in the water-based drilling fluid and achieves an excellent chip-carrying effect.

Description

technical field [0001] The invention relates to the field of oil and gas drilling, in particular to a modified silica material suitable for a fluorocarbon active agent-type super-amphiphobic chip-carrying agent for water-based drilling fluids, and a preparation method and application thereof. Background technique [0002] As the exploitation of conventional oil fields in my country has basically entered the middle and late stages, the reservoir conditions for exploration and development are becoming more and more severe. The special well type puts forward higher requirements on the performance of the drilling fluid. In view of the difficulty of carrying cuttings in the process of drilling difficult wells, it is easy to form a cuttings bed in the well, which further causes the increase of friction resistance and torque. What's more, the drill sticks, causing huge drilling accidents, affecting drilling efficiency, and causing huge cost consumption. Therefore, conventional wat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/035C09K8/24C08F292/00C08F220/56
CPCC08F292/00C09K8/035C09K8/24C08F220/56
Inventor 蒋官澄倪晓骁高德利伍贤柱马光长孙金声蒲晓林杨丽丽
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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