Modified silica material suitable for use as fluorocarbon active agent super-amphiphobic chip-carrying agent for water-based drilling fluid, preparation method and application thereof

A water-based drilling fluid and silica technology, applied in the field of oil and gas drilling, can solve the problems of complex polymer synthesis process, unstable high temperature rheological properties, poor temperature resistance, etc., to improve drilling speed and wellbore purification efficiency. , promote exploration and development, and improve the effect of carrying debris

Active Publication Date: 2019-02-15
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 use as fluorocarbon active agent super-amphiphobic chip-carrying agent for water-based drilling fluid, preparation method and application thereof
  • Modified silica material suitable for use as fluorocarbon active agent super-amphiphobic chip-carrying agent for water-based drilling fluid, preparation method and application thereof
  • Modified silica material suitable for use as fluorocarbon active agent super-amphiphobic chip-carrying agent for water-based drilling fluid, preparation method and application thereof

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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 formula (1) are subjected to a first contact reaction;

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

[0027] 3) performing a third contact reaction with the product of the second contact reaction and the compound represented by 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 is C1-C8 alkylene; R 6 Perfluoroalkyl selected from C4-C20; R 9 selected from H or C1-C6 alkyl; R is C1-C6 alkyl; X is halogen.

[0031] Acc...

Embodiment 1

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

[0113] Add 1 g of silicon dioxide to 100 mL of ethanol-water mixed solution (volume ratio of ethanol / water is 1:2) and ultrasonically disperse for 30 minutes; : 0.2) mix well, and raise the temperature to 45 ℃ for 60 minutes; then add acrylamide and perfluorooctane sulfonyl fluoride (wherein silicon dioxide, acrylamide and perfluorooctane sulfonyl fluoride are The molar ratio of methyl iodide is 1:5:1.5) and continue to react at 45°C for 3h, and then add methyl iodide after cooling down to room temperature (about 25°C) (the molar ratio of the amount of methyl iodide to acrylamide is 0.2:1 ) and reacted for 60 minutes, the resulting product is 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 is 1:5) and ultrasonically disperse for 30 min; then add γ-methacryloxypropyl triethoxysilane (wherein, with Silicon dioxide and γ-methacryloxypropyltriethoxysilane molar ratio is 1:0.3) mix evenly, and raise the temperature to 60 ℃ for 90min; 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 4h, then drop to room temperature ( (about 25°C) and then add iodoethane (the molar ratio of iodoethane to acrylamide is 1.5:4) and react for 45 minutes, and the obtained product is the 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 silicon dioxide material suitable for a fluorocarbon active agent-type superamphiphobic debris-carrying agent for water-based drilling fluids, and a preparation method and application thereof. Background technique [0002] As the exploitation of conventional oilfields in my country has basically entered the middle and later stages, the reservoir conditions for exploration and development are becoming more and more harsh, and unconventional complex structure wells such as deep wells and horizontal wells have become more and more development methods for unconventional oil and gas fields. The special well type puts forward higher requirements on the performance of the drilling fluid. In view of the difficulty of carrying cuttings often encountered in the process of drilling difficult wells, it is easy to form a cuttings bed downhole, which further leads to the increase ...

Claims

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Application Information

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Patent Type & Authority Applications(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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