Organic-inorganic composite cement-based self-healing agent based on authigenic healing as well as preparation method and application thereof

A self-healing and inorganic composite technology, which is applied in the field of drilling and cementing in oilfield development, can solve problems such as unreported preparation methods, and achieve the effects of improving self-healing efficiency, high interface adhesion, and improving matrix compactness

Active Publication Date: 2021-08-13
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The organic-inorganic composite cement-based self-healing agent based on self-healing and its preparation method have not been reported yet.

Method used

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  • Organic-inorganic composite cement-based self-healing agent based on authigenic healing as well as preparation method and application thereof
  • Organic-inorganic composite cement-based self-healing agent based on authigenic healing as well as preparation method and application thereof
  • Organic-inorganic composite cement-based self-healing agent based on authigenic healing as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The preparation method of the organic-inorganic composite cement-based self-healing agent based on self-healing comprises the following steps:

[0038] (1) Dissolve 17.80 parts of 2-acrylamido-2-methylpropanesulfonic acid and 1.15 parts of acrylic acid in 101 parts of distilled water in order by mass, adjust the pH to 6, then add 4.60 parts of acrylamide, stir and heat up to 55°C , to obtain a mixed solution;

[0039] (2) Add 0.30 parts of silane coupling agent γ-methacryloxypropyltrimethoxysilane (KH-570) into 5 parts of absolute ethanol, and stir evenly to obtain a silane coupling agent solution; Agent potassium persulfate was added to 20 parts of distilled water, and stirred uniformly to obtain an initiator solution;

[0040] (3) Under stirring, drop the silane coupling agent solution and the initiator solution into the mixed solution at the same time; adjust the temperature to 75° C., and react for 2.5 hours to obtain a light yellow viscous liquid;

[0041] (4) Un...

Embodiment 2

[0043] The preparation method of the organic-inorganic composite cement-based self-healing agent based on self-healing comprises the following steps:

[0044](1) Dissolve 17.25 parts of 2-acrylamido-2-methylpropanesulfonic acid and 1.2 parts of itaconic acid in 110 parts of distilled water in order by mass, adjust the pH to 5.5, and then add 5.10 parts of acrylamide monomer N , N-dimethylacrylamide, stirred and heated to 50°C to obtain a mixed solution;

[0045] (2) Add 0.36 parts of silane coupling agent vinyltriethoxysilane to 4 parts of absolute ethanol, and stir evenly to obtain a silane coupling agent solution; add 0.12 parts of initiator azobisisobutylamidine hydrochloride to 12 Parts of distilled water, stirred evenly to obtain the initiator solution;

[0046] (3) Under stirring, drop the silane coupling agent solution and the initiator solution into the mixed solution obtained in step (1) at the same time; react at 70° C. for 4 hours to obtain a light yellow viscous l...

Embodiment 3

[0049] The preparation method of the organic-inorganic composite cement-based self-healing agent based on self-healing comprises the following steps:

[0050] (1) Dissolve 18.60 parts of 2-acrylamido-2-methylpropanesulfonic acid and 0.75 parts of maleic anhydride in 95 parts of distilled water in order by mass, adjust the pH to 7, and then add 4.20 parts of acrylamide monomer propylene Amide, stirred and heated to 60 ° C to obtain a mixed solution;

[0051] (2) Add 1.80 parts of silane coupling agent vinyltriisopropoxysilane into 8 parts of absolute ethanol, and stir evenly to obtain a silane coupling agent solution; add 0.168 parts of initiator azobisisobutylamidine hydrochloride 23 parts of distilled water, stirred evenly to obtain initiator solution;

[0052] (3) Under stirring, drop the silane coupling agent solution and the initiator solution into the mixed solution obtained in step (1) at the same time; react at 80° C. for 2 hours to obtain a light yellow viscous liquid...

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Abstract

The invention discloses an organic-inorganic composite cement-based self-healing agent based on authigenic healing and a preparation method and an application thereof. The preparation method comprises the following steps: dissloving 2-acrylamido-2-methylpropanesulfonic acid and carboxylic acid monomers in distilled water, adjusting pH, then adding acrylamide monomers, increasing the temperature to 50-60 DEG C, and obtaining a mixed solution; adding a silane coupling agent into absolute ethyl alcohol to obtain a silane coupling agent solution; adding an initiator into distilled water, and uniformly stirring to obtain an initiator solution; under stirring, dropwise adding the silane coupling agent solution and the initiator solution into the mixed solution at the same time; reacting to obtain a faint yellow viscous liquid; and adding cement into the faint yellow viscous liquid, stirring, performing vacuum freeze drying, grinding or crushing to obtain the organic-inorganic composite cement-based self-healing agent based on authigenic healing. The method is low in production cost, simple in process, easy for industrial production, high in autogenous healing efficiency and capable of realizing effective repair of cracks.

Description

technical field [0001] The invention relates to the field of drilling-like cementing for oil field development, in particular to an organic-inorganic composite cement-based self-healing agent based on self-healing, a preparation method and an application. Background technique [0002] In the exploration and drilling process of oil and gas production, the cement sheath plays a role in supporting and protecting the casing, isolating oil, water and gas layers, and ensuring the sealing integrity of the wellbore. Its quality will directly affect the service life of the oil and gas well. However, due to the brittleness of the cement material itself and the complexity of the formation environment, such as high temperature, high pressure, corrosive fluid, etc., the appearance of micro-cracks and micro-annulus is inevitable, which will reduce the durability of the cement sheath to a certain extent, seriously Sometimes it will lead to the failure of interlayer isolation, threaten the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/16C04B28/00C08F220/58C08F220/06C08F220/56C08F230/08C08F222/02C08F222/06
CPCC04B40/0039C04B24/163C04B28/00C08F220/585C08F220/06C08F220/56C08F230/085C08F222/02C08F220/54C08F222/06C04B22/08
Inventor 郭锦棠刘明胡苗苗赵佳琪
Owner TIANJIN UNIV
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