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Amine-based inhibitor for water-based drilling fluid, water-based drilling fluid system and preparation method

A technology of water-based drilling fluid and inhibitor, which is applied in the field of water-based drilling fluid system and amine-based inhibitor for water-based drilling fluid, which can solve the problem of insufficient stability to meet construction needs, weak inhibition performance, and water-based drilling fluid flow. Issues such as greater impact of degeneration

Active Publication Date: 2020-06-02
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, polyamine inhibitors have better inhibitory performance than monomeric amine inhibitors, but have a greater impact on the rheology of water-based drilling fluids
Monomer amine inhibitors have little effect on the rheology of water-based drilling fluids, but their inhibitory performance is weaker than that of polyamine inhibitors
When drilling into complex layers such as shale layers that are easy to hydrate, the stability of mud shale under the action of monomeric amine inhibitors is still not enough to meet the construction needs

Method used

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  • Amine-based inhibitor for water-based drilling fluid, water-based drilling fluid system and preparation method
  • Amine-based inhibitor for water-based drilling fluid, water-based drilling fluid system and preparation method
  • Amine-based inhibitor for water-based drilling fluid, water-based drilling fluid system and preparation method

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preparation example Construction

[0035] In the first embodiment of the present application, a method for preparing an amine-based inhibitor for water-based drilling fluid is provided, comprising the following steps:

[0036] Mix polyol amines with chloropropane compounds to react to obtain polyalcohol acid propylammonium chloride;

[0037] Wherein, the polyol amine includes triethanolamine and optional ethanolamine and / or diethanolamine, and the chloropropane compound is selected from epichlorohydrin, methyl epichlorohydrin, trichloropropane, 2-methyl- One or more of 2-chloropropane and 2-methyl-1-chloropropane.

[0038] In the above preparation method, when the polyol amine includes triethanolamine, a nucleophilic substitution reaction occurs between triethanolamine and chloropropane compounds to obtain compound 1 shown in formula I, as shown in reaction formula 1:

[0039]

[0040] Wherein, as chloropropane compound comprises epichlorohydrin, group R2 is

[0041] Such as chloropropane compounds inclu...

Embodiment 1

[0091] (1) Add 100g of water to a 500mL three-necked flask;

[0092] (2) In the there-necked flask, add 100g polyol amine while stirring, and the polyol amine is triethanolamine;

[0093] (3) Add 100g of chloropropane compound dropwise in a three-necked flask, and the chloropropane compound is methyl epichlorohydrin;

[0094] (4) After the dropwise addition, the temperature was raised to 70° C., and the reaction was kept for 4 hours to obtain the amine-based inhibitor 1.

Embodiment 2

[0096] (1) Add 100g of water to a 500mL three-necked flask;

[0097] (2) In the three-necked flask, add 127.5 g of polyol amine while stirring, the polyol amine is a mixture of triethanolamine and ethanolamine, wherein the weight ratio of triethanolamine and ethanolamine is 1:10;

[0098] (3) Add 90g of chloropropane compounds dropwise in a three-necked flask, and the chloropropane compounds are trichloropropane;

[0099] (4) After the dropwise addition, the temperature was raised to 70° C., and the mixture was kept for 4 hours to obtain the amine-based inhibitor 2.

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Abstract

The invention relates to an amine-based inhibitor used for water-based drilling fluid and a preparation method thereof. The amine-based inhibitor comprises polyol acid propyl ammonium chloride, and the polyol acid propyl ammonium chloride at least comprises a compound 1 shown in a formula I, or at least comprises a compound 2 shown in a formula II and a compound 3 shown in a formula III. By introducing an alcoholic hydroxyl group, or introducing the alcoholic hydroxyl group and a carboxyl group, the hydrophilcity of the amine-based inhibitor is improved, so that the inhibition performance of the amine-based inhibitor is increased, influence of the amine-based inhibitor on rheological property of the drilling fluid system is reduced, and the compatibleness of the amine-based inhibitor is increased.

Description

technical field [0001] The application relates to the field of inhibitors for water-based drilling fluids, in particular to an amine-based inhibitor for water-based drilling fluids. In addition, the present application also relates to a preparation method of an amine-based inhibitor for water-based drilling fluid, and a water-based drilling fluid system. Background technique [0002] When drilling mud shale in the process of oil exploration and development, the mud shale well wall is easy to hydrate, expand and disperse, leading to instability and even collapse of the well wall. Drilling fluid is a circulating flushing medium used in oil drilling, which has inhibitory properties and can prevent the wall of the well from collapsing. Among them, the oil-based drilling fluid has a better inhibitory performance on mud shale, but it causes great environmental pollution. Considering the environmental protection factor, water-based drilling fluid is used more and more. However, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C209/12C07C211/63C07C227/08C07C229/12C07C229/42C07C213/08C07C217/84C09K8/035C09K8/24
Inventor 张振华华桂友郑斌曹晓晖关忠良姚如钢
Owner BC P INC CHINA NAT PETROLEUM CORP
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