A kind of amide compound, clay stabilizer, its preparation method and application

The technology of amide compound and clay stabilizer is applied in the field of amide compound, its preparation and clay stabilizer, which can solve the problems of increasing the cost of drilling fluid, adversely affecting the performance of drilling fluid, limiting the scope of application, etc. Stable product quality and controlling the effect of formation pulping

Active Publication Date: 2021-03-02
中石化石油工程技术服务有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In practical applications, although the above-mentioned inorganic salts and organic salts have strong inhibitory properties, they need to be added in a large amount to work, which will easily have a negative impact on the performance of the drilling fluid and will also increase the drilling fluid. cost, which limits its scope of application

Method used

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  • A kind of amide compound, clay stabilizer, its preparation method and application
  • A kind of amide compound, clay stabilizer, its preparation method and application
  • A kind of amide compound, clay stabilizer, its preparation method and application

Examples

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preparation example Construction

[0041] The invention provides a kind of preparation method of clay stabilizer, comprises the following steps:

[0042] The citric acid is reacted with polyethylene polyamine to obtain an amide compound; the polyethylene polyamine is selected from diethylene triamine, triethylene tetramine, tetraethylene pentamine, pentaethylene hexamine or hexaethylene heptamine; the Amide compounds have the structure of formula I:

[0043]

[0044] Wherein, n is selected from an integer between 1 and 5;

[0045] The material including the amide compound is discharged to obtain a clay stabilizer.

[0046] The invention synthesizes the clay stabilizer with amide groups and other groups through the amidation reaction, which has a good effect of inhibiting clay hydration and dispersion, and does not affect the performance of drilling fluid at the same time, which is beneficial to application.

[0047] In the present invention, citric acid and polyethylene polyamine are added into a reaction ...

Embodiment 1

[0061] Add citric acid and tetraethylenepentamine into the reaction flask with agitator and condensation according to the ratio of substances of 1:2.50, raise the temperature to 150°C, add 0.5% phenylboronic acid accounting for the mass of the reaction raw materials, and proceed at 170°C After amidation reaction for 2 hours, after the reaction time is up, cool down to 60°C, adjust the pH value to 6.5 with hydrochloric acid with a mass fraction of 18%, cool down to room temperature, and discharge the clay stabilizer for drilling fluid, which is a brown viscous liquid .

[0062] Inhibition rate evaluation method:

[0063] Take 350mL of distilled water, add 0.5% sodium carbonate, dissolve and add 10% calcium bentonite (calcium bentonite for drilling fluid produced by Weifang Huawei Bentonite Group Co., Ltd.), stir at high speed for 20 minutes, and roll at 120°C for 12 hours to obtain a blank Slurry: Take it out after cooling down, stir at high speed for 5 minutes, measure the vi...

Embodiment 2

[0068] Add citric acid and tetraethylenepentamine to the reaction bottle with agitator and condensation according to the ratio of substances of 1:3.05, raise the temperature to 150°C, add phenylboronic acid accounting for 2% of the mass of the reaction raw materials, and react at 150°C After 10 hours, after the reaction time is up, cool down to 60°C, adjust the pH value to 8.0 with 18% hydrochloric acid, cool down to room temperature, and discharge to obtain the clay stabilizer for drilling fluid, which is a brown viscous liquid.

[0069] The inhibition rate was evaluated according to the method in Example 1, and the results showed that the relative inhibition rate of the product was 91.8%.

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Abstract

The invention provides an amide compound, a clay stabilizer, a preparation method and application thereof. The clay stabilizer provided by the invention is made of a material including an amide compound shown in formula I, which simultaneously contains an amide group, a hydroxyl group and an amine group, etc. Various groups. In the present invention, the clay stabilizer has a good effect of inhibiting the hydration and dispersion of clay, and can effectively control the dispersion of clay without affecting the performance of drilling fluid. Also, this product can also be used with K + , NH 4 + and other inorganic cationic anti-slump agents are used together as anti-slump and inhibitors in drilling fluids, which can effectively inhibit clay hydration and dispersion, flocculate drill cuttings, and control formation slurry. Water-injected clay stabilizer for easy application. In addition, the product of the invention has low production cost, high production efficiency and stable product quality.

Description

technical field [0001] The invention relates to the technical field of oilfield chemicals for petroleum drilling, in particular to an amide compound, a clay stabilizer, a preparation method and application thereof. Background technique [0002] With the development of petroleum engineering technology, there are more and more drilling operations such as deep wells, extended-reach wells and horizontal wells, and the formations encountered are becoming more and more complex. Large changes in eye trajectory and other characteristics lead to serious collapse, expansion and shrinkage of mud shale formations, and severe slurry production, which puts forward higher requirements for the suppression ability of water-based drilling fluids. High-efficiency clay stabilizers are the key to ensuring wellbore stability and drilling fluid inhibition, among which inorganic salts and organic salts are currently the most widely used drilling fluid inhibitors or clay stabilizers. [0003] The i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C235/10C07C231/02C09K8/035C09K8/22
CPCC07C231/02C07C235/10C09K8/035C09K8/22C09K2208/12
Inventor 王中华
Owner 中石化石油工程技术服务有限公司
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