Polyamine inhibitor for water-based drilling fluid and preparation method of polyamine inhibitor

A technology of polyamine inhibitor and water-based drilling fluid, which is applied in the field of oil drilling, can solve the problems of high cost and poor environmental protection performance, and achieve the effect of inhibiting hydration dispersion and inhibiting performance.

Inactive Publication Date: 2018-06-12
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Ensuring wellbore stability and effectively avoiding shale hydration and dispersion is a long-term challenge for shale gas development. Although oil-based drilling fluid has unique advantages in solving wellbore stability, it has high cost and poor environmental performance. There is an urgent need for highly efficient and environmentally friendly water-based drilling fluids

Method used

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  • Polyamine inhibitor for water-based drilling fluid and preparation method of polyamine inhibitor
  • Polyamine inhibitor for water-based drilling fluid and preparation method of polyamine inhibitor
  • Polyamine inhibitor for water-based drilling fluid and preparation method of polyamine inhibitor

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Effect test

Embodiment 1

[0033] Step 1: Weigh the following components by mass, maleic anhydride 78g, triethanolamine 213g, glacial acetic acid 10g, tap water 350g;

[0034] Step 2: place the weighed maleic anhydride and triethanolamine in the reactor at normal temperature;

[0035] Step 3: Raise the temperature in the reactor to 85°C within 40 minutes, and keep the temperature for 30 minutes;

[0036] Step 4: Continue to heat up to 180°C after the insulation, while keeping the pressure in the reactor at 20mm mercury column state with a vacuum pump, and react for 4 hours;

[0037] Step 5: After the reaction, the pressure was released by cooling and the temperature was lowered to 90°C.

[0038] Step 6: After reaching the required temperature, add glacial acetic acid and tap water, and prepare the polyamine inhibitor after 2 hours of reaction.

Embodiment 2

[0040] Step 1: Weigh the following components by mass, maleic anhydride 75g, triethanolamine 210g, glacial acetic acid 8g, tap water 348g;

[0041] Step 2: place the weighed maleic anhydride and triethanolamine in the reactor at normal temperature;

[0042] Step 3: Raise the temperature in the reactor to 80°C within 40 minutes, and keep the temperature for 30 minutes;

[0043] Step 4: Continue to heat up to 180°C after the insulation, while keeping the pressure in the reactor at 20mm mercury column state with a vacuum pump, and react for 4 hours;

[0044] Step 5: After the reaction, the pressure was released by cooling and the temperature was lowered to 90°C.

Embodiment 3

[0046] Step 6: After reaching the required temperature, add glacial acetic acid and tap water, and prepare the polyamine inhibitor after 2 hours of reaction.

[0047] Step 1: Weigh the following components by mass, maleic anhydride 80g, triethanolamine 215g, glacial acetic acid 12g, tap water 352g;

[0048] Step 2: place the weighed maleic anhydride and triethanolamine in the reactor at normal temperature;

[0049] Step 3: Raise the temperature in the reactor to 90°C within 40 minutes, and keep the temperature for 30 minutes;

[0050] Step 4: Continue to heat up to 180°C after the insulation, while keeping the pressure in the reactor at 20mm mercury column state with a vacuum pump, and react for 4 hours;

[0051] Step 5: After the reaction, the pressure was released by cooling and the temperature was lowered to 90°C.

[0052] Step 6: After reaching the required temperature, add glacial acetic acid and tap water, and prepare the polyamine inhibitor after 2 hours of reaction. ...

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Abstract

The invention discloses a polyamine inhibitor for a water-based drilling fluid and a preparation method of the polyamine inhibitor. The structural formula of the polyamine inhibitor is as shown in thespecification. The preparation method includes the steps of firstly, weighing, by weight, 75-80 parts of maleic anhydride, 210-215 parts of triethanolamine, 8-12 parts of glacial acetic acid and 348-352 parts of tap water; secondly, placing the weighed maleic anhydride and triethanolamine in a reaction kettle under normal temperature; thirdly, rising the temperature in the reaction kettle to 80-90 DEG C in 4 minutes, and keeping the temperature for 30 minutes; fourthly, rising the temperature to 180 DEG C after the heat preservation, and using a vacuum pump to keep pressure in the reaction kettle in a 20mm mercury column state to perform reaction for 4 hours; fifthly, after the reaction, cooling and performing pressure relief, and cooling to 90 DEG C; sixthly, adding the glacial acetic acid and the tap water when required temperature is reached, and performing reaction for 2 hours to obtain the polyamine inhibitor. The polyamine inhibitor is applicable to a shale gas water-based drilling fluid system.

Description

technical field [0001] The invention belongs to the field of oil drilling, in particular to a polyamine inhibitor for water-based drilling fluid and a preparation method thereof. Background technique [0002] Ensuring wellbore stability and effectively avoiding shale hydration and dispersion is a long-term challenge for shale gas development. Although oil-based drilling fluid has unique advantages in solving wellbore stability, it has high cost and poor environmental performance. There is an urgent need for water-based drilling fluids with high-efficiency suppression capabilities and environmental protection. The key to high-performance water-based drilling fluid technology lies in the development and application of high-efficiency inhibitors. By adding amine molecular polymers as inhibitors in conventional drilling fluids in China, the water-based drilling fluids have improved the inhibition of shale hydration expansion and dispersion. At present, polyamine high-performan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/035C09K8/24C07C213/06C07C219/08
CPCC09K8/035C07C213/06C07C219/08C09K8/24
Inventor 黄进军田月昕李文飞李学涯李春霞郭星波沈景原
Owner SOUTHWEST PETROLEUM UNIV
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