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Solid emulsifier with good emulsification stability for oil-based drilling fluid as well as preparation method and application of solid emulsifier

An oil-based drilling fluid and emulsion stabilization technology, applied in the field of drilling fluid emulsifier, can solve the problems of poor emulsification stabilization effect of emulsifier, and achieve good emulsion stabilization ability, enhanced hydrophilic performance, and good emulsification effect.

Active Publication Date: 2022-01-14
JINGZHOU JIAHUA TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the prior art, Chinese patent CN103980869A discloses a solid emulsifier for oil-based drilling fluid and its preparation method and its application in oil-based drilling fluid, which provides the demulsification voltage value of the solid emulsifier in oil-based drilling fluid, but The emulsion stabilization effect of the emulsifier is not good

Method used

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  • Solid emulsifier with good emulsification stability for oil-based drilling fluid as well as preparation method and application of solid emulsifier
  • Solid emulsifier with good emulsification stability for oil-based drilling fluid as well as preparation method and application of solid emulsifier

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preparation example Construction

[0026] The invention provides a method for preparing a solid emulsifier for oil-based drilling fluid with good emulsification stability, comprising the following steps:

[0027] Mixing the first rosin and the first maleic anhydride to perform a Diels-Alder reaction to obtain an addition product;

[0028] mixing the addition product with ethylenediamine to perform a first acylation reaction to obtain a first acylation reaction product;

[0029] mixing the acylation reaction product with the second maleic anhydride to perform a second acylation reaction to obtain a second acylation reaction product;

[0030] Mixing the second acylation reaction product with calcium oxide for neutralization reaction to obtain an intermediate product;

[0031] The intermediate product, sodium dodecylbenzenesulfonate and the second rosin are mixed to obtain the solid emulsifier for oil-based drilling fluid with good emulsification stability.

[0032] In the present invention, the first rosin is m...

Embodiment 1

[0061] (1) Heat 50 parts of gum rosin to melt, stir and add 15 parts of maleic anhydride, heat up to 220°C, Diels-Alder reaction occurs, the reaction time is 2 hours, and an addition product is formed;

[0062] (2) Slowly add 10 parts of ethylenediamine dropwise to the resulting addition product (dropping in 5 minutes), an acylation reaction occurs, react for 4 hours, and the product is the initial reaction material; after cooling down to 80°C, Add 10 parts of maleic anhydride to the reaction mixture for 1.5h;

[0063] (3) Add 15 parts of calcium oxide to the product of step (2), neutralize at a temperature of 80° C. for 2 hours, and pulverize the solid after cooling to room temperature to obtain a yellow powdery intermediate product;

[0064] (4) Mix 80 parts of intermediate product, 15 parts of sodium dodecylbenzenesulfonate, and 5 parts of gum rosin powder (particle size is 120 mesh), and the obtained yellow powder is the oil base with good emulsification stability of the t...

Embodiment 2

[0066] 1) Heat 45 parts of gum rosin to melt, stir and add 18 parts of maleic anhydride, heat up to 180°C, Diels-Alder reaction occurs, the reaction time is 4 hours, and an addition product is formed;

[0067] (2) Slowly add 12 parts of ethylenediamine dropwise to the resulting addition product (dropping in 10 minutes), an acylation reaction occurs, react for 1 hour, and the product is the initial reaction material; after cooling down to 100°C, Add 8 parts of maleic anhydride to , react for 1h;

[0068] (3) Add 17 parts of calcium oxide to the product obtained in step (2), neutralize for 1 hour at a temperature of 100° C., and pulverize the solid after cooling to room temperature to obtain a yellow powdery intermediate product;

[0069] (4) Mix 75 parts of intermediate product, 17 parts of sodium dodecylbenzenesulfonate, and 8 parts of gum rosin powder (150 mesh in particle size), and the obtained yellow powder is the oil base with good emulsification stability of the target p...

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Abstract

The invention provides a solid emulsifier with good emulsification stability for oil-based drilling fluid as well as a preparation method and application of the solid emulsifier, and belongs to the field of drilling fluid emulsifiers. The preparation method comprises the steps: mixing first rosin and first maleic anhydride, and carrying out Diels-Alder reaction to obtain an addition product; mixing the addition product with ethylenediamine, and carrying out a first acylation reaction to obtain a first acylation reaction product; mixing the first acylation reaction product with second maleic anhydride, and carrying out a second acylation reaction to obtain a second acylation reaction product; mixing the second acylation reaction product with calcium oxide for neutralization reaction to obtain an intermediate product; and mixing the intermediate product, sodium dodecyl benzene sulfonate and second rosin to obtain the solid emulsifier with good emulsification stability for the oil-based drilling fluid. The solid emulsifier prepared by the method has good emulsifying effect and emulsifying stability. Meanwhile, as the solid emulsifier is a powdery solid, the solid emulsifier is slightly influenced by temperature and is suitable for being used in a low-temperature environment.

Description

technical field [0001] The invention relates to the technical field of drilling fluid emulsifiers, in particular to a solid emulsifier for oil-based drilling fluid with good emulsification stability and a preparation method and application thereof. Background technique [0002] As conventional oil and gas resources are gradually drilled in complex areas such as deep water and harsh climates, the temperature difference between day and night in these areas is large, especially in the process of drilling and development in harsh climate areas, the outdoor operating temperature is as low as 0-15 °C, and in some extremely cold areas even as low as -30°C, which requires the drilling fluid to have good stability and rheological properties. The oil-based drilling fluid system is commonly used in the development of complex formations such as deep water wells and unconventional oil and gas reservoirs such as shale gas, and the emulsifier is the core treatment agent of the oil-based dr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/36C07C231/02C07C233/62
CPCC09K8/36C07C231/02C07C2603/86C07C233/62
Inventor 吴娇由福昌许明标
Owner JINGZHOU JIAHUA TECH
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