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Preparation method of stable oil displacement agent for clay and application thereof

A technology of clay stabilization and oil displacement agent, which is applied in earth drilling, chemical instruments and methods, and drilling compositions, etc. It can solve problems such as single performance, poor comprehensive performance, and unsatisfactory application effect, and the effect is obvious. Effect

Active Publication Date: 2010-01-20
孙安顺
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The clay stabilizers currently used have poor selectivity, high cost, and relatively single performance. The application effect is not ideal, and the overall performance is not good. It needs to form a complex working fluid system with other performance modifiers before it can be applied on site.
There has been research work on this type of product in China, but most of them are based on the compounding of existing oil displacement agent and clay stabilizer, the application effect is not ideal, and it is greatly affected by the external environment

Method used

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  • Preparation method of stable oil displacement agent for clay and application thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0012] Embodiment 1, use dodecylamine as raw material preparation clay stabilized oil displacement agent:

[0013] Weigh 265kg of dodecylamine, raise the temperature to 75°C, add 154kg monomethyl fumarate dropwise, raise the temperature to 106°C to react for 7 hours after adding monomethyl fumarate dropwise, then add 69kg monoethanolamine, and stir evenly Then add 3.4kg of catalyst potassium ethylate, heat up to 116°C, react for 4 hours, then add 52kg of dichloroethane, stir evenly, add 160kg of potassium hydroxide, heat up to 134°C, react for 11 hours to obtain a clay-stabilized oil displacement agent .

Embodiment 2

[0014] Embodiment 2, prepare clay stabilized oil displacement agent with cetyl primary amine as raw material:

[0015] Weigh 220kg of hexadecyl primary amine, heat up to 64°C, add 126kg of methacrylic acid dropwise, raise the temperature to 94°C for 5 hours after adding methacrylic acid, then add 110kg of diethanolamine and 147kg of triethanolamine, stir After uniformity, add 6.2kg of catalyst sodium ethoxide, heat up to 152°C, and react for 2.5 hours, then add 32kg of dichloroethane, stir well, add 97kg of potassium hydroxide, heat up to 156°C, and react for 8 hours to obtain stable clay flooding agent.

Embodiment 3

[0016] Embodiment 3, use cetyl primary amine as raw material to prepare clay stabilized oil displacement agent:

[0017] Weigh 170kg of hexadecyl primary amine, raise the temperature to 64°C, add 98kg of methacrylic acid dropwise, after the dropwise addition of methacrylic acid, raise the temperature to 94°C and react for 5 hours, then add 85kg of diethanolamine and 113kg of triethanolamine, stir After uniformity, add 4.8kg of catalyst sodium ethylate, heat up to 152°C, react for 2.5 hours, then add 24.6kg of dichloroethane, stir evenly, add 74.7kg of potassium hydroxide, heat up to 156°C, react for 8 hours, and obtain stable clay oil repellant.

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Abstract

The invention relates to a preparation method of a stable oil displacement agent for clay and application thereof. The preparation method comprises the following steps: heating 150-300 parts of primary amine to 30-80 DEG C, dripping 114-171 parts of olefine acid or ethylacrylate to the primary amine, allowing the mixed solution to react at the temperature of 80-115 DEG C for 3-9h, adding 60-321 parts of monoethanolamine, diethanolamine or triethanolamine or any two mixtures thereof, stirring evenly, adding 1.3-10.2 parts of sodium ethylate or potassium ethylate to react at the temperature of 90-165 DEG C for 2-6h, additionally adding 24-78 parts of dichloroethane, stirring evenly, adding 80-224 parts of potassium hydroxide to react at the temperature of 100-160 DEG C for 5-12h to obtain the stable oil displacement agent for clay. The stable oil displacement agent for clay is applied to oil extraction by water flooding in oilfield. The stable oil displacement agent for clay prepared by the method has lower interfacial tension and higher anti-swelling property.

Description

Technical field: [0001] The invention relates to a preparation method and application of a clay-stabilized oil displacement agent used in the field of oil recovery. Background technique: [0002] The clay stabilizers currently used have poor selectivity, high cost, and relatively single performance. The application effect is not ideal, and the comprehensive performance is not good. It needs to form a complex working fluid system with other performance modifiers before it can be applied on site. There have been researches on this kind of products in China, but most of them are based on the compounding of existing oil displacement agents and clay stabilizers. The application effect is not ideal and is greatly affected by the external environment. Invention content: [0003] In order to solve the problems in the background technology, the present invention provides a preparation method and application of a clay-stabilized oil-displacement agent. The clay-stabilized oil-displa...

Claims

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Application Information

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IPC IPC(8): C09K8/584E21B43/22
Inventor 孙安顺
Owner 孙安顺
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