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
CN101629073AActive Publication Date: 2010-01-20孙安顺
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
孙安顺
Publication Date
2010-01-20

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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.
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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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