Gemini surfactant for tertiary oil recovery chemical oil-displacing agent and preparation method thereof

A Gemini surface, chemical flooding technology, applied in chemical instruments and methods, preparation of organic compounds, organic chemistry, etc., can solve problems such as the decline in oil displacement efficiency, and achieve good biodegradability, excellent interfacial tension, and excellent salt resistance Effect

Active Publication Date: 2011-01-26
大庆高新区华龙祥化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

And it overcomes the problem that the oil displacement efficiency of the existing oil displacement agent decreases due to the phenomenon of chromatographic separation

Method used

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  • Gemini surfactant for tertiary oil recovery chemical oil-displacing agent and preparation method thereof
  • Gemini surfactant for tertiary oil recovery chemical oil-displacing agent and preparation method thereof
  • Gemini surfactant for tertiary oil recovery chemical oil-displacing agent and preparation method thereof

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Abstract

The invention discloses a gemini surfactant for a tertiary oil recovery chemical oil-displacing agent. The gemini surfactant has the structural formula shown in the specifications, wherein R1 and R2 are alkyl with 11 to 23 carbon atoms respectively. The surfactant of the invention has the advantages of single use without adding an alkali, harmlessness to a stratum, stable property, high capacity of reducing the oil/water interfacial tension and ensuring ultralow interfacial tension of 10<-3> to 10<-4>mN/m of crude oil/water in a wider range, and ideal oil displacing effect. The problem that the oil displacing efficiency of the conventional oil-displacing agent is reduced due to chromatographic separation is solved.

Description

Technical field: The invention relates to an auxiliary agent used in the field of oil recovery, in particular to a gemini surfactant used in chemical oil displacement agents for tertiary oil recovery and a preparation method thereof. Background technique: Many oilfields in our country have entered the late stage of development one after another, and the application of tertiary oil recovery technology has been widely valued. At the end of waterflood development, residual oil is distributed in the pores of reservoir rocks in a static spherical shape. Reducing interfacial tension is the only way to force the residual oil trapped in porous media to flow, and it is also an effective way to greatly improve oilfield production efficiency. The oil displacing agent must reduce the oil-water interfacial tension to 10 -3 mN / m or lower order of magnitude, otherwise there will be no practical value. It is difficult to reduce the oil-water interfacial tension to 10 due to simple surfac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/584C07C233/36C07C231/12
Inventor 孙安顺
Owner 大庆高新区华龙祥化工有限公司
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