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Nonionic gemini surface active agent for chemical oil removing agent in tertiary oil production, preparation method and application thereof

A chemical oil displacement agent and Gemini surface technology, applied in chemical instruments and methods, preparation of organic compounds, organic chemistry, etc., can solve problems such as damage, achieve low cost, good biodegradability, and simple preparation process

Inactive Publication Date: 2010-12-22
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

However, the large amount of alkali contained in it has caused great damage to the oil layers and oil wells near the oil field

Method used

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  • Nonionic gemini surface active agent for chemical oil removing agent in tertiary oil production, preparation method and application thereof
  • Nonionic gemini surface active agent for chemical oil removing agent in tertiary oil production, preparation method and application thereof
  • Nonionic gemini surface active agent for chemical oil removing agent in tertiary oil production, preparation method and application thereof

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Abstract

The invention discloses a nonionic gemini surface active agent for a chemical oil removing agent in tertiary oil production, a preparation method and application thereof. A structural formula of the nonionic gemini surface active agent is as follows, wherein R1 and R2 are respectively alkyl groups of C11 to C23; and n and m are respectively integers of 2 to 9. The nonionic gemini surface active agent is used for in tertiary oil production in an oil field, used as the oil removing agent for preparing a binary compound oil removing system, and has the performance of excellent salt resistance, high temperature resistance, and the like. Under the conditions that the temperature is 85 DEG C, the salinity achieves 50000mg / L and the content of high valence ions Ca<2+> and Mg<2+> achieves 2500mg / L, the surface active agent forms ultra-low interfacial tension 10-3 to 10-4mN / m with crude oil, thereby achieving an ideal oil removing effect.

Description

Technical field: The invention relates to an auxiliary agent used in the field of oil recovery, in particular to a nonionic gemini surfactant used in chemical oil displacement agents for tertiary oil recovery, a preparation method and application thereof. Background technique: Since the first oil crisis in the 1970s, countries all over the world have attached great importance to the research of enhanced oil recovery. ASP flooding is a method commonly used in various oil fields to enhance oil recovery. Ternary complex system is surfactant, polymer and alkali system. However, the large amount of alkali contained in it has caused great damage to the oil layers and oil wells near the oil field. And because the environment of underground oil reservoirs is very complicated, many oil reservoirs are under the conditions of high temperature, high salinity, and high calcium and magnesium ions (for example, the total salinity of some oil reservoirs in China's oilfields reaches 50000...

Claims

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Application Information

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