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Complex biological oil displacement agent and application thereof

A biological oil displacement and oil displacement technology, which is applied in the drilling composition, production fluid, wellbore/well components, etc., can solve the problem of high interfacial tension, difficulty in obtaining satisfactory oil displacement effect, and failure to reach the ultra-low value range, etc. problem, to achieve the effect of high oil displacement efficiency, low cost and simple preparation process

Inactive Publication Date: 2012-06-13
DAQING OILFIELD CO LTD
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Problems solved by technology

[0008] At present, the interfacial tension between a single rhamnolipid system and crude oil is relatively high, and has not reached the ultra-low range
The interfacial tension measured when the concentration of the rhamnolipid fermentation liquid is in the range of 0.5% to 1% is between 8.4 to 9.6mN / m, thus it can be seen that it is difficult to make the oil displacing agent with a single biosurfactant rhamnolipid Obtain satisfactory oil displacement effect

Method used

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  • Complex biological oil displacement agent and application thereof
  • Complex biological oil displacement agent and application thereof
  • Complex biological oil displacement agent and application thereof

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Embodiment Construction

[0043] The methods used in the following examples are conventional methods unless otherwise specified.

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Abstract

The invention discloses a complex biological oil displacement agent, which comprises a biosurfactant and a chemical surfactant which are prepared in a weight ratio of (1:1)-(8:1), wherein the biosurfactant is a rhamnolipid fermentation stock solution, and the chemical surfactant is fatty acid amide sulpho monoester potassium maleate. In the complex biological oil displacement agent, the using amount of the chemical surfactant is low (namely 0.0125 weight percent), and a complex system can reach ultra-low interfacial tension of less than 10<-2>mN / m order of magnitude, so the complex biological oil displacement agent has the advantages of high oil displacement efficiency, simple preparation process, low cost and the like, and is suitable for the popularization and application of the further improvement on a recovery ratio in high-water-content oil fields.

Description

technical field [0001] The invention relates to a compound biological oil displacement agent in the technical field of tertiary oil recovery and its application in oil displacement. Background technique [0002] Bio-displacement agent is a kind of surface-active substances synthesized by microorganisms with various structures, mainly divided into five categories: glycolipids, lipopeptides and lipoproteins, phospholipids and fatty acids, polymeric surfactants and particulate surfactants , biosurfactants commonly used in oil field flooding belong to lipopeptides and glycolipids. [0003] The performance of biological oil displacement agent is similar to that of chemical oil displacement agent, but in comparison, there are many advantages: ① biodegradable and will not cause re-pollution; ② non-toxic or low toxicity; ③ generally non-allergenic and digestible , so it can be used as an additive for cosmetics, food and functional food; ④It can be produced from industrial waste, wh...

Claims

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Application Information

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IPC IPC(8): C09K8/584C09K8/588E21B43/22
Inventor 乐建君伍晓林柏璐璐赵群李蔚侯兆伟王颖郭盟华张继元陈星宏刘洋窦续谋王蕊王艳玲
Owner DAQING OILFIELD CO LTD
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