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Biological process oil extraction method for prolonging period of validity by use of microbe to drive oil

A microbial oil recovery and microbial flooding technology, which is applied in the direction of production fluid, earth drilling, wellbore/well components, etc., can solve problems such as imbalance of nutrient composition, waste of microbial resources, and influence on the ability and effect of microorganisms

Inactive Publication Date: 2003-10-08
EAST CHINA UNIV OF SCI & TECH
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  • Abstract
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Problems solved by technology

[0003] The existing microbial oil recovery method only pays attention to the reasonable allocation of microorganisms and their nutrients injected into the oil reservoir, but does not fully pay attention to the fact that after the microorganisms are injected into the reservoir, the nutrients injected at the same time are continuously consumed by the microorganisms and diluted by the injected water. The concentration of various nutrients is reduced; the adsorption amount of various nutrients in the formation is different, resulting in an imbalance in the proportion of nutrients, and these changes may lead to a decrease in microbial activity.
Seriously affect the ability and effect of microorganisms, and eventually cause the waste of injected microorganism resources

Method used

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Embodiment Construction

[0013] The present invention is described further below:

[0014] First, microorganisms and nutrient solution are injected from the microbial injection well, and then water is injected; the production fluid of the beneficial oil production well is periodically tested, and the sampling period of the production fluid is 7-15 days. The samples taken are placed in clean glassware and analyzed within 24 hours. Microbial concentration analysis was carried out on the production fluid samples of benefit oil production wells by the plate viable culture counting method; the glycolipid surfactants in the production fluid samples of benefit oil production wells were analyzed by the "sulfuric acid-phenol" method; the "acidification precipitation" was adopted The method was used to analyze the lipopeptide surfactant in the output fluid sample of the benefit oil production well; the acid-base titration method was used to analyze the total amount of organic acids in the output fluid sample of...

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Abstract

A microbial petroleum-recovering method for elongating its effective period features that the microbes and their metabolite in the liquid output from oil well are detected and analyzed to evaluate the activity of microbes and the nutritive liquid is supplemented in time according to evaluated result for increasing the activity of microbes.

Description

technical field [0001] The invention relates to an improved method for microbial oil recovery. Background technique [0002] Microbial oil recovery is an oil recovery technology that uses beneficial activities of microorganisms such as degradation of crude oil and / or metabolites such as biosurfactants, organic acids, alcohols, etc. to enhance oil recovery. [0003] The existing microbial oil recovery method only pays attention to the reasonable allocation of microorganisms and their nutrients injected into the oil reservoir, but does not fully pay attention to the fact that after the microorganisms are injected into the reservoir, the nutrients injected at the same time are continuously consumed by the microorganisms and diluted by the injected water. The concentration of nutrients decreases; the different adsorption amounts of various nutrients in the formation cause the imbalance of nutrient composition, and these changes may lead to the reduction of microbial activity. S...

Claims

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Application Information

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IPC IPC(8): E21B43/22
Inventor 牟伯中刘金峰
Owner EAST CHINA UNIV OF SCI & TECH
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