Directional adjustment and control method for oil reservoir endogenous functional microbes

A technology of functional microorganisms and microorganisms, which is applied in the direction of chemical instruments and methods, earth drilling, drilling compositions, etc., can solve the problems of poor pertinence of functional microorganisms and inability to activate functional microorganisms in a targeted and efficient manner, and achieve reduced dosage and field tests Good effect and improved activation efficiency
CN111119818AActive Publication Date: 2020-05-08CHINA PETROLEUM & CHEM CORP +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA PETROLEUM & CHEM CORP
Publication Date
2020-05-08

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Abstract

The invention belongs to the technical field of microbial oil displacement, and particularly relates to a directional adjustment and control method for oil reservoir endogenous functional microbes. The method specifically comprises the following steps of screening a test oil reservoir, separating and amplifying sulfate reducing bacteria phages, screening the sulfate reducing bacteria phages, screening a directional adjustment and control activator system, evaluating oil displacement performance of the directional adjustment and control activator system, performing a field test and performing effect evaluation. The method disclosed by the invention has the advantages of being reasonable, simple in process, simple to operate, safe and reliable, less in investment, low in cost and good in field test effect, reduces the cost by 30% or more, and improves the recovery efficiency by 20% or more according to the field test.
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Description

technical field

[0001] The invention belongs to the technical field of microbial oil displacement, and in particular relates to a method for directional control of endogenous functional microorganisms in oil reservoirs. Background technique

[0002] There are many types of endogenous microorganisms in oil reservoirs, including functional microorganisms that are beneficial to oil production, and many microorganisms that are harmful to the petroleum industry, such as sulfate-reducing bacteria. At present, endogenous microbial oil recovery mainly relies on injecting different activators screened indoors into the reservoir to selectively activate the functional microorganisms in the reservoir. recovery factor. Since different types of microorganisms have very similar nutrient requirements, there is a nutrient competition relationship between functional microorganisms and harmful microorganisms. The activator injected into the formation will be metabolized and utilized by harmfu...

Claims

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