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Method for oil displacement by activating indigenous microbes through slow release action

A technology of original microorganisms and oil displacement method, which is applied in the field of oil displacement where the slow release activates the original microorganisms, can solve the problems of continuous and stable nutrient supply to microorganisms, poor implementability, loss of nutrients, etc., and achieve Improve the affected area of ​​water injection, reduce nutrient loss and avoid waste

Inactive Publication Date: 2011-09-14
E TECH ENERGY TECH DEV CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this is that it cannot meet the best conditions for continuous and stable nutrient supply to microorganisms; in addition, due to the influence of the stratum hypertonic zone, a large amount of nutrients will be lost along with the hypertonic zone, resulting in waste of chemicals
In actual production, if long-term continuous injection is used, it will cause technical problems such as greatly increasing the work intensity on site and poor implementability.

Method used

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  • Method for oil displacement by activating indigenous microbes through slow release action
  • Method for oil displacement by activating indigenous microbes through slow release action

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The oil displacement method that the slow-release effect activates the original microorganisms includes the production and construction process of the slow-release nutrient microspheres:

[0026] The production method of slow-release nutrient microspheres: will contain 300kg sucrose, 50kg peptone, 30kgKH 2 PO 4 , 1% divinylbenzene, 1% BPO methyl acrylate solution suspended in 1 ton of water containing 1% sodium dodecylbenzenesulfonate and 0.5% gelatin at 40 °C (the volume of the oil phase and the water phase Ratio of 1:3), adjust the power of the ultrasonic emulsifier, after the size of the liquid beads is suitable and the particle size is uniform, the temperature is raised to 60°C at a speed of 5°C / 10min, polymerized for 2 hours, and the temperature is still raised to 85°C at the same speed, polymerized for 8 80-100nm nutrient microsphere preparations with varying drug loads were prepared within hours.

[0027] Process implementation: Suspend the slow-release nutrien...

Embodiment 2

[0029] The oil displacement method that the slow-release effect activates the original microorganisms includes the production and construction process of the slow-release nutrient microspheres:

[0030] The production method of slow-release nutrient microspheres: will contain 500kg sucrose, 50kg molasses, 30kgK 2 HPO 4 , 1% divinylbenzene, 1% BPO methyl acrylate solution suspended in 1 ton of water containing 1% sodium dodecylbenzenesulfonate and 0.5% gelatin at 40 °C (the volume of the oil phase and the water phase Ratio of 1:3), adjust the power of the ultrasonic emulsifier, after the size of the liquid beads is suitable and the particle size is uniform, the temperature is raised to 60°C at a speed of 5°C / 10min, polymerized for 2 hours, and the temperature is still raised to 85°C at the same speed, polymerized for 8 50-80nm nutrient microsphere preparations with varying drug loads were prepared within hours.

[0031] Process implementation: Suspend the slow-release nutrien...

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Abstract

The invention relates to a method for oil displacement by activating indigenous microbes through slow release action, belonging to the technical field of biological oil displacement. The method for oil displacement by activating indigenous microbes through slow release action is characterized by comprising steps as follows: indigenous microbes are activated to increase the quantity of beneficial indigenous microbes and the concentration of beneficial metabolites of the microbes, improve the properties of crude oil and enhance the oil recovery ratio; and nutrient substances for the microbes are wrapped by particles having slow release action and injected into the stratum along with injection water, and the microspheres wrapping the nutrient substances slowly release the nutrient substances in the stratum, thus providing nutrition to the indigenous microbes. The invention has the advantages that the process is simple to realize and convenient to operate, the nutrition loss can be reduced, the waste can be avoided, the microbial growth is promoted, the number of construction times is decreased, the on-site workload is reduced, the particles can be completely degraded by the microbes, the permanent stratum blockage can not be caused, the application is wide and the like.

Description

technical field [0001] The invention belongs to the technical field of biological oil flooding, in particular to an oil flooding method for activating native microorganisms through sustained release. Background technique [0002] Microbial flooding technology belongs to tertiary oil recovery technology and is a high-tech biological technology. Bioflooding technology includes activating the original microorganisms, and by increasing the number of beneficial original microorganisms and the concentration of beneficial metabolites of microorganisms, the purpose of improving the properties of crude oil and enhancing the recovery factor is achieved. [0003] At present, the more common original microbial flooding technology is to inject a large amount of high-concentration nutrient solution in a slug manner, and diffuse in the formation to provide nutrients for the original microorganisms. The disadvantage of this method is that it cannot meet the best conditions for continuous a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/22C09K8/58
Inventor 胡欣
Owner E TECH ENERGY TECH DEV CORP
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