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Bacterium capable of reducing crude oil viscosity

A crude oil and viscosity technology, applied in the direction of bacteria, microorganism-based methods, microorganisms, etc., can solve the problems of difficult to realize economical and effective exploitation of oil reservoirs, restrict industrial applications, and high viscosity of reservoir oil, so as to improve oil recovery and improve oil recovery. Mobility, effects of increased porosity and permeability

Inactive Publication Date: 2012-10-31
HEILONGJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the periphery of the oil field, low-permeability and low-abundance oil-bearing blocks have large geological reserves, and oil is buried in underground rock pores. Some reservoirs have high oil viscosity and low permeability, relying on mechanical pressure, water injection or polymer injection. Exploitation is costly and technically difficult, making it difficult to achieve economical and effective exploitation of these oil reservoirs
[0003] Microbial oil recovery technology, that is, microbial enhanced oil recovery technology, injects screened microorganisms into the oil reservoir, utilizes the beneficial activities of microorganisms in the oil reservoir, and the interaction between the metabolites of microorganisms and the liquid and solid phases in the reservoir. It is a comprehensive technology for improving crude oil recovery by changing some physical and chemical characteristics of crude oil, improving the flow properties of crude oil, and improving crude oil recovery by affecting the properties of the crude oil / rock oil / water interface. It has the characteristics of low cost, environmental protection, etc. However, the types of excellent bacterial strains that can reduce the viscosity of crude oil are limited, which restricts the industrial application of this technology

Method used

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specific Embodiment approach 1

[0010] Specific embodiment one: the bacterium that reduces the viscosity of crude oil in this embodiment is Pseudomonas sp. Hd-DN-2-1, belongs to Pseudomonas (Pseudomonas), and has been preserved in the Chinese typical culture Central preservation, the preservation number is CCTCC No: M 2010341, and the preservation date is December 09, 2010; it is a Gram-negative bacterium, rod-shaped, 1.5-4 μm in length and 0.5-1 μm in width; cultured in beef extract peptone Colorless and transparent colonies are formed on the base, round, 0.5-1mm in diameter, with smooth surface and neat edges.

[0011] In this embodiment, Pseudomonas sp. Hd-DN-2-1 is routinely identified according to the "Bergey's Bacteriological Identification Handbook". The experimental results are: using glucose, using xylose, and using mannose Alcohol, using arabinose, using citrate, using nitrate, using ammonium nitrogen, lecithinase test negative, lactose test negative, hydrogen sulfide production test negative, cell...

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Abstract

The invention relates to a bacterium capable of reducing crude oil viscosity. The bacterium capable of reducing the crude oil viscosity of the invention is a pseudomonas Hd-DN-2-1 belonging to pseudomonas, and the invention is preserved in China Center for Type Culture Collection in preservation number of CCTCC No.M2010341 in 9 Dec., 2010. The bacterium capable of reducing crude oil viscosity of the invention can realize obvious viscosity reducing effect, and the viscosity reducing rate can reach 51.75; the bacterium is characterized by producing organic acid such as formic acid, acetic acid,propionic acid, butyric acid, succinic acid, lactic acid and the like which can effectively dissolve the depositional carbonate in the hole of oil reservoir rock in underground mineral reserves, increasing porosity and permeability of the oil reservoir, improving the crude oil flowing environment and the fluidity, and reducing the crude oil viscosity, in order that having more effective exploitation in tertiary oil recovery.

Description

technical field [0001] The invention relates to a bacterium for reducing the viscosity of crude oil. Background technique [0002] In the periphery of the oil field, low-permeability and low-abundance oil-bearing blocks have large geological reserves, and oil is buried in underground rock pores. Some reservoirs have high oil viscosity and low permeability, relying on mechanical pressure, water injection or polymer injection. Exploitation is costly and technically difficult, making it difficult to realize economical and effective exploitation of these oil reservoirs. [0003] Microbial oil recovery technology, that is, microbial enhanced oil recovery technology, injects screened microorganisms into the oil reservoir, utilizes the beneficial activities of microorganisms in the oil reservoir, and the interaction between the metabolites of microorganisms and the liquid and solid phases in the reservoir. It is a comprehensive technology for improving crude oil recovery by changi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12N1/20C12R1/38
Inventor 康宏吴国峰吴桐郑春英颜培强何俊赵晨曦黄微薇李盛贤赵丹丹曹凤麟
Owner HEILONGJIANG UNIV
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