Composite microbial bacterial agent and its preparation method and application

A composite microbial inoculant and microorganism technology, which is applied in drilling compositions, chemical instruments and methods, and earth-moving drilling, etc. It can prevent oil chromatography wax, remove wax blockage, and improve fluidity.

Inactive Publication Date: 2016-11-09
东方金道(北京)科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] China's Liaohe Oilfield has abundant high-point oil reserves. The high-point oil has high wax content and high freezing point. As the temperature decreases, the viscosity increases sharply and the fluidity becomes poor. Severe oil precipitation and wax plugging are obvious, which makes it difficult to recover high pour point oil, and the recovery rate is low

Method used

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  • Composite microbial bacterial agent and its preparation method and application
  • Composite microbial bacterial agent and its preparation method and application
  • Composite microbial bacterial agent and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The preparation of embodiment 1 composite microbial bacterial agent

[0043] (1) Fermenting and culturing the thermophilic and halotolerant facultative anaerobic bacillus with the microorganism preservation number: CGMCC NO.6570 and the thermophilic urea bacillus with the microorganism preservation number: CGMCC NO.5818, respectively preparing bacterial liquids, namely Obtain thermophilic halotolerant facultative anaerobic bacillus bacterial agent and thermophilic urea bacillus bacterial agent;

[0044] In terms of mass percentage, each component in the medium for fermentation and cultivation of the thermophilic halotolerant facultative anaerobic bacillus and thermophilic urea bacillus is: liquid paraffin 2%, KH 2 PO 4 0.05%, Na 2 HPO 4 0.1%, (NH 4 ) 2 SO 4 0.2%, MgSO 4 ·7H 2 O 0.02%, CaCl 2 2H 2 O 0.001%, FeCl 3 0.01%, corn steep liquor dry powder 0.3%, trace element solution 0.2%, multivitamin solution 0.2%, and the balance is water; among them, trace eleme...

Embodiment 2

[0049] The preparation of embodiment 2 composite microbial bacterial agents

[0050] According to the method of Example 1, the composite microbial bacterial agent is prepared, the difference is: according to the volume ratio, thermophilic salt-tolerant facultative anaerobic bacillus bacterial agent: thermophilic urea bacterial agent: biosurfactant = 1:1:0.01 , that is.

Embodiment 3

[0051] The preparation of embodiment 3 composite microbial bacterial agents

[0052] According to the method of Example 1, the composite microbial bacterial agent is prepared, the difference is: according to the volume ratio, thermophilic salt-tolerant facultative anaerobic bacillus bacterial agent: thermophilic urea bacterial bacterial agent: biosurfactant = 3: 3: 0.5 , that is.

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Abstract

The present invention discloses a composite microbial agent, a preparation method therefor and an application thereof, belonging to the field of microbial enhanced oil recovery. The present invention firstly discloses a composite microbial agent, comprising: an Anoxybacillus sp. microbial agent, a Ureibacillus sp. microbial agent, and a biosurfactant. The present invention further discloses a composite microbial agent preparation method, comprising: mixing the Anoxybacillus sp. microbial agent, the Ureibacillus sp. microbial agent and the biosurfactant. The composite microbial agent of the present invention can be applied to improve the recovery rate of high pour point oil, improve the physical properties of high pour point oil, decrease viscosity of high pour point oil, increase fluidity of high pour point oil, and eliminate blocking wax at the near wellbore area of the well shaft of high pour point oil, thereby dramatically increasing the yield of high pour point oil.

Description

technical field [0001] The invention relates to a microbial agent, in particular to a composite microbial agent and a preparation method thereof. The invention also relates to the application of the composite microbial agent in enhancing high pour point oil recovery, which belongs to the field of microbial oil displacement agents. Background technique [0002] Microbial oil recovery technology refers to the technology of using microorganisms to enhance oil recovery, also known as microbial enhanced oil recovery technology, and its mechanism of action involves a complex biological, biochemical, chemical and physical process. Microbial enhanced oil recovery technology is a rapidly developing technology for enhanced oil recovery at home and abroad. The use of microorganisms is the most economical method of exploiting depleted oil reservoirs and improving the ultimate oil recovery. Microorganisms can reproduce on the spot in the oil reservoir, multiplying the affected area of ​​...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/582C09K8/584C09K8/524E21B43/22
CPCC09K8/582C09K8/584E21B43/16
Inventor 姜利滨王小通郑文涛华晶李东安
Owner 东方金道(北京)科技有限公司
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