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Biological inhibitor suitable for controlling polymer viscosity loss in virtue of ecological regulation thought and use method thereof

A biological inhibitor, viscosity loss technology, applied in the direction of drilling compositions, chemical instruments and methods, etc., can solve the problems of bacterial resistance, microbial toxicity, etc., achieve obvious effects, ensure stable operation and production, and ensure flooding The effect of the oil effect

Pending Publication Date: 2020-09-04
HUACHEN ENVIRONMENTAL PROTECTION ENERGY (GUANGZHOU) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, long-term use of a fungicide will cause bacteria to develop drug resistance, and the fungicide is not specific for killing harmful bacteria, but also has a toxic effect on microorganisms that are beneficial to oil field exploitation

Method used

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  • Biological inhibitor suitable for controlling polymer viscosity loss in virtue of ecological regulation thought and use method thereof
  • Biological inhibitor suitable for controlling polymer viscosity loss in virtue of ecological regulation thought and use method thereof
  • Biological inhibitor suitable for controlling polymer viscosity loss in virtue of ecological regulation thought and use method thereof

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specific Embodiment approach 1

[0017] Specific embodiment one: In this embodiment, a kind of biological inhibitor suitable for controlling the viscosity loss of polymer by the idea of ​​ecological regulation is composed of 15% to 25% of denitrifying bacterial fermentation broth, 0.02% to 0.05% of nutrient elements and residual amount of water composition.

[0018] The living environment of denitrifying bacteria is similar to that of sulfate reducing bacteria, and they can survive in the same environment. When the nutrients in the living environment are limited, denitrifying bacteria have advantages in substrate affinity, reaction thermodynamics and low redox potential. Prioritize the use of limited nutrients, thereby inhibiting the growth of sulfate-reducing bacteria; denitrification intermediate NO 2 - , N 2 O and NO can inhibit SRB. NO 2 - Can inhibit the activity of sulfate reductase in SRB, N 2 O hinders the metabolic process of SRB, and NO is in a highly activated state, which is toxic to many ba...

specific Embodiment approach 2

[0024] Specific embodiment two: the difference between this embodiment and specific embodiment one is that the denitrifying bacterial fermentation liquid is one of the denitrifying bacteria Anoxynatronum, Aminivibrio, Comamonas, Azoarcus, Nitrospira, Helicobacteraceae, Comamonadaceae, Achromobacter and Thauera or mixed in any ratio and then fermented. Others are the same as the first embodiment.

[0025] Aminivibrio (Aminivibrio), Comamonas (Comamonas), Azoarcus (Azovibrio), Nitrospira (Nitrospira), Helicobacteraceae (Helicobacteraceae), Comamonadaceae (Comamonas ), Achromobacter (Achromobacter).

specific Embodiment approach 3

[0026] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is that the fermentation method of denitrifying bacteria is as follows: the activated denitrifying bacteria are transferred to the denitrifying bacteria tank for cultivation, and the Nitrogen control ensures an anoxic environment, the pH is adjusted at 7.5-8.0, the culture temperature is 28-32°C, and the fermentation time is 48 hours. Others are the same as those in Embodiment 1 or 2.

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Abstract

The invention discloses a biological inhibitor suitable for controlling polymer viscosity loss in virtue of an ecological regulation thought and a using method thereof. The invention aims to solve theproblem of polymer viscosity loss caused by sulfate reducing bacteria in an oil field injection allocation system. The biological inhibitor is composed of denitrifying bacterium fermentation liquor,nutrient elements and water. When in use, the biological inhibitor is pumped into oilfield produced water for polymer preparation, then polymer mother liquor is prepared, and a polymer is diluted andthen used for oilfield exploitation. The biological inhibitor provided by the invention can effectively inhibit sulfate reducing bacteria in an injection allocation system, and does not cause harm tobeneficial bacteria in an oil field system. The biological inhibitor is applied to the field of oilfield polymer flooding.

Description

technical field [0001] The invention relates to a biological inhibitor suitable for controlling the viscosity loss of polymers with the idea of ​​ecological regulation and its application method. Background technique [0002] In tertiary oil recovery, polymer flooding is an important technology for enhancing oil recovery. Polymer flooding is to formulate polymer into aqueous solution and inject it into oil layer for displacement. Among them, the viscosity of polymer is an important indicator of polymer flooding, and is the key to ensure oil recovery. However, during the process of polymer formulation and injection, it is inevitable to be affected by external factors, resulting in a decrease in polymer viscosity. [0003] Bacteria widely exist in polymer dispensing systems, and the bacteria that have the greatest influence on polymer viscosity are sulfate-reducing bacteria (SRB). At present, the commonly used sterilization methods in oil fields include physical and chemica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/035C09K8/588
CPCC09K8/035C09K8/588
Inventor 魏利张昕昕魏东欧阳嘉李春颖潘春波赵云发
Owner HUACHEN ENVIRONMENTAL PROTECTION ENERGY (GUANGZHOU) CO LTD
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