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Composite agent for changing metabolic mode of sulfate reducing bacteria and using method thereof

A compound agent and sulfate technology, which is applied in drilling compositions, chemical instruments and methods, and earth-moving drilling, etc., can solve the problems of unstable polymer viscosity and large loss, and reduce sulfide content and use. The effect of reducing the amount of viscosity loss

Active Publication Date: 2020-09-18
HUACHEN ENVIRONMENTAL PROTECTION ENERGY (GUANGZHOU) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the problem of unstable polymer viscosity and large loss during the process of polymer preparation and injection into the ground, and provides a compound agent for changing the metabolic mode of sulfate-reducing bacteria and its application method

Method used

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  • Composite agent for changing metabolic mode of sulfate reducing bacteria and using method thereof
  • Composite agent for changing metabolic mode of sulfate reducing bacteria and using method thereof
  • Composite agent for changing metabolic mode of sulfate reducing bacteria and using method thereof

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Experimental program
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specific Embodiment approach 1

[0013] Specific Embodiment 1: In this embodiment, a compound medicine for changing the metabolic mode of sulfate-reducing bacteria comprises 10-20 parts of nitrate substrate, 0.02 parts of urea and 0.1-0.5 parts of nutrients in parts by mass.

specific Embodiment approach 2

[0014] Embodiment 2: This embodiment is different from Embodiment 1 in that the nitrate substrate is sodium nitrate or potassium nitrate. Others are the same as the first embodiment.

specific Embodiment approach 3

[0015] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the nutrient element is carboxymethyl cellulose. Others are the same as those in Embodiment 1 or 2.

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Abstract

The invention discloses a composite agent for changing a metabolic mode of sulfate reducing bacteria and a using method thereof. In order to solve the problems of unstable polymer viscosity and a large loss in the process from polymer preparation to underground injection in the prior art, the composite agent is prepared from a nitrate substrate, urea, nutrient elements and water. The composite agent for changing the metabolic mode of the sulfate reducing bacteria is used for preparing a polymer mother liquor and diluting polymers, and then is used for oil exploitation. According to the invention, the sulfide content in the polymer solution is reduced, and the viscosity loss of the polymer in the process from preparation to underground injection is greatly reduced. The composite agent is suitable for an oil field ground system for preparing clear water and sewage or diluting polymers, and an oil field ground system with large polymer viscosity loss in the process from polymer preparation to polymer injection.

Description

technical field [0001] The invention relates to a compound medicine for changing the metabolic mode of sulfate-reducing bacteria and its application method. Background technique [0002] At present, third-generation oil recovery technologies such as polymer flooding and ASP flooding are widely used in domestic oil fields to enhance oil recovery. Because there are often various bacteria in the preparation and injection system, the growth of bacteria will cause the polymer to decompose and cause the viscosity loss of the polymer, which will affect the normal oil production, and will cause corrosion of pipelines and equipment, and increase the production cost. [0003] Microorganisms widely present in oilfield systems are mainly divided into three categories, namely sulfate-reducing bacteria, saprophytic bacteria and iron bacteria. Sulfate-reducing bacteria can survive in anaerobic and extreme environments, and can use refractory organic matter as a carbon source, such as petr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/582C09K8/588E21B43/22
CPCC09K8/582C09K8/588E21B43/16Y02A50/30
Inventor 魏利赵云发魏东李春颖张昕昕欧阳嘉潘春波
Owner HUACHEN ENVIRONMENTAL PROTECTION ENERGY (GUANGZHOU) CO LTD
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