Ecological regulating and controlling method for sulfate reducing bacteria liveness in surface water of oil field, and used restrainer thereof

A surface water and sulfate technology, applied in plant growth regulators, biocides, chemical instruments and methods, etc., can solve the problems of low sterilization efficiency, fungicides, etc., achieve wide coverage, low cost, and increase redox potential Effect

Inactive Publication Date: 2008-12-03
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This technology helps prevent harm caused from acid rain or other factors affecting soil quality. By removing nitrogen compounds like ammonium (NH4) salts during production processes, this method can increase the amount of available oxygen needed without adding more chemical agents into contaminated areas. Additionally, it prevents excessive growth of microorganisms called Sulfur Microbial Reducers (SMR), which causes damage when used on crops such as wheat. Overall, these technical improvements improve environmental safety while minimizing negative impact on human health.

Problems solved by technology

This patented technical solution described in this patents relates to controlling SRB during oil field operations without affecting their beneficial effects. Current treatments involve physically removing them from the affected areas through filtrations systems like sand filters, but they also pose environmental concerns. Chemotherapy techniques may help kill certain types of organism called SRB while others work better against these same strains. Physicochemical sterilizers use powerful substances to remove unwanted materials, making it challenging to maintain clean pipelines. Biological agents offer an alternative approach to address issues associated with chemistry sterilizations.

Method used

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specific Embodiment approach 1

[0008] Specific embodiment 1: In this embodiment, the inhibitor of sulfate-reducing bacteria activity in surface water in the oil field consists of 10-20 parts of denitrifying and nitrifying bacteria liquid, 0.01-0.08 parts of nutrient elements and 0.01-0.05 parts of synergistic Inhibitory substances; the denitrifying bacteria are Bacillus sp, Denitrifyingbacteria, Pseudomonas aeruginosa, Rhizobium sp, Thermomonas sp and Acidovoraxsp; the concentration of bacteria in the denitrifying and nitrifying bacteria liquid is 10 5 ~10 9 Individual / mL; the nutrient element is sodium nitrate, potassium nitrate or sodium nitrite; the synergistic inhibitory substance is ammonium molybdate, sodium molybdate or copper nitrate.

[0009] The role of nutrients in this embodiment is to provide nutrition for denitrifying bacteria, stimulate the growth of denitrifying bacteria and increase the redox potential of oilfield surface water; the role of synergistic inhibitory substances is to specifical...

specific Embodiment approach 2

[0010] Specific embodiment two: what this embodiment is different from specific embodiment one is that the inhibitor of sulfate-reducing bacteria activity in oilfield surface water is by mass fraction ratio by 15 parts of denitrifying and nitrifying bacteria liquids, 0.05 parts of nutrient elements and 0.03 parts made of synergistic inhibitory substances; the denitrifying bacteria are Bacillus sp, Denitrifying bacteria, Pseudomonas aeruginosa, Rhizobium sp, Thermomonas sp and Acidovorax sp; the concentration of bacteria in the denitrifying and nitrifying bacteria liquid is 10 7 Individual / mL; the nutrient element is sodium nitrate, potassium nitrate or sodium nitrite; the synergistic inhibitory substance is ammonium molybdate, sodium molybdate or copper nitrate. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0011] Specific embodiment three: the ecological regulation and control method of sulfate-reducing bacteria activity in the oil field surface water of the present embodiment is carried out according to the following steps: one, preparation inhibitor: Bacillus sp, Denitrifying bacteria, Pseudomonas aeruginosa, Rhizobium sp, Thermomonas sp and Acidovorax sp six A kind of denitrification and nitrification bacteria mixed expansion culture, the concentration of bacteria was 10 5 ~10 9 1 / mL denitrifying and nitrifying bacteria liquid, and then mix 10 to 20 parts of denitrifying and nitrifying bacteria liquid, 0.01 to 0.08 parts of nutrient elements and 0.01 to 0.05 parts of synergistic inhibitory substances according to the ratio of parts by mass to obtain an inhibitor; 2. According to the SO in oilfield surface water 4 2- Inhibitors are added at a molar ratio of 1:0.8-6 to nitrate; wherein the culture medium used in the mixed expansion culture of denitrifying and nitrifying bacte...

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Abstract

A method for the ecological regulation and control of the activity of aquatic sulfate reducing bacteria on oil field ground and a depressor used relate to a method for regulating and controlling the activity of sulfate reducing bacteria and a depressor used. The method solves the problems of the prior method for controlling SRB in an oil field including low sterilization efficiency and various disadvantages of bactericide. The depressor for inhibiting the activity of aquatic sulfate reducing bacteria on oil field ground is made from a denitrifying nitrifying bacteria liquid, nutritive element and a co-inhibiting substance in portion by mass. The method for the ecological regulation and control comprises the following steps that: (1) the depressor is prepared; and (2) the depressor is added according to the molar ratio between SO4<2-> and nitrate radical. The depressor has high efficiency in inhibiting sulfate reducing bacteria and avoids using a bactericide, thereby having high safety and environmental protection.

Description

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Claims

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Application Information

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Owner HARBIN INST OF TECH
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