Plant-Based Nano Bactericide for Oilfield SRB Control
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Solution Overview
Problem
Existing methods for sterilizing sulfate reducing bacteria (SRB) in oilfields face reduced efficiency due to bacterial resistance, leading to increased bactericide dosages and environmental pollution, and can disrupt microbial balances when using multiple denitrifying bacteria species.
Innovation Solution
A plant-based nano corrosion inhibition bactericide is prepared by combining aloin liquid from aloe leaves with modified carbon nanotubes and imidazoline-ammonium-salt, which is applied in a sterilization tank with an ultrasonic device to adsorb and kill SRB efficiently, reducing the need for high bactericide doses and minimizing environmental impact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional bactericide is used for sterilization, then sterilization effect is achieved, but bacterial resistance develops and sterilization efficiency decreases
Solution Approach 1:
The patent combines carbon nanotubes with plant-based extracts (aloe vera, garlic, onion) to create a composite bactericide system. This composite approach enhances sterilization efficiency through synergistic effects while reducing the need for high dosages of single-agent bactericides, thereby addressing the contradiction between maintaining high sterilization efficiency and reducing bactericide dosage.
Solution Approach 2:
The patent modifies the physical and chemical parameters of the bactericide by incorporating nanomaterials (carbon nanotubes) with specific surface areas and aspect ratios. These parameter changes enhance the bactericide's effectiveness against SRB, allowing for reduced dosages while maintaining or improving sterilization efficiency.
2Reliability
If multiple denitrifying bacteria species are used for biological sterilization, then sterilization effect is achieved, but microbial species balance is disrupted
Solution Approach 1:
The patent extracts and utilizes specific active components from plant sources (aloin, garlic extract, onion extract) that have inherent bactericidal properties against SRB. This extraction approach targets the harmful bacteria directly with specific anti-SRB compounds, achieving sterilization without disrupting the broader microbial ecosystem, thus resolving the contradiction between sterilization effectiveness and microbial balance.
Solution Approach 2:
The patent employs plant-based extracts that can be easily degraded and naturally decomposed, avoiding the accumulation of persistent synthetic chemicals in the environment. The use of natural, biodegradable materials ensures that the sterilization process does not long-term disrupt microbial communities, addressing both sterilization effectiveness and ecological stability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The method achieves high sterilization efficiency with reduced bactericide usage, provides lasting protection, and has a low environmental footprint, while being cost-effective and suitable for large-scale oilfield applications.
Implementation Method 1
Mix the aloin liquid with imidazoline-ammonium-salt, add acetonitrile to facilitate their better dissolution, and then add modified carbon nanotube. Increase the temperature to 95° C., and stir and react for 12 hours, and filter after naturally cooling down to room temperature and get the carbon nanotube loaded with bactericide.
Implementation Method 2
an ultrasonic device is equipped in the sterilizing tank; the oilfield sewage is pumped into the sterilizing tank, and the ultrasonic device is turned on, so as to start the sterilizing progress.
Implementation Method 3
take the fresh aloe leaves for cleaning, disinfection and removing the edges and corners, and then conduct grinding and centrifugal filtration to get aloe juice
Implementation Method 4
Stir the carbon nanotube, hydroxyethyl methacrylate and acrylic acid to react for 4 h at a constant temperature of 80° C. and at a stirring speed of 160 rpm to get the carbon nanotube after fiber treatment, namely the modified carbon nanotube.
Data Source
AI summary
The present invention discloses a preparation method for the plant-based nano corrosion inhibition bactericide for oilfield, comprising the following steps: Step 1. Prepare the aloin liquid; Step 2. Stir the carbon nanotube, hydroxyethyl methacrylate and acrylic acid to react for 4 h at a constant temperature of 80° C. to get the carbon nanotube after fiber treatment, namely the modified carbon nanotube; Step 3. Mix the aloin liquid with imidazoline-ammonium-salt, add acetonitrile, and then add modified carbon nanotube, increase the temperature to 95° C. stir and react for 12 hours, and filter after naturally cooling down to room temperature and get the carbon nanotube loaded with bactericide; Step 4. Stir the carbon nanotube loaded with bactericide, diphenylmethane diisocyanate and polycaprolactone to react for 6 hours at a constant temperature of 95° C. and in the reaction process, continuously inject helium to get the target bactericide.