Water injection and production systems

As explained above, the injection system is responsible for pumping water into the formation for the purpose of forcing the oil and gas out of the formation and into the production wells. The production system is responsible for separating the produced fluids into their respective components of oil, water, and gas. Biocides are used on both sides of an oilfield in an effort to control  

Microbiologically Influenced Corrosion (MIC) of the injection and production system. 

Hydrogen sulfide production due to sulfate-reducing bacteria growth and proliferation. 

Control of MIC. Microorganisms in the injection water and produced water may have the opportunity to attach to metal surfaces in regions of low flow rates. If allowed to form biofilms, the microorganisms could contribute to microbiologically influenced corrosion (MIC) of the injection system. MIC events in the injection system can lead to corrosion failures of pipelines and pumps, with the related problems of equipment downtime, lost production and environmental hazards caused by spills or releases. It is safe to say that the overwhelming purpose of using biocides in the oilfield is to control MIC. 

Biocides for injection systems. The most commonly used biocides in injection systems include glutaraldehyde, THPS, quaternary ammonium compounds, acrolein, and formaldehyde. These biocides may be used alone, or in eombination with each other. Blends containing glutaraldehyde, quaternary ammonium compounds, both 

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