Microbial-control actives for oilfield water systems u2014 glutaraldehyde, THPS, and DBNPA u2014 used to manage sulfate-reducing bacteria, biofilm, and microbiologically influenced corrosion.
Oilfield biocides are non-oxidizing antimicrobial actives dosed into water-bearingnsystems to control bacterial populations u2014 chiefly sulfate-reducing bacteria (SRB) u2014 that drivenreservoir souring and microbiologically influenced corrosion (MIC). They are appliednacross produced water, injection water, fracturing fluid, and storage rather than to thenhydrocarbon phase. Program design pairs an active with a dose and contact time matched to thensystem's bacterial load and temperature.
nnGlutaraldehyde is the broad-spectrum workhorse for batch and continuous treatment, and THPSnis the common choice where sulfide is present because it also helps disperse iron-sulfidendeposits. The genuine trade-off is system chemistry: glutaraldehyde performance drops innsulfide-rich and high-pH water, while THPS is more sensitive to oxygen and strong oxidizers.nWhere a system swings between sour and aerated conditions, operators often alternate activesnrather than rely on one.
nnDBNPA acts quickly and then hydrolyzes, which suits short-contact applications and fracturingnsystems where a low-persistence active is preferred. Because all three are registerednantimicrobial actives, their sale and use are governed by EPA FIFRA registration in the UnitednStates and the EU Biocidal Products Regulation in Europe. Confirm the registered uses andnapproved dose rates for your application and jurisdiction before specifying a product.
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