... Abstract When oil is produced by water injection sulfide formation (souring) can be stimulated. Souring is often caused by sulfatereducing bacteria (SRB), which oxidize organic carbon (oil organics) with sulfate in the injection water to CO 2 and sulfide. As a result H2S concentrations...

... with the use of these sulphide-laden streams dictate the removal of sulphide prior to their use. Treatment of the contaminated streams can be achieved by physicochemical methods or through biological processes relying on the catalytic activity of sulphide-oxidizing bacteria. Compared with the conventional...

... electron acceptors and microbial nutrient for targeted denitrifying bacteria (DNB). The environmentally safe inorganic salt formulae complement the naturally occurring water-soluble volatile fatty acids (VFA) in the reservoir and produced waters, and selectively stimulate and increase the DNB populations...

... Abstract The activity of sulfate-reducing bacteria (SRB) in oil field brines causes numerous problems associated with reservoir souring. Biological solutions based on stimulating nitratereducing bacteria provide novel, inexpensive, and environmentally friendly alternatives to the use...

... Abstract The application of nitrate or nitrite to remediate souring during waterflooding is proven technology with the objective of (i) removing sulfide produced by sulfatereducing bacteria (SRB) and (ii) inhibiting further sulfide production by the SRB. Nitrate or nitrite injection stimulates...

... Abstract Nitrate-and nitrite-mediated containment of souring was studied in continuous up-flow packed-bed bioreactors. Produced water of the Coleville oil field in Saskatchewan, Canada, was used as an inoculum for establishing biofilms of sulfate-reducing bacteria (SRB). With a medium...

... sulfide (pyrite), calcium carbonate, calcium sulfate, clays, formation fines, oil and bacteria. Sulfate reducing bacteria (S.R.B.) reduce injection water sulfate ions to sulfur ions. As a result, hydrogen sulfide (H 2 S) is produced and water corrosivity is increased. (3) . Sour corrosion allows...

...) Surface water sources (lakes, rivers, ocean, etc.) Shallow groundwater (potable) Deeper 'wet' formations which act as water sources injection fluid water quality injectivity cation water source injection well bacteria pore system waterflooding particle permeability reduction...