Control of micro-organisms during completion of hydraulically fractured wells is a significant component in successful development of a production system. Detrimental bacteria—“bad bugs”—such as sulfate-reducing bacteria (SRB) introduced into the reservoir during drilling or completion, can facilitate biogenic sulfide production, resulting in souring of production fluids and gas, iron sulfide f...

Microbial sulfate reduction in oil reservoirs (biosouring) is often associated with secondary oil production where seawater containing high sulfate concentrations (~28 mM) is injected into a reservoir to maintain pressure and displace oil. The sulfide generated from biosouring can cause corrosion of infrastructure, health exposure risks, and higher production costs. Isotope monitoring is a prom...

Humans naturally dispose of objects that disgust them. Is this phenomenon so deeply embedded that even incidental disgust – i.e., where the source of disgust is unrelated to a possessed object – triggers disposal? Two experiments were designed to answer this question. Two film clips served as disgust and neutral primes; the objects were routine commodities (boxes of office supplies). Results re...

Microbial communities in shale oil fields are still poorly known. We obtained samples of injection, produced and facility waters from a Bakken shale oil field in Saskatchewan, Canada with a resident temperature of 60°C. The injection water had a lower salinity (0.7 Meq of NaCl) than produced or facility waters (0.6-3.6 Meq of NaCl). Salinities of the latter decreased with time, likely due to in...

crude glycerol (cg) is an abundantly available and cheap by-product from biodiesel production. value-added applications for cg are highly wanted by industry and several processes such as the use of cg for enhanced oil recovery have been proposed. the aim of this study was to evaluate the sulfide production of sulfate-reducing bacteria (srb) indigenous to oil reservoirs using cg as substrate. th...

The injection of seawater into a hydrocarbon reservoir (seawater flooding) as secondary or tertiary oil recovery method is associated with two possibly significant challenges. First, the formation and deposition various types scale may happen due to incompatibility between brine. Especially, addition sulfate ions trigger scales (e.g., barium sulfate, strontium calcium sulfate). Second, microbia...