Biotechnology. Technician using an anaerobic tent to culture anaerobic bacteria,during research into microbially-enhanced oil recovery methods. Researchers hope to breed strains of chemical- producing bacteria,which can survive in the high temperature,high pressure,oxygen-free environ- ment of an oil reservoir. Several different bacterial chemicals are envisaged: surfactants & solvents to lower oil viscosity; viscous polymers to block porous "thief zones" where oil is lost; fermentation gases to clear blocked wells & soluble polymers to thicken the water pumped into a reservoir,making it more effective at sweeping the oil towards a production well | |
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Credit: | Science Photo Library / Mason, Jerry |
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