Microbial enhanced oil recovery and compositions therefor

Patent · Mon Jan 01 00:00:00 EST 1990

OSTI ID:867287

Bryant, Rebecca S ^[1]

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1. Bartlesville, OK

A method is provided for microbial enhanced oil recovery, wherein a combination of microorganisms is empirically formulated based on survivability under reservoir conditions and oil recovery efficiency, such that injection of the microbial combination may be made, in the presence of essentially only nutrient solution, directly into an injection well of an oil bearing reservoir having oil present at waterflood residual oil saturation concentration. The microbial combination is capable of displacing residual oil from reservoir rock, which oil may be recovered by waterflooding without causing plugging of the reservoir rock. Further, the microorganisms are capable of being transported through the pores of the reservoir rock between said injection well and associated production wells, during waterflooding, which results in a larger area of the reservoir being covered by the oil-mobilizing microorganisms.

• Research Organization: IIT Research Institute (Chicago, IL)
• DOE Contract Number: FC22-83FE60149
• Assignee: IIT Research Institute (Chicago, IL)
• Patent Number(s): US 4905761
• OSTI ID: 867287
• Country of Publication: United States
• Language: English

Related Subjects

microbial
enhanced
oil
recovery
compositions
method
provided
combination
microorganisms
empirically
formulated
based
survivability
reservoir
conditions
efficiency
injection
presence
essentially
nutrient
solution
directly
bearing
waterflood
residual
saturation
concentration
capable
displacing
rock
recovered
waterflooding
causing
plugging
transported
pores
associated
production
results
larger
covered
oil-mobilizing
recovery efficiency
oil bearing
oil recovery
enhanced oil
residual oil
reservoir rock
microbial enhanced
reservoir conditions
/166/435/