Wells – Processes – Using microorganisms
Patent
1988-07-29
1990-03-06
Suchfield, George A.
Wells
Processes
Using microorganisms
166273, 166274, 435 42, 4352524, E21B 4322
Patent
active
049057618
ABSTRACT:
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.
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patent: 3185216 (1965-05-01), Hitzman
patent: 4475590 (1984-10-01), Brown
patent: 4522261 (1985-06-01), McInerney et al.
patent: 4610302 (1986-09-01), Clark
IIT Research Institute
Suchfield George A.
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