Method of enhancing oil recovery
AssigneeStatoil ASA
InventorHans Kristian Kotlar
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Abstract
The invention provides a method of enhancing oil recovery from a subterranean hydrocarbon reservoir, said method comprising injecting into said reservoir through a matrix injection section of a well a microorganism capable of digesting oil, and recovering oil from an oil receiving section of a production well, where said injection section is in said production well or is in an injection well and is above or adjacent said oil receiving section, and wherein microorganism injection is preceded by another oil extraction enhancing procedure.
Claims11
A method of enhancing oil recovery from a subterranean hydrocarbon reservoir, said method comprising injecting into said reservoir through a matrix injection section of a well a microorganism capable of digesting oil, and recovering oil from an oil receiving section of a production well, where said injection section is in said production well or is in an injection well and is above or adjacent said oil receiving section, and wherein microorganism injection is preceded by another oil extraction enhancing procedure.
A microorganism mixture for hydrocarbon reservoir treatment, said mixture comprising microorganisms of at least two, preferably at least three, of the following species:
- Sphingomonas sp., Pseudomonas sp., Burholderia sp., Thermovirga lienii, Archaeoglobus fulgidus, Acinebacter venetianus, Thermosipho geolii and Symbiobacterium sp.
Dependencies are inferred from the claim text.