Method for foam emplacement in gas flooding for enhanced oil recovery

Patent · Tue Aug 10 00:00:00 EDT 1993

OSTI ID:6062327

Shang, Chou

A method is described for generating foam by improving the sweep efficiency of gas and steam floods by reducing the permeability of higher permeability thief zones of an oil bearing subterranean reservoir having heterogeneous and/or fracture permeability and being penetrated by at least one well, said method comprising: (a) injecting a controlled quantity of a first foam-forming surfactant into an injector well of said reservoir having at least one of said higher permeability zones to presaturate said reservoir; and (b) co-injecting controlled quantities of a gas and a subsequent foam-forming surfactant into the same injector well of said reservoir so that a controlled amount of foam of a controlled quality is generated in said high permeability zones so that said permeability of said high permeability zones is reduced.

• Assignee: Chevron Research and Technology Co., San Francisco, CA (United States)
• Patent Number(s): US 5234054; A
• Application Number: PPN: US 7-758040
• OSTI ID: 6062327
• Resource Relation: Patent File Date: 12 Sep 1991
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
OIL WELLS
GAS INJECTION
PLUGGING
ENHANCED RECOVERY
FLUID INJECTION
FOAMS
GEOLOGIC FRACTURES
INJECTION WELLS
PERMEABILITY
PETROLEUM
PROCESS CONTROL
SURFACTANTS
SWEEP EFFICIENCY
SYNTHESIS
COLLOIDS
CONTROL
DISPERSIONS
ENERGY SOURCES
FOSSIL FUELS
FUELS
GEOLOGIC STRUCTURES
WELLS
020300* - Petroleum- Drilling & Production