1
Nizar F Djabbarah: Sweep improvement in enhanced oil recovery. Cities Service Co, George L Rushton, William N Patrick, John W Carpenter, November 3, 1987: US04703797 (39 worldwide citation)

A method for sweep improvement during enhanced oil recovery in a subterranean oil-bearing formation concerns the generation of foam by the dispersion of the displacing fluid in an aqueous solution of a mixed surfactant system. The mixed surfactant system comprises a lignosulfonate foaming agent and ...


2
Eve S Sprunt, Nizar F Djabbarah: Method including electrical self potential measurements for detecting multiphase flow in a cased hole. Mobil Oil Corporation, A J McKillop, G W Hager, C A Malone, May 25, 1993: US05214384 (34 worldwide citation)

A method for time lapse electric logging in a cased hole in which electrodes are implanted in the casing or the hole is completed with a gravel packed non conductive, perforated liner that allows an open hole logging tool to be used for time-lapse logging. Thereafter, the implemented electrodes or a ...


3
Nizar F Djabbarah, Ralph V Garling, David T Hand, Jennifer Macfadyen: Foam mixture for steam and carbon dioxide drive oil recovery method. Mobil Oil Corporation, Alexander J McKillop, Dennis P Santini, Lawrence O Miller, May 7, 1996: US05513705 (21 worldwide citation)

The invention is a foam method for improving conformance during a steam flood or carbon dioxide flood in a subterranean, oil-containing formation penetrated by at least one injection well and at least one production well. In a steam flood oil recovery process, sweep efficiency is improved by injecti ...


4
Nizar F Djabbarah: Oil recovery method employing carbon dioxide flooding with improved sweep efficiency. Mobil Oil Corporation, Alexander J McKillop, Michael G Gilman, Stanislaus Aksman, August 12, 1986: US04605066 (12 worldwide citation)

Oil is recovered from oil-containing formations employing alternate injection of carbon dioxide and a mixture of carbon dioxide and an additive comprising an intermediate hydrocarbon or tall oil to improve sweep efficiency. First, carbon dioxide is injected and fluid including oil is recovered from ...


5
Nizar F Djabbarah, Ralph V Garling: Foam mixture for steam and carbon dioxide drive oil recovery method. Mobil Oil Corporation, Alexander J McKillop, George W Hager Jr, Lawrence O Miller, March 22, 1994: US05295540 (12 worldwide citation)

The invention is a foam method for improving conformance during a steam flood or carbon dioxide flood in a subterranean, oil-containing formation penetrated by at least one injection well and at least one production well. In a steam flood oil recovery process, sweep efficiency is improved by injecti ...


6
Eve S Sprunt, Nizar F Djabbarah: Method for determining oil and water saturation of core samples at overburden pressure. Mobil Oil Corporation, Alexander J McKillop, George W Hager Jr, Lawrence O Miller, April 5, 1994: US05299453 (10 worldwide citation)

A method and apparatus is provided to determine the amount of oil and water or brine in a representative core sample of reservoir rock at an overburden stress which approximates reservoir stress conditions. The core sample is initially saturated with reservoir hydrocarbon (crude oil) and aqueous flu ...


7
Nizar F Djabbarah: Miscible oil recovery process using carbon dioxide and alcohol. Mobil Oil Corporation, Alexander J McKillop, Charles J Speciale, Charles A Malone, February 13, 1990: US04899817 (9 worldwide citation)

A process for modifying the minimum miscibility pressure (MMP) of a drive fluid and hydrocarbonaceous fluid mixture by addition of alcohol to the drive fluid. Alcohols which can be utilized include methanol through octanol. The preferred drive fluid comprises carbon dioxide. Selection of the alcohol ...


8
Nizar F Djabbarah, Ralph V Garling, David T Hand, Jennifer Macfadyen: Foam mixture for carbon dioxide drive oil recovery method. Mobil Oil Corporation, Ronald A Bleeker, Malcolm D Keen, Lawrence O Miller, August 6, 1996: US05542474 (9 worldwide citation)

The invention is a foam method for improving conformance during a steam flood or carbon dioxide flood in a subterranean, oil-containing formation penetrated by at least one injection well and at least one production well. In a steam flood oil recovery process, sweep efficiency is improved by injecti ...


9
Nizar F Djabbarah, Eve S Sprunt: Method for determining steam quality using a foaming surfactant. Mobil Oil Corporation, Alexander J McKillop, Lawrence O Miller, November 28, 1995: US05470749 (4 worldwide citation)

Steam quality is measured by mixing the steam with a small amount of surfactant to convert the steam to a stable foam, passing the stable foam through a capillary tube to determine foam quality (volume of vapor per volume of vapor and liquid) by measuring the streaming potential coupling coefficient ...


10
Nizar F Djabbarah: Enhanced oil recovery from low permeability reservoirs using organosilicone surfactants. Mobil Oil, Alexander J McKillop, George W Hager Jr, Charles A Malone, July 5, 1994: US05325920 (4 worldwide citation)

A method for enhanced oil recovery in a reservoir having a substantial silicon content where an organosilicone surfactant is co-injected with steam to generate a foam. The organosilicone surfactant component of the foam prevents a dissolution of the silicon-containing formation since local equilibri ...