1
Redford David Arthur: Method for establishing communication path in viscous petroleum-containing formations including tar sand deposits for use in oil recovery operations. Texaco Exploration Canada, Whaley Thomas H, Ries Carl G, Park Jack H, September 30, 1975: US3908762 (52 worldwide citation)

Many oil recovery techniques for viscous oil recovery such as recovery of bitumen from tar sand deposits, including steam injection and in situ combustion, require establishment of a high permeability interwell fluid flow path in the formation. The method of the present invention comprises forming a ...


2
Redford David Arthur, Allen Joseph Columbus: Method for recovering petroleum from viscous petroleum containing formations including tar sands. Texaco Exploration Canada, Texaco, Whaley T H, Ries C G, October 1, 1974: US3838738 (50 worldwide citation)

Petroleum may be recovered from viscous petroleum containing formations including tar sand deposits by first creating a fluid communication path low in the formation, followed by injecting a heated fluid, aqueous or nonaqueous, into the fluid communication path, followed by injecting a volatile solv ...


3
Allen Joseph Columbus, Redford David Arthur: Method for establishing communication path in viscous petroleum-containing formations including tar sands for oil recovery operations. Texaco, Texaco Exploration Canada, Whaley T H, Ries C G, Park Jack H, October 21, 1975: US3913672 (21 worldwide citation)

Many oil recovery techniques for viscous oil recovery including steam injection and in situ combustion require establishment of a high permeability fluid flow path in the formation. The method of the present invention comprises forming an initial entry zone into the formation by means such as hydrau ...


4
Redford David Arthur: Process for developing interwell communication in a tar sand. Canadian Fina Oil, December 19, 1972: US3706341 (18 worldwide citation)

A hot, competent, permeable communications zone, connecting injection and production wells completed in a tar sand, is developed as follows: A cold, aqueous solution containing sodium hydroxide and a non-ionic surfactant is injected into a propped fracture system connecting the wells. The solution i ...


5
Redford David Arthur, Allen Joseph Columbus: Recovery of petroleum from viscous petroleum containing formations including tar sand deposits. Texaco, Texaco Exploration Canada, Whaley T H, Ries C G, Park Jack H, October 21, 1975: US3913671 (16 worldwide citation)

Recovery of viscous petroleum is enhanced by contacting viscous petroleum in the formation near the production well which is restricting flow into the well with an aqueous heating fluid such as steam or hot water. Introduction of the aqueous treating fluid on a continuous or intermittent basis is ac ...


6
Redford David Arthur: Process for developing interwell communication in a tar sand. Petrofina Canada, Johnson Ernest Peter, July 23, 1974: US3825066 (6 worldwide citation)

Bituminous sand is contacted with ozone to render the bitumen partly water soluble and to create surface active agents in situ which promote oil-in-water emulsification and increase the water wetability of the sand. Bitumen can then be removed and recovered from the sand formation by flushing it wit ...


7
Redford David Arthur: Method for extracting bitumen from tar sands. Canadian Fina Oil, August 29, 1972: US3687197 (4 worldwide citation)

Hot caustic solution is injected into an unconsolidated silty lens extending through the Athabasca bitumen reservoir between injection and production wells. Over a period of time part of the lens is rendered movable. The mud is forced to the production well and removed therefrom, leaving a steam-per ...


8
Redford David Arthur: Dense solvent demulsification method for bituminous petroleum-water emulsions. Texaco Exploration Canada, Whaley T H, Ries C G, April 15, 1975: US3878090 (3 worldwide citation)

Resolving or breaking oil field emulsions involving bituminous petroleum is more difficult than emulsions involving conventional petroleum because the specific gravity of bituminous petroleum is approximately equal to the specific gravity of water. Demulsification of bituminous petroleum emulsions i ...