1
Eugene Ostapovich, Farrokh N Pebdani: Method for enhanced oil recovery through a horizontal production well in a subsurface formation by in-situ combustion. Mobil Oil Corporation, Alexander J McKillop, George W Hager Jr, May 18, 1993: US05211230 (262 worldwide citation)

A horizontal production well is located in the lower portion of a heavy viscous oil-bearing reservoir. A vertical injection well is located in the upper portion of the reservoir. Oxygen-enriched gas is injected down the injector well and ignited in the upper portion of the reservoir to create a comb ...


2
Christopher Burcham, Robert E Fast, Anthony S Murer, Paul S Northrop: Oil recovery by enhanced imbitition in low permeability reservoirs. Mobil Oil Corporation, Alexander J McKillop, George W Hager Jr, Charles A Malone, May 2, 1995: US05411086 (196 worldwide citation)

A method for enhanced oil recovery from a low permeability diatomaceous reservoir by imbibition is described. In this method, oil is displaced from a single injection well, or series of injection wells into a single producer or series of producing wells by a combination of applied fluid pressure, pl ...


3
David R Parrish: Method for enhanced oil recovery. Standard Oil Company, Scott H Brown, Fred E Hook, August 17, 1982: US04344486 (131 worldwide citation)

Disclosed is a method and apparatus for the enhanced recovery of liquid hydrocarbons from underground formations, said method comprising recovering a mixture comprising carbon dioxide and contaminants comprising hydrocarbon, hydrogen sulfide, or mixtures thereof, from an underground formation; combu ...


4
Paul H Jones: Method for enhanced oil recovery by geopressured waterflood. P H Jones Hydrogeology, Fleit & Jacobson, March 16, 1982: US04319635 (120 worldwide citation)

The recovery of petroleum produced from an oil reservoir is enhanced by injecting water such as from a geopressured aquifer having a natural gas content at or near saturation at a temperature above 300.degree. F. into the oil reservoir at a flow rate sufficient to develop a back-pressure in the oil ...


5
Milton E Goodhart: Tertiary recovery method using inverted deviated holes. Hydril Company, Dodge Bush & Moseley, March 3, 1987: US04646836 (70 worldwide citation)

A method for enhanced oil recovery from a subsurface earth formation is disclosed. At least one essentially upward deviated hole from a vertical shaft in the formation is formed. An outer loop borehole is formed in proximity with the deviated hole. A heating fluid is injected from the surface to the ...


6
Paul S Northrop: Imbibition process using a horizontal well for oil production from low permeability reservoirs. Mobil Oil Corporation, Alexander J McKillop, George W Hager Jr, Charles A Malone, May 2, 1995: US05411094 (25 worldwide citation)

A method for enhanced oil recovery from a low permeability diatomaceous reservoir by imbibition is described. In this method, oil is displaced from the reservoir with a horizontal wellbore by a combination of applied fluid pressure, plus "enhanced imbibition." Enhanced imbibition is accomplished by ...


7
Arenas Eliana Milena, Dolle Norbert, Matsuura Tsuyoshi, Thompson Anthony Robert: Enhanced oil recovery with asynchronous cyclic variation of injection rates. Shell Internat Res Maatschhapp, March 19, 2003: GB2379685-A (17 worldwide citation)

A method for enhanced oil recovery (EOR) from an oil-bearing formation (8) involves cyclically varying fluid injection from different longitudinally spaced segments of a fluid injection well (1) into different regions (2, 3) of said formation. The fluid injection rates are cyclically and asynchronou ...


8
David R Watkins, Robert K Knight, Donald C Young, Leonard J Kalfayan: Treating fines-containing earthen formations. Union Oil Company of California, Dean Sandford, Gregory F Wirzbicki, Robert A Franks, October 29, 1985: US04549609 (15 worldwide citation)

Method for treating earthen formations which contain water-sensitive, finely divided particulate matter wherein there is injected into the formation steam or a mixture of steam and hot water containing an effective fines-stabilizing amount of a compound containing ammoniacal nitrogen selected from t ...


9
George G Bernard: Method for enhanced oil recovery in reservoirs containing dissolved divalent metal cations. Union Oil Co of California, Dean Sandford, Gregory F Wirzbicki, Gerald L Floyd, November 16, 1982: US04359093 (15 worldwide citation)

A method for the enhanced recovery of oil from subterranean reservoirs having connate water containing dissolved divalent metal cations wherein there is injected via an injection well a slug of an aqueous solution containing a water-soluble alkaline material and an aminopolycarboxylic acid or a salt ...


10
Joseph R Comberiati, Charles D Locke, Krishna I Kamath: Method for enhanced oil recovery. The United States of America represented by the United States Department of Energy, James E Denny, Stephen D Hamel, Earl L Larcher, September 30, 1980: US04224992 (11 worldwide citation)

The present invention is directed to an improved method for enhanced recovery of oil from relatively "cold" reservoirs by carbon dioxide flooding. In oil reservoirs at a temperature less than the critical temperature of 87.7.degree. F. and at a pore pressure greater than the saturation pressure of c ...