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| Number | Title | Issue Date |
| 7938183 | Method for enhancing heavy hydrocarbon recovery Amines or ammonia and amines may be used to enhance recovery of heavy hydrocarbons. The amines or ammonia and amines alone or with water, steam or an oil solvent are combined with the heavy hydrocarbons to promote the transport of the heavy hydrocarbons. The amines ... | 05/10/2011 |
| 7866389 | Process and apparatus for enhanced hydrocarbon recovery A method for recovering hydrocarbons from a reservoir includes separating air into a nitrogen-rich gas and an oxygen-rich gas, oxidizing a hydrocarbon fuel with at least part of the oxygen-rich gas to produce steam and a CO2-rich gas, injecting at least part of the ... | 01/11/2011 |
| 7712528 | Process for dispersing nanocatalysts into petroleum-bearing formations Embodiments include methods for recovering petroleum products from a formation containing heavy crude oil. In one embodiment, a method includes flowing a catalytic material containing the nanocatalyst into the formation containing the heavy crude oil and exposing th... | 05/11/2010 |
| 7363973 | Method and apparatus for stimulating heavy oil production A process for the recovery of hydrocarbons from a hydrocarbon bearing formation having an extraction chamber where the extraction chamber has an extraction surface. The process has the steps of heating a solvent, such as propane, and then placing the solvent into th... | 04/29/2008 |
| 7279017 | Method for converting heavy oil residuum to a useful fuel A method for enabling the use of heavy oil residuum by conversion to a useful product. The method, in one embodiment, involves the use of a heavy oil residuum which is substantially non flowable. The viscosity of the residuum is reduced by heat or a combination of h... | 10/09/2007 |
| 7147057 | Loop systems and methods of using the same for conveying and distributing thermal energy into a wellbore Systems and methods are provided for treating a wellbore using a loop system to heat oil in a subterranean formation contacted by the wellbore. The loop system comprises a loop that conveys a fluid (e.g., steam) down the wellbore via a injection conduit and returns ... | 12/12/2006 |
| 7137447 | Method and composition for enhanced hydrocarbons recovery A method of treating a hydrocarbon containing formation is described. The method may include providing a hydrocarbon recovery composition to the hydrocarbon containing formation. Hydrocarbons in the hydrocarbon containing formation may interact with the hydrocarbon ... | 11/21/2006 |
| 7055602 | Method and composition for enhanced hydrocarbons recovery A method of treating a hydrocarbon containing formation is described. The method may include providing a hydrocarbon recovery composition to the hydrocarbon containing formation. Hydrocarbons in the hydrocarbon containing formation may interact with the hydrocarbon ... | 06/06/2006 |
| 6883607 | Method and apparatus for stimulating heavy oil production A process for the recovery of hydrocarbons from a hydrocarbon bearing formation having an extraction chamber where the extraction chamber has an extraction surface. The process has the steps of heating a solvent, such as propane, and then placing the solvent into th... | 04/26/2005 |
| 6776234 | Recovery composition and method A method and composition are described for improving recovery of oil from an oil reservoir. The method includes adding an effective amount of a fatty acid alkyl ester oil recovery composition to an oil reservoir and recovering oil from the reservoir. The composition... | 08/17/2004 |
| 6708759 | Liquid addition to steam for enhancing recovery of cyclic steam stimulation or LASER-CSS LASER-CSS provides a method to improve cyclic steam-based thermal recovery methods for heavy oils and bitumen. A key improvement over prior art consists of mixing liquid hydrocarbons into the injected steam instead of injecting such hydrocarbon as a separate slug in... | 03/23/2004 |
| 6662872 | Combined steam and vapor extraction process (SAVEX) for in situ bitumen and heavy oil production Steam is injected into the reservoir, heats the reservoir to mobilize and recover at least a fraction of reservoir hydrocarbons, forming a steam chamber in the reservoir. The steam is continuously injected into the reservoir to mobilize and recover reserv... | 12/16/2003 |
| 6257334 | Steam-assisted gravity drainage heavy oil recovery process A pair of vertically spaced, parallel, co-extensive, horizontal injection and production wells and a laterally spaced, horizontal offset well are provided in a subterranean reservoir containing heavy oil. Fluid communication is established across the span... | 07/10/2001 |
| 6230814 | Process for enhancing hydrocarbon mobility using a steam additive A method for producing hydrocarbons from a subterranean formation comprises injecting steam and an additive into the formation. The additive has at least one nonaqueous fluid, which is selected so that the evaporation temperature of the additive is within... | 05/15/2001 |
| 5685371 | Hydrocarbon-assisted thermal recovery method A method of enhancing recovery of viscous petroleum is provided. A hydrocarbons mixture comprising hydrocarbons having a selected range of boiling points, all higher than that of water, is injected at relatively low concentrations along with steam. The ra... | 11/11/1997 |
| 5333687 | Long chain alcohol additives for surfactant foaming agents The invention is a method for increasing the effectiveness of steam or carbon dioxide foaming operations for improving conformance during steam or carbon dioxide floods by adding to the surfactant foaming solution an alcohol having about 8 to about 20 car... | 08/02/1994 |
| 5279367 | Fatty acid additives for surfactant foaming agents The invention is a method for increasing the effectiveness of steam or carbon dioxide foaming operations for improving conformance during steam or carbon dioxide floods by adding to the surfactant foaming solution a fatty acid having about 12 to about 20 ... | 01/18/1994 |
| 5092405 | Alkoxylated surfactant system for heavy oil reservoirs The invention is a method of recovering heavy oil from an underground reservoir by surfactant flooding which comprises injecting an aqueous surfactant solution comprising about 0.1% to about 5% by weight of an alkoxylated nonionic or ionic surfactant thro... | 03/03/1992 |
| 5071890 | Composition for selective placement of polymer gels for profile control in thermal oil recovery A composition for closing pores in a formation following a steam-flooding enhanced oil recovery process. The composition comprises an aqueous temperature activated gellable mixture. This mixture is comprised of water, water dispersible polymers, phenolic ... | 12/10/1991 |
| 4923009 | Steam enhanced oil recovery processes and compositions for use therein A composition for use in enhanced oil recovery procedures comprises steam having a vapor phase and a liquid phase and a fluorocarbon surfactant partitioned between the liquid and vapor phases. The partitioning of the fluorocarbon surfactant between the tw... | 05/08/1990 |
| 4693311 | Steam foam process A steam foam process for diverting steam within a subterranean reservoir and improving oil displacement is carried out by injecting into the reservoir a steam-foam-forming mixture comprising steam and a linear C25 -C30 --olefi... | 09/15/1987 |
| 4637466 | Method of improving conformance in steam floods with carboxylate steam foaming agents The disclosed invention is a group of steam foaming agents for injection with steam and a non-condensable gas to decrease permeability in steam swept zones and increase oil recovery. The foaming agents have the general formula: where R is an alkyl radical... | 01/20/1987 |
| 4607695 | High sweep efficiency steam drive oil recovery method In a steam flood oil recovery process wherein the oil-containing formation has a natural brine salinity concentration within the range of 10 to 20% by weight, sweep efficiency is improved by injecting steam until steam breakthrough occurs at the productio... | 08/26/1986 |
| 4580633 | Increasing the flow of fluids through a permeable formation Method for treating a formation, particularly one containing finely divided particulate material, to increase the flow of fluids through the formation wherein there is injected therein an organosilicon compound, preferably in a hydrocarbon carrier liquid,... | 04/08/1986 |
| 4549609 | Treating fines-containing earthen formations 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 c... | 10/29/1985 |
| 4540049 | Method of improving steam flood conformance with steam flooding agents without a non-condensable gas The disclosed invention is a group of novel steam foaming agents for injection with steam to decrease permeability in steam sept zones. They are effective without the coinjection on a non-condensable gas. The foaming agents have the general formula: where R is... | 09/10/1985 |
| 4444261 | High sweep efficiency steam drive oil recovery method The sweep efficiency of a steam drive process is improved and steam override reduced significantly if steam is injected into a formation until channeling has begun, after which steam injection is terminated and a slug of a thermally stable diverting fluid... | 04/24/1984 |
| 4393937 | Olefin sulfonate-improved steam foam drive A steam foam drive process for displacing oil within a subterranean reservoir is improved by injecting into the reservoir a steam-foam-forming mixture of steam, and an olefin sulfonate-containing surfactant component.... | 07/19/1983 |
| 4386658 | Solvent push-pull process for improving vertical conformance of steam drive process The vertical conformance of a steam drive process is improved and steam override reduced by utilizing a solvent push-pull process in the lower portion of the formation adjacent the production well. Steam is injected into the injection well with production... | 06/07/1983 |
| 4300634 | Foamable compositions and formations treatment Thermally stable foamable gelled compositions suitable for post-primary oil recovery e.g., steam- or gas-foamed systems comprising water, a surfactant, a polymeric viscosifier, an aldehyde component, and at least one phenolic component such as resorcinol,... | 11/17/1981 |
| 4191252 | Method for the recovery of oil Recovery of heavy oil involves injecting a solvent eg. toluene for the oil in admixture with either (i) a steam distillable surfactant eg.butylamine or (ii) a short lived surfactant eg. a petroleum sulphonate and then injecting steam.... | 03/04/1980 |
| 4187185 | Oil recovery process using oxyalkylated additives A process for recovering hydrocarbons from a subterranean hydrocarbon-bearing formation by injecting into the formation via an injection well an aqueous alkaline flooding medium such as water, steam, etc. containing a small amount of a sulfonated, oxyalky... | 02/05/1980 |
| 4166504 | High vertical conformance steam drive oil recovery method The vertical conformance of a steam drive process is improved and steam override reduced by penetrating the zone between one injection well and one producing well, with an infill well which is in fluid communication with the bottom half or less of the for... | 09/04/1979 |
| 4156463 | Viscous oil recovery method Disclosed is a thermal oil recovery method suitable for recovering viscous oil by injecting steam and an amine compound having the following formula: wherein R1 and R2 are each hydrogen or a C1 to C6 and preferably a... | 05/29/1979 |
| 4124073 | Method of using viscosity-stabilized aqueous solutions Thiourea functions as a solution viscosity stabilizer in aqueous compositions comprising thiourea, nonionic polymers such as polyalkylene oxides and anionic surfactants such as petroleum sulfonates. The aqueous compositions are useful in connection with f... | 11/07/1978 |
| 4086964 | Steam-channel-expanding steam foam drive In a viscous oil reservoir in which the stratification of the rock permeability is insufficient to confine steam within the most permeable strata, oil can be produced by forming and expanding a steam channel through which steam is flowed and oil is produc... | 05/02/1978 |
| 4085799 | Oil recovery process by in situ emulsification Petroleum may be recovered from subterranean, petroleum-containing formations by injecting into the formation an organic liquid having dispersed therein, an alkali metal in very fine, preferably colloidal size range, particular form. The organic liquid co... | 04/25/1978 |
| 3993133 | Selective plugging of formations with foam An improved process for decreasing the permeability of a subterranean oil-bearing formation which comprises injecting an aqueous surfactant solution containing a chemically crosslinkable, water-dispersible polymer which prevents the surfactant from foamin... | 11/23/1976 |
