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7621326 |
Petroleum extraction from hydrocarbon formations
Recovery of viscous hydrocarbon by hot fluid injection from subterranean formations is assisted by using a specially designed and under-reamed vertical well to form a central production cavity;...
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6679326 |
Pro-ecological mining system
The invention comprises a high pressure fluid barrier forming an enclosure boundary with respect to overburden and floor strata separated by one or more production strata containing desirable...
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5358054 |
Method and apparatus for controlling steam breakthrough in a well
A method and apparatus for controlling the intrusion of steam (e.g. breakthrough) from a zone of a producing formation into a slotted liner of a gravel-packed, production well of a steam flood...
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5325920 |
Enhanced oil recovery from low permeability reservoirs using organosilicone surfactants
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...
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5174377 |
Method for optimizing steamflood performance
Disclosed is an invention for optimizing recovery of petroleum from a subterranean, petroleum containing formation by improving the efficiency of a steam drive through a linear heat reduction...
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5042583 |
Steam foam drive method for enhanced oil recovery
A process for the recovery of oil from a petroleum reservoir by improving steam sweep efficiency during steam-flooding, wherein a foaming agent is added to divert steam to unswept zones and the...
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5022466 |
Method for steam flooding profile control
A method for minimizing well recompletions in a multiple zone hydrocarbonaceous fluid containing formation. A steam flooding enhanced oil recovery (EOR) is conducted in the upper zone of said...
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4845134 |
Gelable compositions and use thereof in steam treatment of wells
A gelable composition is provided which can be injected into a well prior to steam treatment of the well. The composition comprises water, a water-dispersible polymer, a water-dispersible first...
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4819725 |
Recovering oil bypassed by a steam override zone
The invention is a method of recovering oil bypassed by a steam override zone. First, the production well is drilled below the oil producing zone into an underlying interval. The well perforations...
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4787452 |
Disposal of produced formation fines during oil recovery
Recovered formation fines are pumped in slurry form into an injection well during an enhanced oil recovery process e.g. a steam flood. Said injection can be done incrementally in stages in...
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4702317 |
Steam foam floods with a caustic agent
Disclosed is a process of adding a caustic material to a steam foam composed of steam, foaming agent and a non-condensible gas to increase the resistance and lifetime of a steam foam, said caustic...
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4665986 |
Gel and method for reducing steam channeling
A gel-forming composition is provided comprising a PVA based substance selected from the group consisting of a polyvinyl alcohol, a polyvinyl alcohol copolymer, and mixtures thereof, an aldehyde...
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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...
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4627439 |
Prebent ventricular/atrial cardiac pacing lead
A lead for effecting either or both of ventricular or atrial cardiac pacing and an assembly method are provided. The lead has a portion that is molded with a prebent condition which enables the...
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4620594 |
Vertical conformance steam drive oil recovery method
The condition known as steam override is overcome by the use of a blocking agent to obstruct fluid flow in part of the override region combined with the closing of all passages of egress for...
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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...
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4540050 |
Method of improving conformance in steam floods with 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...
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4456066 |
Visbreaking-enhanced thermal recovery method utilizing high temperature steam
The displacement efficiency of a steam drive process is improved and steam override reduced by rapidly injecting a predetermined amount of high temperature steam via an injection well into the...
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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....
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4177752 |
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 injector and one producer, with an infill well which is in fluid...
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4175618 |
High vertical and horizontal conformance thermal oil recovery process
Thermal oil recovery processes employing the injection of steam and/or hot water for mobilizing viscous petroleum sweep only a small fraction of the formation between the wells because of override,...
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4166501 |
High vertical conformance steam drive oil recovery method
The vertical or both vertical and horizontal conformance of a steam drive process is improved and steam override reduced by penetrating the zone between one injector and one producer, with one or...
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4166503 |
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 recovery zone between one injection well and one producing well, with at least one infill...
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4068717 |
Producing heavy oil from tar sands
A method is provided for recovering heavy oil from an underground tar sand reservoir by injecting steam into an injection well penetrating the reservoir sufficiently to fracture the tar sand and...
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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,...
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3795278 |
DOWN-DIP STEAM INJECTION FOR OIL RECOVERY
In a dipping reservoir which has an active aquifer located down-dip, oil is recovered by injecting a slug of steam only slightly updip from the original oil-water contact in the reservoir while...
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3550685 |
SHALE OIL PRODUCTION
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3477510 |
ALTERNATE STEAM-COLD WATER INJECTION FOR THE RECOVERY OF VISCOUS CRUDE
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