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7543638 |
Low temperature oxidation for enhanced oil recovery
Methods and systems for enhancing oil recovery are disclosed. A method for enhancing oil recovery in a formation includes placing a catalyst in a wellbore; and introducing an oxidizing agent into...
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7520325 |
Enhanced hydrocarbon recovery by in situ combustion of oil sand formations
The present invention is a method and apparatus for the enhanced recovery of petroleum fluids from the subsurface by in situ combustion of the hydrocarbon deposit, from injection of an oxygen rich...
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7431090 |
Methods and apparatus for multiple fracturing of subterranean formations
The invention relates to methods and apparatus for creating multiple fractures in subterranean formations. The apparatus is a jetting tool having a plurality of sets of jetting nozzles so that the...
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7431083 |
Sub-surface coalbed methane well enhancement through rapid oxidation
A method of stimulating production of coalbed methane involves providing a perforation charge comprising a standard charge portion and a charge additive able to produce localized temporary...
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7051809 |
Burn assisted fracturing of underground coal bed
A method for fracturing subterranean coal formations by injecting air into the formation, igniting the coal, driving the fire away from the wellbore by injecting a cooling media into the burning...
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7048051 |
Recovery of products from oil shale
A process and system for recovering hydrocarbonaceous products from in situ oil shale formations. A hole is drilled in the oil shale formation and a processing gas inlet conduit is positioned...
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7025139 |
Method and operation of a well jet device inkwell testing and development and the well jet device for carrying out said method
The invention relates to jet device used for extracting oil from wells. The inventive method consists in the following: a pump, a connecting and disconnecting unit, a valve unit, a packer and a...
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6880635 |
In situ production of synthesis gas from a coal formation, the synthesis gas having a selected H2 to CO ratio
A coal formation may be treated using an in situ thermal process. A mixture of hydrocarbons, H 2 , and/or other formation fluids may be produced from the formation. Heat may be applied to the...
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6732796 |
In situ production of synthesis gas from a hydrocarbon containing formation, the synthesis gas having a selected H2 to CO ratio
A hydrocarbon containing formation may be treated using an in situ thermal process. A mixture of hydrocarbons, H 2 , and/or other formation fluids may be produced from the formation. Heat may be...
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6460619 |
Method and apparatus for creation and isolation of multiple fracture zones in an earth formation
Following fracturing operations in a first zone of a well bore traversing an earth formation, a sealing assembly is lowered into the well bore to isolate the first zone from the remainder of the...
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6328104 |
Upgrading and recovery of heavy crude oils and natural bitumens by in situ hydrovisbreaking
A process is disclosed for the in situ conversion and recovery of heavy crude oils and natural bitumens from subsurface formations using either a continuous operation with one or more vertical...
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6016867 |
Upgrading and recovery of heavy crude oils and natural bitumens by in situ hydrovisbreaking
A process is disclosed for the in situ conversion and recovery of heavy crude oils and natural bitumens from subsurface formations using either a continuous operation with one or more injection and...
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5452763 |
Method and apparatus for generating gas in a drilled borehole
The present apparatus and method utilizes a downhole electrolysis process implemented by means of an elongated gas generating apparatus containing an array of cascaded electrolysis cells...
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5402846 |
Unique method of hydraulic fracturing
An improved method for hydraulically fracturing a formation or reservoir where a thermo-setting gellable mixture is utilized. This thermo-setting mixture is foamed either at the surface or in situ...
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5360068 |
Formation fracturing
An oxygenated foam is injected into a hydrocarbon-bearing reservoir within a diatomite-containing subsurface formation to hydraulically form a fracture within the reservoir. Combustion is initiated...
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5024487 |
Method of creating an underground batch retort complex
Complexes of underground batch retorts, designed to duplicate surface retort prototypes proven successful in use, which may extend for miles on branch drifts intersecting central main drifts above...
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4966416 |
Fragmentation of an underground ore body
The invention provides a process for converting subterraneous ore overlain by an adjacent formation of porous rock into an enclosed zone of fragmented ore by first blasting a void space in the...
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4895206 |
Pulsed in situ exothermic shock wave and retorting process for hydrocarbon recovery and detoxification of selected wastes
An active combustion zone is established in situ within a permeable hydrocarbon formation. The permeable formation is periodically charged with a combustible gas, and is thereafter subjected to a...
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4787449 |
Oil recovery process in subterranean formations
Oil recovery from a subterranean, oil-containing formation having relatively highly permeable and/or fractured zones and relatively low permeability zones is improved by first injecting a...
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4718489 |
Pressure-up/blowdown combustion - a channelled reservoir recovery process
A cyclic process is described for recovering heavy oil from a reservoir having a network of generally linear, narrow permeable communication channels interconnecting outlying producing wells with...
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4676313 |
Controlled reservoir production
This invention contemplates a method of enhancing oil and/or gas recovery by properly drilling injection and production wells into a reservoir, incorporating flow control valves and sensors in both...
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4662439 |
Method of underground conversion of coal
A method of converting coal and other solid carbonaceous material to gaseous and liquid products by heating the coal in the presence of the gaseous effluent to a sufficient temperature for...
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4648450 |
Method of producing synthesis gas by underground gasification of coal using specific well configuration
Underground coal gasification process containing a novel system of injection and production wells. Specifically, the injection well is positioned at an angle with respect to horizontal of less than...
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4648456 |
Method for acidizing siliceous formations
A method for improving the permeability in a subterranean formation by acid treatment is disclosed. In this method, an aqueous acidizing solution containing hydrofluoric acid and excess fluoride is...
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4637464 |
In situ retorting of oil shale with pulsed water purge
Product yield and quality is increased during in situ retorting of oil shale by pulsed combustion in which the flow of feed gas to the flame front is intermittently stopped while continuously...
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4610303 |
Method of underground gasification of a series of gently dipping and inclined coal seams
A method of underground gasification of a series of gently dipping and inclined coal seams comprises the steps of determining the depth of occurrence and the thickness of each coal seam in said...
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4595056 |
Method for fully retorting an in situ oil shale retort
A method is provided for operating an in situ oil shale retort in a subterranean formation containing oil shale. The retort contains a fragmented permeable mass of formation particles containing...
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4585063 |
Oil shale retorting and retort water purification process
An oil shale process is provided to retort oil shale and purify oil shale retort water. In the process, raw oil shale is retorted in an in situ underground retort or in an above ground retort to...
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4573531 |
Method of underground gasification of coal seam
A method of underground gasification of a coal seam comprises the steps of opening it by drilling injection and production wells, interconnecting said wells, setting the coal afire and gasifying...
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4560205 |
Method for control of geometry of fragmented mass in an situ oil shale retort
A method for forming an in situ oil shale retort in a subterranean formation containing oil shale is provided. The in situ retort contains a fragmented permeable mass of formation particles within...
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4552214 |
Pulsed in situ retorting in an array of oil shale retorts
Greater product yield and quality and continuous upgrading of shale oil with hydrogen-rich, purge mode off gases is attained by pulsing in situ retorts at different phases and intervals. In the...
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4552409 |
In situ oil shale retort with controlled permeability for uniform flow
An in situ oil shale retort containing a fragmented permeable mass of formation particles having a generally uniform permeability across horizontal cross-sections of the retort is provided. To form...
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4545622 |
Method of rubblization for in-situ oil shale processing
A method that produces a uniformly rubblized oil shale bed of desirable porosity for underground, in-situ heat extraction of oil. Rubblization is the generation of rubble of various sized...
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4532991 |
Pulsed retorting with continuous shale oil upgrading
One or more in situ oil shale retorts are alternately operated in a combustion mode and a purge mode with a steam or water purge to produce a greater yield of shale oil. Hydrogen-rich off gases...
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4533181 |
Method for forming uniform flow rubble bed
An in situ oil shale retort containing a fragmented permeable mass of formation particles having a generally uniform permeability across horizontal cross-sections of the retort is provided. To form...
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4531783 |
Stability control in underground workings adjacent an in situ oil shale retort
In situ oil shale retorts are formed in spaced-apart rows, with adjacent rows of such retorts being separated by load-bearing inter-retort pillars of unfragmented formation sufficiently strong for...
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4522260 |
Method for creating a zone of increased permeability in hydrocarbon-containing subterranean formation penetrated by a plurality of wellbores
A method for creating a zone of increased permeability in a subterranean hydrocarbon-containing formation penetrated by a plurality of wellbores by penetrating the formation with a first wellbore;...
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4491179 |
Method for oil recovery by in situ exfoliation drive
A method for recovering oil from a bed of tight reservoir rock in which a chamber is formed at the base of the bed followed by alternately combusting rubble in the chamber while recovering oil...
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4487260 |
In situ production of hydrocarbons including shale oil
A procedure is described for producing hydrocarbons from hydrocarbon-bearing formations including shale oil from an oil shale body wherein combinations of vertical and slant holes are drilled into...
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4484629 |
Movable oxidizer injection point for production of coal in situ
After a linkage channel is established through an underground coal seam connecting two vertical wells, a tubing bender/straightener is positioned in a first well aligned with the linkage channel....
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4483398 |
In-situ retorting of oil shale
Fluid, such as liquid water, is injected into the rock surrounding an in situ oil shale retort at sufficient pressure and flow rate so that the injected fluid flows toward the retort to block the...
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RE31677 |
Process for recovery of carbonaceous materials from subterranean deposits
Subterranean mineral deposits, such as oil shale or the like, are prepared for in situ retorting by selectively mining out an area at the base of the deposit leaving an overlying deposit supported...
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4470460 |
In situ retorting or oil shale
An improved method of in situ retorting of oil shale wherein a cavern of crushed shale is created within an oil shale deposit, preferably by igniting a powerful explosion within the oil shale...
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4466668 |
Method of forming an in situ oil shale retort in formation with joints
A method for forming an in situ oil shale retort in a retort site in a subterranean formation containing oil shale and having at least one set of naturally occurring cleavage planes is provided....
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4458946 |
Secondary oil shale recovery technique
Following the conventional mining of rich oil shale for conventional above ground retorting, by horizontally extensive room and pillar mining operations, additional shale oil and related product...
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4457374 |
Transient response process for detecting in situ retorting conditions
A process is provided for determining retorting conditions in an in situ oil shale retort. In the process, the thickness of the hot shale zone is determined by monitoring the off gases in response...
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4454915 |
In situ retorting of oil shale with air, steam, and recycle gas
A flame front is ignited and passed through an underground oil shale retort to produce shale oil. The flame front is supported by a specially blended feed gas consisting essentially of air, steam...
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4449753 |
Method for bulking full a retort
A method for forming an in situ oil shale retort in a subterranean formation containing oil shale is provided. The in situ oil shale retort has top, bottom, and generally vertically extending side...
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4448249 |
Method of in situ oil shale retort ignition with oxygen control
A method for recovering liquid and gaseous products from an in situ oil shale retort containing a fragmented permeable mass of formation particles containing oil shale is provided. A hot ignition...
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4446921 |
Method for underground gasification of solid fuels
Method for the underground gasification of solid fuels in which an underground fuel deposit is initially opened up and then converted into a gaseous fuel by means of a gasification medium. The...
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