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7581587 |
Method for in-situ combustion of in-place oils
A novel method is provided for in situ combustion and recovery of oil from underground reservoirs including injecting air into the reservoir at a region near the reservoir floor, withdrawing...
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7533722 |
Surge chamber assembly and method for perforating in dynamic underbalanced conditions
A surge chamber assembly ( 70 ) for use in a wellbore includes a housing ( 80 ) having one or more openings ( 112 ), a surge chamber ( 100 ) and a combustion chamber ( 98 ). The openings ( 112 )...
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7114566 |
In situ thermal processing of a hydrocarbon containing formation using a natural distributed combustor
An in situ process for treating a hydrocarbon containing formation is provided. The process may include providing heat from one or more heat sources to at least a portion of the formation. Heat...
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7086468 |
In situ thermal processing of a hydrocarbon containing formation using heat sources positioned within open wellbores
A hydrocarbon containing formation may be treated using an in situ thermal process. Hydrocarbons, H 2 , and/or other formation fluids may be produced from the formation. Heat may be applied to the...
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7040397 |
Thermal processing of an oil shale formation to increase permeability of the formation
An oil shale 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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6994169 |
In situ thermal processing of an oil shale formation with a selected property
An oil shale 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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6991031 |
In situ thermal processing of a coal formation to convert a selected total organic carbon content into hydrocarbon products
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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6953087 |
Thermal processing of a hydrocarbon containing formation to increase a permeability of the formation
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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6951247 |
In situ thermal processing of an oil shale formation using horizontal heat sources
An oil shale formation may be treated using an in situ thermal process. Heat may be provided to a portion of the formation from one or more heat sources having a horizontal orientation in the...
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6729395 |
In situ thermal processing of a hydrocarbon containing formation with a selected ratio of heat sources to production wells
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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6729397 |
In situ thermal processing of a hydrocarbon containing formation with a selected vitrinite reflectance
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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6591907 |
In situ thermal processing of a coal formation with a selected vitrinite reflectance
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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5868202 |
Hydrologic cells for recovery of hydrocarbons or thermal energy from coal, oil-shale, tar-sands and oil-bearing formations
A system for recovery of hydrocarbons or thermal energy from host-rock fotions bearing coal, oil-shale, tar-sands or oil by use of a hydrologic cell which conveys a reacting fluid under pressure to...
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5832999 |
Method and assembly for igniting a burner assembly
A method and assembly for igniting a burner using a pyrophoric liquid. A quantity of pyrophoric liquid is first transported from a container to a slug launching chamber and then transporting into a...
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5431224 |
Method of thermal stimulation for recovery of hydrocarbons
A method for improving hydrocarbon flow from a consolidated, tight reservoir rock having authigenic clay cementation includes thermally heating the reservoir rock in-situ surrounding a production...
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5411098 |
Method of stimulating gas-producing wells
Subterranean mineral seams, such as coal, which have been penetrated by gas production wells are stimulated to produce additional gas by placing a liquid, such as a solvent for coal, in the...
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5360067 |
Vapor-extraction system for removing hydrocarbons from soil
The invention is a closed-loop, thermal process for remediating soil contaminated with hydrocarbon chemicals; it is particularly well suited for the remediation of soils containing hydrocarbons...
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5287926 |
Method and system for underground gasification of coal or browncoal
A method for underground gasification of coal or browncoal in an inclined coal seam, in which a substantially uniform gasification or combustion front is maintained by filling the cavity generated...
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5052490 |
Permeability of fines-containing earthen formations by removing liquid water
A method is disclosed for improving the effectiveness of fluid transport in a petroleum reservoir. That method comprises increasing the permeability of a portion of the reservoir by removing liquid...
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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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4858689 |
Coal gasification well drilling process
An in-situ coal gasification process for practice on a formation having one or more dipping coal seams that involves, directionally drilling a production wellbore into a burn module designated in...
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4818370 |
Process for converting heavy crudes, tars, and bitumens to lighter products in the presence of brine at supercritical conditions
A majority amount of a heavy hydrocarbon crude is reacted with a minor amount of brine, at supercritical temperature and pressure for the brine, for a predetermined period of time in order to...
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4754811 |
Controlled retracting gasifying agent injection point process for UCG sites
New controlled retracting gasifying agent injection point process for UCG sites. The process consists of a retraction of the gasifying agent injection point achieved by gradually plugging the...
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4747642 |
Control of subsidence during underground gasification of coal
Disclosed is a process for controlling subsidence during underground gasification of coal. Prior to the complete coal gasification step, holes are provided extending from the bottom to the top of...
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4690215 |
Enhanced crude oil recovery
Enhanced oil recovery from a crude oil reservoir is promoted following primary oil production, by subjecting the reservoir to water flooding, discontinuing the water flooding, preferably when the...
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4683947 |
Process and apparatus for monitoring and controlling the flammability of gas from an in-situ combustion oil recovery project
Process and apparatus are set forth for ascertaining and controlling the flammability of produced gas from an in-situ combustion enhanced petroleum production well whereby the produced oil is...
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4651826 |
Oil recovery method
The combustion front in an in situ combustion oil recovery operation is stabilized by cyclically varying the injection rate of the gaseous oxidant which is injected through the injection well....
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4625800 |
Method of recovering medium or high gravity crude oil
An improved tertiary recovery method for obtaining medium and high gravity crude oil from subsurface formations is disclosed wherein the gravity of the crude oil is downgraded. An in-situ...
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4577690 |
Method of using seismic data to monitor firefloods
A method for identifying the location of the extent of travel of a combustion front following an in situ oil recovery operation employs a source of seismic energy and at least one seismic receiver...
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4574884 |
Drainhole and downhole hot fluid generation oil recovery method
Viscous oil is recovered by a process that increases sweep efficiency and heat and fuel utilization and that reduces well and compression requirements and costs. Initially, fluid pressure...
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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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4557328 |
Method for underground burning of coal for energy
A method and apparatus for generating heat from in situ in ground burning of coal. The method described involves lowering a boiler connected to a water line and a steam line into burning coal...
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4552216 |
Method of producing a stratified viscous oil reservoir
This invention discloses a more efficient and more self supporting method of producing oil from a viscous oil-bearing permeability stratified reservoir. In situ combustion with oxygen is carried...
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4502539 |
Method for the underground gasification of coal or browncoal
A method for the underground gasification of coal or browncoal, using two boreholes extending through a coal layer with the slope of said layer, for supplying oxygen to a combustion and...
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4489983 |
Blasthole spacing for control of particle size
A method for controlling the average particle size of a fragmented permeable mass of formation particles formed in an in situ retort in a subterranean formation containing oil shale is provided. At...
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4480689 |
Block pattern method for in situ gasification of subterranean carbonaceous deposits
Any desired number of alternate parallel rows of injection and production well bores are positioned to establish a block gasification pattern. Combustion links are established between adjacent...
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4465135 |
Fire flood method for recovering petroleum from oil reservoirs of low permeability and temperature
The present invention is directed to a method of enhanced oil recovery by fire flooding petroleum reservoirs characterized by a temperature of less than the critical temperature of carbon dioxide,...
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4450910 |
Thermal recovery of viscous oil from a dipping reservoir
Disclosed is a method for recovering oil from a dipping subterranean, viscous oil-containing reservoir having an underlying body of water. An in situ combustion operation is initiated using an...
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4422505 |
Method for gasifying subterranean coal deposits
A method for gasifying subterranean coal deposits by positioning a cased injection well to extend from the surface into the coal deposit with the injection well extending horizontally through the...
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4396064 |
Method and apparatus for injecting a gaseous stream into a subterranean zone
In a method for injecting a gaseous stream into a hot subterranean zone by positioning a casing means in fluid communication with the hot subterranean zone and the surface; insulating a lower...
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4393934 |
Conditioning a coal seam prior to in-situ gasification
A method for conditioning a coal seam prior to in-situ gasification to increase the permeability of the coal seam to the flow of combustion-supporting gas therethrough and thus increase the...
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4387768 |
Modified in situ retorting of oil shale
Rubblized oil shale beds to be processed by the modified in situ retorting technique are U-shaped so that the inlet end and outlet end of the bed communicate with a common channel.
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4384613 |
Method of in-situ retorting of carbonaceous material for recovery of organic liquids and gases
The method of the present invention involves a two-phase process for in-situ retorting and recovery of carbonaceous material contained within typical subterranean tar sand formations, and includes...
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4334579 |
Method for gasification of deep, thin coal seams
A method of gasification of coal in deep, thin seams by using controlled bending subsidence to confine gas flow to a region close to the unconsumed coal face. The injection point is moved...
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4273188 |
In situ combustion process for the recovery of liquid carbonaceous fuels from subterranean formations
An integrated in situ combustion process for recovering subterranean liquid and solid carbonaceous deposits in which the resulting flue gas of low heating value is combusted at substoichiometric...
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4250962 |
In situ combustion process for the recovery of liquid carbonaceous fuels from subterranean formations
An integrated in situ combustion process for producing subterranean carbonaceous deposits in which the resulting flue gas of low heating value is combusted over an oxidation catalyst at...
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4233166 |
Composition for recovering hydrocarbons
A process for recovering hydrocarbons from a subterranean formation in which in situ combustion is first initiated in the formation by injection of air, for example, through an injection well, the...
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4228856 |
Process for recovering viscous, combustible material
A process for recovering a viscous, combustible material, for example tar from a tar sand or oil and bitumen from heavy oil, from a sub-surface deposit of the material. The process comprises...
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4224990 |
Method for flattening the combustion zone in an in situ oil shale retort by the addition of fuel
A secondary combustion zone is established and its location controlled in a fragmented mass of particles containing oil shale in an in situ oil shale retort. A processing zone including a primary...
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4222437 |
Method for in situ gas production from coal seams
Gas is produced and extracted from a coal deposit by drilling a row of supply wells in the deposit for receiving air or another combustion supporting gas, cutting horizontal inclined supply...
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