Class 166/258 - Plural distinct superimposed formations

Subclass of Class 166 - Wells
Definition: A process in which plural, naturally distinct, vertically
No. of patents: 30
Last issue date: 05/15/2012

Number	Title	Issue Date
8176980	Method of gas-cap air injection for thermal oil recovery A method for producing bitumen or heavy oil from a subsurface oil sands reservoir, the subsurface oil sands reservoir and an overlying gas zone in fluid communication, the method includes providing an in situ combustion process in the overlying gas zone, to create o...	05/15/2012
7934549	Passive heating assisted recovery methods A method for producing hydrocarbons from a region having adjacent strata divided by an impermeable or partially permeable barrier and, wherein at least one of the strata contains hydrocarbons, comprises of sufficiently heating one of the stratum to allow heat to be ...	05/03/2011
7866386	In situ oxidation of subsurface formations Methods and systems for treating a hydrocarbon containing formation described herein include providing heat to a first portion of the formation from a plurality of heaters in the first portion, producing produced through one or more production wells in a second port...	01/11/2011
7367399	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 ...	05/06/2008
7156172	Method for accelerating oil well construction and production processes and heating device therefor Methods are described for providing localized heating in an oil well at precise depths to accomplish or expedite specific objectives. The methods involve the use of a heating tool which can be lowered into an oil well to apply heat at a precise depth to achieve a de...	01/02/2007
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
7066254	In situ thermal processing of a tar sands formation An in situ process for treating a tar sands formation is provided. The process may include providing heat from one or more heaters to at least a portion of the formation. The heat may be allowed to transfer from the one or more heaters to a part of the formation suc...	06/27/2006
6994161	In situ thermal processing of a coal formation with a selected moisture content A coal formation may be treated using an in situ thermal process. A mixture of hydrocarbons, H2, and/or other formation fluids may be produced from the formation. Heat may be applied to the formation to raise a temperature of a portion of the formation to...	02/07/2006
6981548	In situ thermal recovery from a relatively permeable formation A method for treating a relatively permeable formation containing heavy hydrocarbons in situ may include providing heat from a first set of heat sources to a first section of the formation. The heat provided to the first section may pyrolyze at least some hydrocarbo...	01/03/2006
6918444	Method for production of hydrocarbons from organic-rich rock A method for accelerating the conversion of kerogen to hydrocarbons in a subterranean formation containing organic-rich rock that is located in the vicinity of reservoir-quality strata. Sufficient heat is generated in the reservoir-quality strata such that it heats ...	07/19/2005
6742587	In situ thermal processing of a coal formation to form a substantially uniform, relatively high permeable formation A coal formation may be treated using an in situ thermal process. Hydrocarbons, H2, and/or other formation fluids may be produced from the formation. Heat may be applied to the formation to raise a temperature of a portion of the formation to a pyrolysis ...	06/01/2004
6722431	In situ thermal processing of hydrocarbons within a relatively permeable formation A hydrocarbon containing formation may be treated using an in situ thermal process. Hydrocarbons, H2, and/or other formation fluids may be produced from the formation. Heat may be applied to a first portion of the formation to mobilize hydrocarbons within...	04/20/2004
6715547	In situ thermal processing of a hydrocarbon containing formation to form a substantially uniform, high permeability formation A hydrocarbon containing formation may be treated using an in situ thermal process. Hydrocarbons, H2, and/or other formation fluids may be produced from the formation. Heat may be applied to the formation to raise a temperature of a portion of the formati...	04/06/2004
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 series thereof, opening the seams by drilling operating wells...	09/09/1986
4448252	Minimizing subsidence effects during production of coal in situ Coal is reduced to ash in place by gasification using in situ production techniques, resulting in significant void space underground, which in turn causes roof fall and subsidence. Overburden collapse is stabilized by backfilling with foaming mud cement t...	05/15/1984
4344483	Multiple-site underground magnetic heating of hydrocarbons A first underground deposit of lignite or coal is heated by magnetic induction to recover hydrocarbon liquids and gases. The carbon remaining is combusted with air and steam to produce a gas which is combusted to generate electrical energy. The electrical...	08/17/1982
4243101	Coal gasification method A method for underground gasification of coal or brown coal, in which a substantially uniform gasification or combustion front is maintained by filling the cavity generated by gasification of coal with a filler so as to drive said front in an upward direc...	01/06/1981
4239283	In situ oil shale retort with intermediate gas control A method for recovering liquid and gaseous products from an in situ oil shale retort in a subterranean formation containing oil shale is disclosed. The method is practiced on an in situ oil shale retort having a plurality of fragmented permeable masses of...	12/16/1980
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 passages along the bottom of the deposit extending from the botto...	09/16/1980
4114688	Minimizing environmental effects in production and use of coal Coal gas is produced in situ using the techniques of gasification, liquefaction and pyrolysis. Normal effluents to the atmosphere are recycled in part to the underground reaction zone for conversion into commercial products. Contaminants to underground aq...	09/19/1978
4089374	Producing methane from coal in situ A well is drilled from the surface of the earth into an underground coal formation. The coal seam is fractured by fluids injected under pressure. Methane entrained in the cracks and fissures is removed to surface facilities. Coal seam in the vicinity of w...	05/16/1978
4069868	Methods of fluidized production of coal in situ A method of producing combustible gases, synthetic crude oils, coal chemicals and heat from coal in situ utilizes the combined teachings of in situ gasification, liquefaction and pyrolysis in separated coal blocks....	01/24/1978
4068715	Method for recovering viscous petroleum Disclosed is a method for recovering viscous oil from subterranean, viscous oil containing formations, particularly from shallow formations which overlie water zones. The production well is completed in the entire oil zone and small amount in the water zo...	01/17/1978
4059151	Methods of fluidized production of coal in situ A method of producing combustible gases, synthetic crude oils, coal chemicals and heat from coal in situ utilizes the combined teachings of in situ gasification, liquefaction and pyrolysis in separated coal blocks....	11/22/1977
4042026	Method for initiating an in-situ recovery process by the introduction of oxygen A method for starting a process to recover energy raw materials from a subterranean formation whereby igniters are injected into the upper region of the formation and inert gas is injected into the lower region of the formation, and thereafter an oxygen-c...	08/16/1977
4018279	In situ coal combustion heat recovery method A method for recovery of heat generated by the combustion of coal in situ within coal seams in the earth. Three embodiments are described: one, in which the coal seam crops out and into which can be drilled and inserted a pipe, through the coal seam, to a...	04/19/1977
4015663	Method of subterranean steam generation by in situ combustion of coal This specification discloses a method of recovering the thermal energy of a subterranean coal formation that is penetrated by at least two wells. The subterranean coal formation is fractured by hydraulic fracturing techniquesto form at least two spaced ap...	04/05/1977
4010800	Producing thin seams of coal in situ A method of extracting energy and chemical values from coal in situ including the steps of establishing passages among two or more coal seams underground and the surface of the ground wherein one coal seam is consumed by in situ combustion with the hot ex...	03/08/1977
3997004	Method for recovering viscous petroleum Disclosed is a method for recovering viscous oil from subterranean, viscous oil containing formations, particularly from shallow formations which overlie water zones. An injection well is completed in the lower part of the oil formation and an equivalent ...	12/14/1976
3978920	In situ combustion process for multi-stratum reservoirs In a combustion process for recovering hydrocarbons from a subterranean hydrocarbon-bearing formation comprising an upper permeable hydrocarbon-bearing stratum overlying a lower permeable hydrocarbon-bearing stratum and separated therefrom by a semi-perme...	09/07/1976

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Class 166/258 - Plural distinct superimposed formations