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| Number | Title | Issue Date |
| 8167036 | 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 oxygen into the reservoir at a region near the reservoir floor, establishing a combustion front wherein hot combustion gases rise at the combustion ... | 05/01/2012 |
| 8136590 | Systems and methods for producing oil and/or gas A system for producing oil and/or gas from an underground formation comprising a first array of wells dispersed above the formation; a second array of wells dispersed above the formation; wherein the first array of wells comprises a mechanism to inject a miscible en... | 03/20/2012 |
| 8132620 | Triangle air injection and ignition extraction method and system The present invention is a process for recovering oil from an underground oil-containing reservoir. The process includes providing one or more injection wells for injecting a gaseous fluid (steam and air) into the reservoir, the one or more injection wells having a ... | 03/13/2012 |
| 8104535 | Method of improving waterflood performance using barrier fractures and inflow control devices The present invention is directed to a method of hydrocarbon production from a hydrocarbon reservoir. The method includes providing a substantially horizontal wellbore having at least one productive interval within a hydrocarbon reservoir and forming at least one no... | 01/31/2012 |
| 8087460 | Granular electrical connections for in situ formation heating A method for heating a subsurface formation using electrical resistance heating is provided. In one aspect, the method includes creating a passage in the subsurface formation between a first wellbore located at least partially within the subsurface formation, and a ... | 01/03/2012 |
| 7926561 | Systems and methods for producing oil and/or gas A system for producing oil and/or gas from an underground formation comprising a first array of wells dispersed above the formation; a second array of wells dispersed above the formation; wherein the first array of wells comprises a mechanism to inject a miscible en... | 04/19/2011 |
| 7909093 | In situ combustion as adjacent formation heat source Methods and apparatus relate to in situ combustion. Configurations of injection and production wells facilitate the in situ combustion. A first production well disposed in a first oil bearing reservoir is spaced from a second production well disposed in a second oil... | 03/22/2011 |
| 7841401 | Gas injection to inhibit migration during an in situ heat treatment process Methods of treating a subsurface formation are described herein. Methods for treating a subsurface treatment area in a formation may include introducing a fluid into the formation from a plurality of wells offset from a treatment area of an in situ heat treatment pr... | 11/30/2010 |
| 7819187 | System and method for producing fluids from a subterranean formation The system of subterranean wells includes a subsurface flow line 20 having at least a portion within or underlining one or more subterranean formations 12. One or more drainage wells 26, 28, 30, 32, and 34 each extend from the surface and... | 10/26/2010 |
| 7814974 | Systems, methods and apparatuses for monitoring and recovery of petroleum from earth formations A system for production of petroleum from an earth formation is provided. The system includes: at least one injection borehole for injecting a thermal source into the formation; at least one production borehole for recovering material including the petroleum from th... | 10/19/2010 |
| 7743826 | In situ method and system for extraction of oil from shale A system and process is disclosed for retorting oil shale and extracting shale oil and other hydrocarbons therefrom, in which a cased heat delivery well is drilled generally vertically through an overburden and then through a body of oil shale to be retorted to the ... | 06/29/2010 |
| 7740062 | System and method for the recovery of hydrocarbons by in-situ combustion A system and a method for recovering hydrocarbons from a reservoir containing hydrocarbons, by in-situ combustion. The system includes a primary liquid production wellbore having a substantially horizontal primary production length extending through the reservoir, a... | 06/22/2010 |
| 7730942 | Method and equipment for the reduction of multiple dispersions A method and equipment for reducing or avoiding multiple dispersions in fluid flows each having two or more non-mixable fluid components with different specific gravities and viscosities, in particular fluid flows of oil, gas and water from different oil/gas product... | 06/08/2010 |
| 7703513 | Wax barrier for use with in situ processes for treating formations Methods for forming a barrier around at least a portion of a treatment area in a subsurface formation are described herein. A material including wax may be introduced into one or more wellbores. The material introduced into two or more wells may mix in the formation... | 04/27/2010 |
| 7635023 | Time sequenced heating of multiple layers in a hydrocarbon containing formation A method for treating a hydrocarbon containing formation may include providing heat to a first hydrocarbon layer in the formation from a first heater located in an opening in the formation. The opening and the first heater may have a horizontal or inclined portion l... | 12/22/2009 |
| 7635024 | Heating tar sands formations to visbreaking temperatures Methods for treating a tar sands formation are described herein. Methods may include heating at least a section of a hydrocarbon layer in the formation from a plurality of heaters located in the formation. The heat may be controlled so that at least a majority of th... | 12/22/2009 |
| 7631690 | Heating hydrocarbon containing formations in a spiral startup staged sequence Methods for treating a hydrocarbon containing formation are described herein. Methods may include treating a first zone of the formation. Treatment of a plurality of zones of the formation may be begun at selected times after the treatment of the first zone begins. ... | 12/15/2009 |
| 7631689 | Sulfur barrier for use with in situ processes for treating formations Methods for forming a barrier around at least a portion of a treatment area in a subsurface formation are described herein. Sulfur may be introduced into one or more wellbores located inside a perimeter of a treatment area in the formation having a permeability of a... | 12/15/2009 |
| 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 combustion products from a region near the reservoir ceiling, and collectin... | 09/01/2009 |
| 7562706 | Systems and methods for producing hydrocarbons from tar sands formations A system for treating a tar sands formation is disclosed. A plurality of heaters are located in the formation. The heaters include at least partially horizontal heating sections at least partially in a hydrocarbon layer of the formation. The heating sections are at ... | 07/21/2009 |
| 7562707 | Heating hydrocarbon containing formations in a line drive staged process Method for treating a hydrocarbon containing formation are described herein. Methods may include providing heat to a first section of the formation with one or more first heaters in the first section. First hydrocarbons may be heated in the first section such that a... | 07/21/2009 |
| 7549470 | Solution mining and heating by oxidation for treating hydrocarbon containing formations A method for treating an oil shale formation comprising nahcolite includes providing a first fluid to a portion of the formation. A second fluid is produced from the portion. The second fluid includes at least some nahcolite dissolved in the first fluid. A controlle... | 06/23/2009 |
| 7546873 | Low temperature barriers for use with in situ processes A method of forming and maintaining a low temperature zone around at least a portion of a subsurface treatment area is described. The method includes reducing a temperature of heat transfer fluid with a refrigeration system. The heat transfer fluid is circulated thr... | 06/16/2009 |
| 7540324 | Heating hydrocarbon containing formations in a checkerboard pattern staged process Method for treating a hydrocarbon containing formation are described herein. Methods may include providing heat to two or more first sections of the formation with one or more first heaters in two or more of the first sections. The provided heat may mobilize first h... | 06/02/2009 |
| 7516784 | In-situ method of coal gasification A method is provided for in-situ gasification of coal wherein a network of fractures is formed by providing a substantially vertically disposed borehole and a plurality of substantially horizontally disposed boreholes in fluid communication with the substantially ve... | 04/14/2009 |
| 7516785 | Method of developing subsurface freeze zone A method for lowering the temperature of a portion of a subsurface formation is provided. Preferably, the formation is an oil shale formation. The method includes the step of injecting a cooling fluid under pressure into a wellbore, with the wellbore having been com... | 04/14/2009 |
| 7513304 | Method for drilling with improved fluid collection pattern A method for improving underground fluid collection and removal. The method includes drilling one well with a vertical section and a horizontal section having main bores and branches. All of the branches are substantially in one horizontal plane except one branch fo... | 04/07/2009 |
| 7493951 | Under-balanced directional drilling system A production well arrangement that includes a vertical main well extending into a gas producing strata and an access hole having a vertical portion coupled to a curved portion, which is coupled to a lateral portion. The vertical portion has an upper end defined on t... | 02/24/2009 |
| 7416022 | In-situ method of producing oil shale, on-shore and off-shore A method is provided for in-situ production of oil shale wherein a network of fractures is formed by injecting liquified gases into at least one substantially horizontally disposed fracturing borehole. Heat is thereafter applied to liquify the kerogen so that oil sh... | 08/26/2008 |
| 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 |
| 7360588 | Thermal processes for subsurface formations A process may include providing heat from one or more heaters to at least a portion of a subsurface formation. Heat may transfer from one or more heaters to a part of a formation. In some embodiments, heat from the one or more heat sources may pyrolyze at least some... | 04/22/2008 |
| 7360595 | Method and system for underground treatment of materials A method for underground treatment of subsurface materials comprises providing an injection pattern and a recovery pattern, the injection pattern and the recovery pattern located proximate to a subsurface treatment zone and at least one of the injection pattern and ... | 04/22/2008 |
| 7335246 | Contaminant adsorption and oxidation via the fenton reaction Contaminated fluids are treated by adsorbing contaminant onto a sorbent to concentrate the contaminant and then oxidizing the contaminant via the Fenton and related reactions. Iron is attached to the sorbent or can be added in solution with an oxidant. Both systems,... | 02/26/2008 |
| 7331385 | Methods of treating a subterranean formation to convert organic matter into producible hydrocarbons Methods are provided that include the steps of providing wells in a formation, establishing one or more fractures (12) in the formation, such that each fracture intersects at least one of the wells (16, 18), placing electrically conductive material in ... | 02/19/2008 |
| 7328743 | Toe-to-heel waterflooding with progressive blockage of the toe region A modified toe-to-heel waterflooding (TTHW) process is provided for recovering oil from a reservoir in an underground formation. After establishing the conventional TTHW waterflood, the process includes placing a chemical blocking agent at the watered out producing ... | 02/12/2008 |
| 7320365 | Methods for increasing production from a wellbore The present invention generally relates to a method for recovering productivity of an existing well. First, an assembly is inserted into a wellbore, the assembly includes a tubular member for transporting drilling fluid downhole and an under-reamer disposed at the e... | 01/22/2008 |
| 7303608 | Groundwater reactive gas injection and venting system for a groundwater remediation system In a system for collecting gas from a subsurface body of contaminated water, a site collects unabsorbed reactive gas from the subsurface body of contaminated water. In addition, a vacuum source is connected to the site. Furthermore, a controller regulates a flow of ... | 12/04/2007 |
| 7303006 | Method for improved vertical sweep of oil reservoirs In a WAG flood oil is displaced from a subterranean formation by injecting water alternately with gas into a single injection completion per pattern. The ratio of water to gas injected is the WAG ratio. In this invention, two separate injection completions are used ... | 12/04/2007 |
| 7290959 | Electrode heating with remediation agent A remediation method and system is disclosed. A plurality of conductors is installed into the subsurface to introduce electrical current to produce heat in the subsurface. One or more agents are released into the subsurface to cause or accelerate the decomposition o... | 11/06/2007 |
| 7289942 | Performance prediction method for hydrocarbon recovery processes The invention relates to a method for predicting the performance of large-scale hydrocarbon-bearing reservoir floods. One embodiment of the invention includes a method for predicting performance of a patterned flooding process in a subterranean hydrocarbon-bearing f... | 10/30/2007 |
