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US 2010/0163226 A1Published application
Supercritical fluid recovery and refining of hydrocarbons from hydrocarbon-bearing formations applying fuel cell gas in situ
AssigneeCritical Point Energy, LLC
InventorDavid Allen ZORNES
Life of this patent
Estimating the term…
Abstract
A plume of combined gases are infused into hydrocarbon-bearing formations, “inert” as the major gas and “reactive” as the minor gas, where the minor gas reacts with hydrocarbons to fully saturate hydrocarbons with supercritical fluid, which migrate hydrocarbons out of formations, even at great distances from the regulated fuel cell source. Coal, tar sands, petroleum-contaminated soil, and/or oil wells that have lost gas pressure can also be desorbed by this in-situ method.
Claims12
A method for the in-situ recovery of hydrocarbons from hydrocarbon-bearing formations comprising:
- forming a bore hole seal assembly having an elongated substantially cylindrical outer housing,
- providing said elongated bore hole seal assembly with an interior containing a port to an upwardly extending intake air supply line and including in said upwardly extending intake air supply line a minor reactive gas intake regulator and valve,
- drilling two bore holes into a subterranean hydrocarbon-bearing formation,
- lowering said elongated bore hole seal assembly into one of two said bore holes to a position surrounded by the hydrocarbon-bearing formation with said first and second bore holes having been drilled to define a diameter relative to said elongated bore hole seal assembly housing, insuring a close fit there between while providing a gas space between,
- providing a plurality of seal members within said bore hole around said elongated bore hole seal assembly restricting gas leaks, whereby
- supplying a major inert gas to said supply line from gas supply means disposed above ground,
- supplying a minor reactive gas (reactive to hydrocarbon) to said regulator valving in major inert gas air line from gas supply means disposed above ground,
- regulating said major inert gas supply means and said minor reactive gas supply means to progressively and radially infuse gas into surrounding undisturbed hydrocarbon-bearing formation,
- monitoring the hydrocarbon-bearing formations and manipulating said regulation of said gas supply means to maintain SCF gas cell formation in hydrocarbon-bearing formation,
- insuring, during said regulating of said major inert gas supply means and said minor reactive gas supply means, that microbursts of reactive gas form SCF from the major inert gas reacting with hydrocarbons,
- insuring, during said monitoring of the temperature and pressure of the hydrocarbon-bearing formation, that a pressure at over 1 to 7 atmospheres is maintained, whereby,
- collecting the hydrocarbon generated from said first bore hole through said adjacent bore hole near the same hydrocarbon-bearing formation.
9 more elements
A method for the in-situ recovery of hydrocarbons from hydrocarbon-bearing formations comprising:
- forming a heater assembly having an elongated substantially cylindrical outer housing,
- providing said elongated heater assembly with an interior containing a fuel cell therein joined to an upwardly extending intake air supply line and including in said interior an upwardly extending exhaust gas line disposed adjacent an upwardly extending combustion air line,
- drilling a bore hole into a subterranean hydrocarbon-bearing formation,
- lowering said fuel cell assembly into said bore hole to a position surrounded by the hydrocarbon-bearing formation, with said bore hole having been drilled to define a diameter relative to said fuel cell assembly housing insuring a close fit there between while providing a gas space between,
- providing a plurality of seal members within aid bore hole above said heater assembly, whereby
- supplying fuel gas to said fuel gas supply line from fuel gas supply means disposed above ground,
- supplying air to said air line from air supply means disposed above ground,
- regulating said gas supply means and said combustion air supply means to operate said fuel cells in heater assembly and said heater assembly outer housing and thence, through convection and radiation, to progressively and radially heat the surrounding undisturbed hydrocarbon-bearing formation,
- monitoring the temperature of the heated hydrocarbon-bearing formations and manipulating said regulating of said supply means to maintain the temperature of the heated hydrocarbon-bearing formations at approximately 1200° F. to 1800° F.,
- insuring, during said regulating of said gas supply means and said air supply means, that a temperature of over 150° C. is maintained,
- insuring, during said monitoring of the temperature of the heated hydrocarbon-bearing bed formation, that a temperature of less than range of 150° C. to 1371° C. and gas pressure at 3 to 7 atmospheres is maintained, whereby,
- collecting the hydrocarbon generated gases from said bore hole through said fuel cell line and
- natural gas within said bore hole is precluded from exiting said bore hole other than through said fuel cells.
10 more elements
Dependencies are inferred from the claim text.