Combined combustion for in-situ retorting of oil shales

Patent · Tue Apr 18 04:00:00 EST 1978

OSTI ID:6886711

Allred, V D

Shale oil is recovered from oil shale formations by rubblizing or otherwise fracturing the formation establishing zones for an oxidizing gas injection and off gas and product recovery, igniting the formation at a point intermediate between the injection and recovery zones which is the first phase of the process causing a heat front to move cocurrent and a combustion front countercurrent to the injected gas stream followed by a second process phase which occurs when the combustion front reaches the zone of oxidant injection and reverses itself oxidizing the residual organic matter laid down on the retorted shale and supplying additional heat to continue the heat front movement to the product recovery zone and completing the retorting of the shale downstream from the ignition zone while recovering heat from the retorted shale in the form of gas preheat.

• Assignee: Marathon Oil Co.
• Patent Number(s): US 4084640
• OSTI ID: 6886711
• Country of Publication: United States
• Language: English

Related Subjects

04 OIL SHALES AND TAR SANDS
040401* -- Oil Shales & Tar Sands-- In Situ Methods
True & Modified
BITUMINOUS MATERIALS
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
COMBUSTION
COMMINUTION
ENERGY RECOVERY
ENERGY SOURCES
FOSSIL FUELS
FRACTURING
FUELS
HEAT RECOVERY
IN-SITU COMBUSTION
IN-SITU PROCESSING
IN-SITU RETORTING
MINERAL OILS
OIL SHALES
OILS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
OXIDATION
PROCESSING
RECOVERY
RETORTING
SHALE OIL
SYNTHETIC FUELS
SYNTHETIC PETROLEUM