Process for recovering carbonaceous values from in situ oil shale retorting
An in situ oil shale retort containing a fragmented permeable mass of formation particles containing oil shale is formed in a subterranean formation containing oil shale. To retort oil shale in the retort, a primary combustion zone is established in the fragmented mass. A primary combustion zone feed containing oxygen is introduced to the primary combustion zone for advancing the primary combustion zone through the fragmented mass. A secondary combustion zone is established in the fragmented mass on the trailing side of the primary combustion zone. A retort feed mixture is introduced into the secondary combustion zone. The retort feed mixture contains sufficient fuel and oxygen for maintaining the secondary combustion zone and for forming a primary combustion zone feed containing oxygen for advancing the primary combustion zone through the fragmented mass.
- Assignee:
- Occidental Oil Shale Inc
- Patent Number(s):
- US 4191251
- OSTI ID:
- 5537467
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
040401* -- Oil Shales & Tar Sands-- In Situ Methods
True & Modified
BITUMINOUS MATERIALS
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
COMBUSTION WAVES
DECOMPOSITION
ELEMENTS
ENERGY SOURCES
FOSSIL FUELS
FRAGMENTATION
FUELS
IN-SITU PROCESSING
IN-SITU RETORTING
MATERIALS
NONMETALS
OIL SHALES
OXYGEN
PERMEABILITY
PROCESSING
RETORTING