Formation of in situ oil shale retort with void at the top
Patent
·
OSTI ID:6783961
A method of forming an in situ oil shale retort with an open space or inlet plenum void between the top boundary of the fragmented permeable mass of oil shale particles and the unfragmented formation above the retort. The method comprises excavating at least one horizontal void in the formation, placing explosive into the unfragmented formation above and below the void, and then explosively expanding formation above the void prior to explosively expanding formation below the void. The additional time for expansion of formation above the void, as compared with that below the void, permits non-uniform expansion and leaves an open space over the top of the fragmented mass.
- Assignee:
- Occidental Oil Shale Inc
- Patent Number(s):
- US 4238136
- OSTI ID:
- 6783961
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
04 OIL SHALES AND TAR SANDS
040401* -- Oil Shales & Tar Sands-- In Situ Methods
True & Modified
BITUMINOUS MATERIALS
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
DECOMPOSITION
ENERGY SOURCES
EXPLOSIONS
FOSSIL FUELS
FUELS
IN-SITU PROCESSING
IN-SITU RETORTING
MATERIALS
OIL SHALES
PROCESSING
RETORTING
UNDERGROUND EXPLOSIONS
VOIDS
040401* -- Oil Shales & Tar Sands-- In Situ Methods
True & Modified
BITUMINOUS MATERIALS
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
DECOMPOSITION
ENERGY SOURCES
EXPLOSIONS
FOSSIL FUELS
FUELS
IN-SITU PROCESSING
IN-SITU RETORTING
MATERIALS
OIL SHALES
PROCESSING
RETORTING
UNDERGROUND EXPLOSIONS
VOIDS