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Structural Response of Propped Fractures in Green River Oil Shale as It Relates to Underground Retorting.

PB241217

Publication Date	1975
Personal Author	Tisot, P. R.
Page Count	30
Abstract	Structural response and/or deformation of propped fractures was determined for each of two different grades of Green River oil shale (38.0 and 29.0 gpt) as they were heatd in an inert atmosphere from ambient to subretorting temperatures. Small oil shale cores propped apart by 3-mm glass beads were heated in a specially designed test cell at a uniform rate to a temperature not exceeding 800 degrees F. The propped specimens were heated under stress levels from 100 to 1,000 psi in biaxial and in triaxial confinement. Results from this study indicate that underground retorting of Green River oil shale may be seriously impaired through loss of permeability in process that uses propped fractures between injection and producing wells to recover shale oil from oil shales which assay more than 28 gpt.
Keywords	Oil shale In situ processing Dynamic structural analysis Settlement(Structural) Permeability Fracture properties Fractures(Materials) Deformation Thermal stresses Compression tests
Source Agency	Bureau of Mines
NTIS Subject Category	48A - Mineral Industries
Corporate Authors	Bureau of Mines, Laramie, Wyo. Laramie Energy Research Center.
Document Type	Technical Report
Title Note	Rept. of investigations.
NTIS Issue Number	197515

Structural Response of Propped Fractures in Green River Oil Shale as It Relates to Underground Retorting.

Structural Response of Propped Fractures in Green River Oil Shale as It Relates to Underground Retorting.
PB241217

Publication Date	1975
Personal Author	Tisot, P. R.
Page Count	30
Abstract	Structural response and/or deformation of propped fractures was determined for each of two different grades of Green River oil shale (38.0 and 29.0 gpt) as they were heatd in an inert atmosphere from ambient to subretorting temperatures. Small oil shale cores propped apart by 3-mm glass beads were heated in a specially designed test cell at a uniform rate to a temperature not exceeding 800 degrees F. The propped specimens were heated under stress levels from 100 to 1,000 psi in biaxial and in triaxial confinement. Results from this study indicate that underground retorting of Green River oil shale may be seriously impaired through loss of permeability in process that uses propped fractures between injection and producing wells to recover shale oil from oil shales which assay more than 28 gpt.
Keywords	Oil shale In situ processing Dynamic structural analysis Settlement(Structural) Permeability Fracture properties Fractures(Materials) Deformation Thermal stresses Compression tests
Source Agency	Bureau of Mines
NTIS Subject Category	48A - Mineral Industries
Corporate Authors	Bureau of Mines, Laramie, Wyo. Laramie Energy Research Center.
Document Type	Technical Report
Title Note	Rept. of investigations.
NTIS Issue Number	197515