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Structural Deformation of Green River Oil Shale as It Relates to in situ Retorting.

PB205503

Publication Date	1971
Personal Author	Tisot, P. R.; Sohns, H. W.
Page Count	30
Abstract	Results from this investigation indicates that underground retorting of Green River oil shale may be seriously impaired through loss of induced permeability brought about by structural deformation of rich oil shale under the influence of heat and compressive stress. Stress-strain-time-temperature relationships obtained provide information regarding the oil shale's yield temperature, yield stress, rate of compressive strain, and loss of mechanical strength. Effect of structural deformation on induced permeability in small columns of confined fragments are presented. Structural response and/or deformation was determined for each of four different grade Green River oil shales (27.0-, 34.5-, 45.5-, and 63.5-gal/ton) as they were heated in an inert atmosphere, under constant compressive stress, from ambient to subretorting temperatures. Small cores and small columns of confined fragments comprised the test specimens. Structural response of some cores was observed as they were heated in a stress-free environment. (Author)
Keywords	Oil shale Oil recovery Fracture properties Shale oil Deformation Compressive strength Strain measurement Stresses Test equipment Permeability Green River formation
Source Agency	Invalid Source Agency Code
NTIS Subject Category	48A - Mineral Industries 97K - Fuels
Corporate Authors	Bureau of Mines, Washington, D. C.
Document Type	Technical Report
Title Note	Rept. of Investigations.
NTIS Issue Number	197204

Structural Deformation of Green River Oil Shale as It Relates to in situ Retorting.

Structural Deformation of Green River Oil Shale as It Relates to in situ Retorting.
PB205503

Publication Date	1971
Personal Author	Tisot, P. R.; Sohns, H. W.
Page Count	30
Abstract	Results from this investigation indicates that underground retorting of Green River oil shale may be seriously impaired through loss of induced permeability brought about by structural deformation of rich oil shale under the influence of heat and compressive stress. Stress-strain-time-temperature relationships obtained provide information regarding the oil shale's yield temperature, yield stress, rate of compressive strain, and loss of mechanical strength. Effect of structural deformation on induced permeability in small columns of confined fragments are presented. Structural response and/or deformation was determined for each of four different grade Green River oil shales (27.0-, 34.5-, 45.5-, and 63.5-gal/ton) as they were heated in an inert atmosphere, under constant compressive stress, from ambient to subretorting temperatures. Small cores and small columns of confined fragments comprised the test specimens. Structural response of some cores was observed as they were heated in a stress-free environment. (Author)
Keywords	Oil shale Oil recovery Fracture properties Shale oil Deformation Compressive strength Strain measurement Stresses Test equipment Permeability Green River formation
Source Agency	Invalid Source Agency Code
NTIS Subject Category	48A - Mineral Industries 97K - Fuels
Corporate Authors	Bureau of Mines, Washington, D. C.
Document Type	Technical Report
Title Note	Rept. of Investigations.
NTIS Issue Number	197204