− | This raises the possibility that either a stratigraphic change;<ref name=ch09r70>Winland, H., D., 1972, Oil accumulation in response to pore size changes, Weyburn field, Saskatchewan: Amoco Production Company Report F72-G-25, 20 p. (unpublished).</ref><ref name=ch09r71>Winland, H., D., 1976, Evaluation of gas slippage and pore aperture size in carbonate and sandstone reservoirs: Amoco Production Company Report F76-G-5, 25 p. (unpublished).</ref> Wegelin, 1986; <ref name=ch09r33>Kent, D., M., Haidl, F., M., MacEachern, J., A., 1988, Mississippian oil fields in the northern Williston Basin, in Goolsby, S., M., Longman, M., W., eds., Occurrence and Petrophysical Properties of Carbonate Reservoirs in the Rocky Mountain Region: RMAG Symposium, p. 193–210.</ref> or [[hydrodynamics]]<ref name=ch09r43>Petroleum Research Corporation, 1961, Hydrodynamic exploration for unconformity traps: Research Report A-11, 47 p. (unpublished report, available at Colorado School of Mines Library, Golden, CO).</ref><ref name=ch09r13>Dahlberg, E., C., 1982, Applied [[Hydrodynamics]] in Petroleum Exploration: New York, Springer Verlag, 161 p.</ref><ref name=ch09r24>Hannon, N., 1987, Subsurface water flow patterns in the Canadian sector of the Williston Basin: RMAG 1987 Symposium Guidebook, p. 313–321.</ref> or perhaps both provide the updip, transverse (“lateral”) seal. From producing wells at Weyburn and nearby Steelman, the oil column height appears to be [[length::600 ft]] [[depth::(183 m]]). This raises the next question: Could the Midale Marly beds provide a seal for a 600-ft oil column, or must hydrodynamics be present to augment the seal quality of the Midale Marly beds? | + | This raises the possibility that either a stratigraphic change;<ref name=ch09r70>Winland, H. D., 1972, Oil accumulation in response to pore size changes, Weyburn field, Saskatchewan: Amoco Production Company Report F72-G-25, 20 p. (unpublished).</ref><ref name=ch09r71>Winland, H. D., 1976, Evaluation of gas slippage and pore aperture size in carbonate and sandstone reservoirs: Amoco Production Company Report F76-G-5, 25 p. (unpublished).</ref> Wegelin, 1986; <ref name=ch09r33>Kent, D. M., Haidl, F. M., MacEachern, J. A., 1988, Mississippian oil fields in the northern Williston Basin, in Goolsby, S., M., Longman, M., W., eds., Occurrence and Petrophysical Properties of Carbonate Reservoirs in the Rocky Mountain Region: RMAG Symposium, p. 193–210.</ref> or [[hydrodynamics]]<ref name=ch09r43>Petroleum Research Corporation, 1961, Hydrodynamic exploration for unconformity traps: Research Report A-11, 47 p. (unpublished report, available at Colorado School of Mines Library, Golden, CO).</ref><ref name=ch09r13>Dahlberg, E., C., 1982, Applied [[Hydrodynamics]] in Petroleum Exploration: New York, Springer Verlag, 161 p.</ref><ref name=ch09r24>Hannon, N., 1987, Subsurface water flow patterns in the Canadian sector of the Williston Basin: RMAG 1987 Symposium Guidebook, p. 313–321.</ref> or perhaps both provide the updip, transverse (“lateral”) seal. From producing wells at Weyburn and nearby Steelman, the oil column height appears to be [[length::600 ft]] [[depth::(183 m]]). This raises the next question: Could the Midale Marly beds provide a seal for a 600-ft oil column, or must hydrodynamics be present to augment the seal quality of the Midale Marly beds? |