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Midale seal capacity and trap type (view source)
Revision as of 21:27, 22 July 2014
, 21:27, 22 July 2014no edit summary
==Significance of r<sub>bt</sub> for seal capacity==
==Significance of r<sub>bt</sub> for seal capacity==
Midale Marly beds are universally accepted as being the top seal for this accumulation. They are essentially the same facies as the Midale Vuggy beds, analyzed here as a possible updip seal. This study shows the updip change in pore throat sizes could account for 280–890 ft (95–298 m) of oil column. The column height shown from producing wells at Weyburn and nearby Steelman fields is [[length::600 ft]]. We are left with two possible conclusions:
Midale Marly beds are universally accepted as being the top seal for this [[accumulation]]. They are essentially the same facies as the Midale Vuggy beds, analyzed here as a possible updip seal. This study shows the updip change in pore throat sizes could account for 280–890 ft (95–298 m) of oil column. The column height shown from producing wells at Weyburn and nearby Steelman fields is [[length::600 ft]]. We are left with two possible conclusions:
* If the estimate of oil column height using R<sub>bt</sub> from the Winland r<sub>10</sub> equation is correct, the Midale Marly beds do not have the capacity from their capillary properties to seal the column of oil shared by Weyburn and Steelman. Weyburn is a hydrodynamic trap or a combination hydrodynamic–[[stratigraphic trap]].
* If the estimate of oil column height using R<sub>bt</sub> from the Winland r<sub>10</sub> equation is correct, the Midale Marly beds do not have the capacity from their capillary properties to seal the column of oil shared by Weyburn and Steelman. Weyburn is a hydrodynamic trap or a combination hydrodynamic–[[stratigraphic trap]].