Abstract
The Oxbow-Carnduff field of southeastern Saskatchewan emphasizes the need of detailed lithological studies in evaluating a reservoir. A critical comparison of routine core analysis and detailed core studies in the field shows that a substantial percentage of the reservoir unit, which has porosity and permeability above a reasonable lower cut-off, is ineffective and unstained. The effective pay within the unit is determined not only by its porosity and permeability but also by the grain size of the carbonate. This example points out the need of full use of core examination in conjunction with core analysis in the evaluation of a reservoir. End_of_Article - Last_Page 1102------------
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