Oil Shale Grade Variability in Close-Spaced Core Holes in the Mahogany Zone of the Colony Shale Oil Project Area
18th Oil Shale Symposium, Grand Junction, Colorado, April 1985 Authors: H. A. Perry (Exxon Company, U.S.A.), and C. E. Brechtel and M. P. Hardy (AAI) Fourteen close-spaced core holes were drilled [...]