Carbonate reservoir characterization and simulation: From facies to flow units: Report from the March 2004 Hedberg Research Symposium - Feazel, C.T.; Byrnes, A.P.; Honefenger, J.W.; Leibrecht, R.J.; Loucks, R.G.; McCants, S.; Saller, A. (American Association of Petroleum Geologists Bulletin, 2004)