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E004 POROSITY DIFFERENTIATION WITHIN INTERBEDDED LIMESTONE-DOLOSTONE RESERVOIRS 1 S. N. EHRENBERG 1 G. P. EBERLI 2 M. KERAMATI 3 AND A. MOALLEMI 3 1 Statoil N-4035 Stavanger Norway [email protected] 2 Comparative Sedimentology Laboratory University of Miami USA 3 Research Institute of Petroleum Industry Tehran Iran We have observed that interbedded limestones and dolostones in 3 deeply buried carbonate platforms have very different porosity frequency distributions with the limestones being tighter and asymmetrically "heaped" against the limit of zero porosity. Comparison with data from younger shallowly buried carbonates suggests that the above contrast originated mainly due to the greater resistance of