b arbab - petroleum department iranian offshore oil company IOOC
h yadegari - international affairs and technological division
m tadayoni - corporate planning directorate

this paper explains a case study of heavy oil carbonate reservoir sarvak formation in one of the field south of iran . One accomplishment in this processing is good agreement of porosity and permeability profile between CMR logs and core data.CMR log has been able to determine independent porosity , heavy oil identification , permeability , pore size and geometry variations. this reservoir was divided into 2 parts (lower and upper sarvak). the three3 and four rock types and flow units were defined for upper and lower sarvak respectively . these rocks types were distinguished by relationship between logs data , routine and special core analysis and good reservoir has comprised limestones facies with interparticles and vuggy porosity.