RT Journal Article ID 4793d3e10728e358 A1 Abedini, Ali A1 Torabi, Farshid A1 Tontiwachwuthikul, Paitoon T1 ROCK TYPE DETERMINATION OF A CARBONATE RESERVOIR USING VARIOUS APPROACHES: A CASE STUDY JF Special Topics & Reviews in Porous Media: An International Journal JO STRPM YR 2011 FD 2011-11-22 VO 2 IS 4 SP 293 OP 300 K1 rock type K1 capillary pressure K1 J-function K1 Winland R35 K1 flow zone indicator K1 discrete rock type K1 permeability K1 porosity AB Reservoir rock type determination is one of the main parameters for simulation and prediction of the hydrocarbon reservoir behavior. Hence it is of great importance to use a method that is capable of determining the rock type accurately. In this study, some of the most useful methods, such as capillary pressure, Leverett dimensionless J-function, Winland R35 method, flow zone indicator (FZI), and discrete rock type (DRT), were applied to samples from a carbonate reservoir to determine the various reservoir rock types. The sample set consisted of 265 routine core data and 18 data sets of capillary pressure versus initial water saturation; all were analyzed using the aforementioned determination methods. Results of this study showed that both capillary pressure and Winland R35 were not accurate enough to determine rock types for this carbonate reservoir, mainly because of the high heterogeneity in the reservoir rock properties. For the same reason, the Leverett J-function method was found to be problematic in normalizing all the capillary data into one unique curve. However, FZI and DRT methods successfully classified all data into four discrete rock types, while satisfying the relationships between permeability and porosity for each of them. The calculated permeability data for each rock type classified by FZI and DRT methods were in good agreement with core permeability data. PB Begell House LK https://www.dl.begellhouse.com/journals/3d21681c18f5b5e7,604719a84cd61694,4793d3e10728e358.html