SCA2002-48 1/6 ELECTRICAL AND PETROPHYSICAL PROPERTIES OF SHU’AIBA RESERVOIR, SAUDI ARABIA

Electrical parameters are of great importance to interpreting electrical logs and delineating hydrocarbon saturations in reservoir rocks. The applicability of these parameters in reservoir calculations is, in many cases, reservoir specific. Therefore, it is imperative that determination of these parameters in the laboratory should be conducted on selective core samples that represent the distinctive rock types and geologic facies. An experimental program has been conducted to determine the electrical and petrophysical parameters of Shu’aiba carbonate reservoir, which is located in southeastern Saudi Arabia. Shu’aiba reservoir is a heterogeneous carbonate formation with various facies due to digenetic alteration of the original rock fabric. The measured electrical and petrophysical properties include formation resistivity factor FRF, cementation exponent m, saturation exponent n, porosity φ, permeability K, capillary pressure Pc, and irreducible water saturation Swir. The results revealed that changes in electrical parameters are accompanied by changes in rock type and geologic facies. When combined with conventional hydraulic radii models and NMR surface area models additional information for characterization and correlation is obtained