Characterization of the Carbonate Reservoir Unit A of the Upper Triassic Kurra Chine Formation in the well SH-4, Shaikan Oilfield, Iraqi Kurdistan Region, Using Wireline Log Data

Unit A of Kurra Chine Formation has been studied in the well Shaikan - 4 (SH-4) at Oilfield Northern Iraqi Kurdistan Region. The available conventional wireline log data and existed core test values have used to characterize reservoir properties unit determine flow efficiency reservoired fluids. dolomite anhydrite dominated lithology contains low percentages shale except upper most part which content exceeds 30%. porosity is less than 5% parts secondary comprises 4% total some horizons. consists primly Illite Chlorite distributes a dispersed pattern. Hydrocarbons are exist almost along saturations exceeding 70% middle lower unit. No effective permeable intervals observed unit, whereas zones greater 70mD part. Three units distinguished based on variations content, porosity, permeability. four distinctive types Hydraulic Flow Units (HFU) 2.0, 20-5.5, 5.5-10, 10 Zone Indicator (FZI) values. calculated net gross pay ratio for appeared be about 28% representing collective 52m 184m thickness Unit.