Integrated Reservoir Characterization and Petrophysical Assessment of the Kurra Chine Formation in the Peshkhabir Oil Field, Northern Iraq

The Kurra Chine Formation, a Triassic unit, is a prominent unit in the subsurface of northern Iraq and a key target for hydrocarbon exploration because of its complex lithology and reservoir potential. However, few studies have fully characterized its petrophysical properties and reservoir quality, necessitating further investigation. This research aims to enhance understanding of the formation’s hydrocarbon potential by conducting a comprehensive reservoir characterization and petrophysical evaluation at Peshkhabir Well-6 (PKH-6). To achieve this goal, an integrated approach was employed, combining wireline log interpretation, core sample analysis, and petrographic analysis. The total thickness of the formation is 546 m, with key reservoir intervals exhibiting an average shale volume of 9%. Lithologic analysis indicates dolomite, anhydrite, shale, limestone, and sandstone, with dolomite identified as the primary flow unit. Petrophysical evaluation indicates an average effective porosity of 6%, permeability reaching 24 mD, and average water and hydrocarbon saturation of 21% and 79%, respectively. Petrographic observations confirmed hydrocarbon-filled pores, reinforcing the viability of the formation as a productive reservoir. These findings offer new insights into the reservoir quality, hydrocarbon distribution, and flow characteristics of the Kurra Chine Formation, contributing to improved exploration and field development strategies for Triassic reservoirs in northern Iraq.