Reservoir Characterization of the Sarmord Formation from Selected Wells in the Kirkuk and Khabbaz Oil Fields, Kirkuk Area, Northern Iraq

The Sarmord Formation’s reservoir characteristics from the K-229 and KZ-14 wells were studied. According to Gamma-ray log data, the formation at KZ-14 has high shale content, especially at the upper part, and the rest of the formation has low shale intervals, while the uppermost part of the formation has higher shale volume and downward indicating shaly and shale zones at the K-229 well. Utilizing Sonic, Density, and Neutron logs data, porosity estimates in both wells are consistently below 10% and 15%, respectively. Porosity increases near the upper part of the Sarmord Formation. Good permeability along RU-1 and RU-2 at KZ-14 and K-229 wells were defined, respectively. The formation is divided into three reservoir units according to permeability, porosity, and shale content. RU-1 in the K-229 well and RU-2 in the KZ-14 well possess the least reservoir quality. The most potential reservoir appeared within RU-1 in KZ-14 well and RU-2 in K-229 well. Moreover, residual hydrocarbons were detected, while horizons of RU-1 and RU-2 at the KZ-14 and K-229 wells reveal portions of the moveable type. The formation at the KZ-14 well had less water saturation than in the K-229 well. All reservoir units are not highly productive. Additionally, fracture flow integrated matrix flow is the primary factor that affects the fluid flow of the Sarmord Formation. The formation in K-229 well includes classes 1 and 2 rock fabric; however, all three classes were identified at the KZ-14 well. As compared to the KZ-14 well, the formation at the K-229 well has a greater pore throat size dispersion.