Document Type : Review Paper


Geology Department, University of Basrah-Iraq, Basra


Hydrocarbon exploration and production heavily rely on understanding the petrophysical properties and spatial distribution of reservoir rocks. This study delves into an in-depth analysis of the AB unit's petrophysical attributes, with a specific focus on its spatial distribution and lithological identification. The research encompasses a comprehensive investigation of essential petrophysical properties, including porosity, permeability, and fluid saturation, shedding light on their significance in effective reservoir evaluation and optimized hydrocarbon extraction. By harnessing the power of well logs, encompassing gamma-ray, resistivity, density, and neutron logs, we unravel the intricate nature of the AB unit's petrophysical characteristics. This comprehensive characterization is further corroborated and validated through rigorous statistical analysis. Moreover, an exploration into the spatial distribution of these petrophysical attributes is undertaken, employing the sophisticated geostatistical technique known as Ordinary Kriging. The results of this analysis reveal distinct patterns of porosity, permeability, and lithology, providing valuable insights for reservoir management and decision-making. The findings of this study contribute significantly to a holistic understanding of the AB unit's reservoir potential, thereby guiding prudent exploration, production, and development strategies. Results showed that most reservoirs contain hydrocarbons. Porosity throughout the reservoirs ranged from 0.06 to 0.20; permeability ranged from 1.58 to 624.34md; and average hydrocarbon saturation was 68.14%. These findings point to a reservoir system with a significant hydrocarbon potential and acceptable performance for hydrocarbon production.