Reservoir characterization is a comprehensive process in the oil and gas industry that involves understanding and defining the properties of subsurface reservoirs. This multidisciplinary approach combines geological, geophysical, and petrophysical data to create a detailed model of the reservoir's composition, structure, and fluid properties. Seismic surveys, well logs, and core samples are key data sources used in reservoir characterization to delineate geological formations, identify hydrocarbon-bearing zones, and assess rock properties. Advanced techniques, such as 3D seismic imaging and electromagnetic surveys, contribute to high-resolution reservoir imaging. The analysis of well logs helps determine petrophysical properties like porosity, permeability, and fluid saturations. Reservoir characterization also considers reservoir heterogeneity and anisotropy, critical factors influencing fluid flow behavior. Geostatistical methods and reservoir modeling software assist in integrating diverse data sets to create accurate reservoir models. The resulting models aid reservoir engineers in optimizing recovery strategies, well placement, and field development plans. Continuous advancements in technology, including machine learning and artificial intelligence, are applied to refine reservoir characterization, enhancing the accuracy of predictions and decisions in the exploration and production phases.