Integrating seismic and frequency analysis for reservoir characterization in a structurally complex onshore field

Reservoir characterization of structurally complex onshore fields is an area that plays a key role and requires an integrated approach to address challenges such as fault compartmentalization, well location uncertainty, and seismic resolution limitations. The studied oil field (MSH) is located in the southwestern Macuspana Basin, Mexico, and presented significant seismic interpretation challenges due to its complex structure and limited seismic data quality. The interpretation was based on a 3D seismic dataset calibrated with borehole data and a frequency analysis widowed in time, to improve stratigraphic and structural understanding. Synthetic seismograms were integrated to refine reservoir unit definition and optimize depth-converted velocity models. The work demonstrated the importance of multidisciplinary integration to maximize the reliability of seismic interpretation, especially in projects with limited budgets and timelines. Similar seismic resolution and structural complexity challenges impact exploration and development strategies for reservoirs worldwide, such as the Permian Basin and Wilcox Trend. The studied reservoirs share key features with the Wilcox Trend in the Gulf of Mexico, where complex stratigraphic and structural traps, low seismic resolution, and challenges in reservoir characterization are common. The application of multidisciplinary techniques strengthens decision-making for resource optimization in both mature and unconventional reservoirs, with seismic studies serving as the foundation for achieving optimal results. Previous studies have highlighted the importance of integrating well data and velocity modeling to optimize seismic imaging in complex basins. Figure 1: Structural map of the field with fault interpretation.