In the Golfo San Jorge Basin, the fluvio-lacustrine Pozo D-129 Formation is the most important source rock of the basin. In recent years, this formation acquired a significant productive relevance from the tight and hybrid reservoirs from its Upper Section. In the present work, integrated studies help delineate the various reservoirś depositional environment in the western and southern flanks of the CGSJ with a significant contribution from 3D seismic interpretation. Time thickness maps, from the detailed definition of regional horizons associated with the productive levels of the different deposits, assisted in the depositional environment delineation. In this regional interpretation analysis, the productive zone’s location is related to the sedimentary corridors proposed by other authors for the different work areas. Frequency and amplitudeś seismic attributes allow the identification and extraction of geobodies geometries and dimensions, associated with specific depositional processes. The integration of these seismic studies with well data, such as electrical and mud logs, and cores, permitted the generation of reservoir-scale depositional models for this Formation.