Tectono-Sedimentary Relationships of the Eastern Venezuela Guarico and Maturin Sub-Basins
FUNES, DIEGO; CELIA A. BEJARANO, FELIPE AUDEMARD, and FREDDY LEON
Regional seismic stratigraphic interpretation in the central area of the Eastern Venezuela Basin, led to the identification of twenty-three seismic sedimentary sequences of Cretaceous to Middle Miocene age.
Well logs and high resolution biostratigraphical calibration, allowed the study of the evolution and tectono-sedimentary relationships of these sequences with the different tectonic pulses that took place during the evolution of the Eastern Venezuela foredeep basin.
The Cretaceous-Paleocene sequences are related to the last events of a passive margin, and they underlain the Oligocene-Middle Miocene sequences associated with the emplacement of the Interior Range (Central Region), which conform the Guarico Sub-basin. Further emplacement of the Interior Range to the East gave rise to a rapid inflection and subduction of the basin, resulting in the development of the Maturin Sub-basin.
The understanding of the tectono-sedimentary relationships of these sub-basins, calibrated with reserve and production data permitted a better definition of the petroleum system and the recommendation of new potential exploratory plays in the area.