Geodynamic reconstruction of offshore eastern Tunisia during the Cretaceous and Paleogene periods and its impact on hydrocarbon exploration.

The analyses of structural, seismostratigraphic patterns and seismic anomalies were conducted using borehole and two-dimensional (2-D) seismic data to reconstruct the geodynamic evolution of offshore eastern Tunisia from the Cretaceous to the Paleogene times. Thirteen third-order sequences (S1 to S13) were identified, and several hiatuses were recognized, which were most likely related to the tectonic event associated with the convergence between Eurasian and African plates. Aptian buildups have also been recognized in the outer platform margin. The growth and distribution of these reefs are controlled by the uplift of fault blocks responsible for the relative sea-level fall which led to sub-aerial exposure and the development of a karstified carbonate platform. The structural features and the major tectonic events as well as the stratigraphic pattern, recognized in offshore eastern Tunisia, are related to the geodynamic evolution of the North African and western Mediterranean basins. The identification of several undrilled reef buildups with significant hydrocarbon potential could replenish the operators' portfolio. • Geodynamic evolution of offshore eastern Tunisia from Cretaceous to Paleogene times • Identification and modeling of geological hiatuses and seismic anomalies • Hydrocarbon potential [ABSTRACT FROM AUTHOR]