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The Istria Basin, part of Western Black Sea (WBS) represents a major tectonic unit of the Romanian Black Sea shelf, with prolific hydrocarbon bearing structures. A significant amount of exploration and development wells were drilled on this basin’s northern edge. Core and cuttings data from 12 boreholes provide important details on this basin and the WBS stratigraphy, especially for the two of the main hydrocarbons bearing deposits Upper Cretaceous and, respectively, Eocene, on which we have achieved an age interp...

The main purpose of this paper is to provide new geological information and interpretation of the well data from the Istria Basin, Western Black Sea. Therefore, we present a reconsideration of the microfaunas (mainly foraminifers) and calcareous nannofossils described from several wells drilled on the Lebada East structure belonging to the Istria Basin, by using core reports. Thus, we have been able to compile integrated information regarding the lithology and biostratigraphy of the wells. We have focused on the s...

Development of passive margin, due to thermal cooling of the stretch lithosphere, creates a large accommodation space subsequently filled with sediments brought from the emerging continent once the river system is established [1]. This combination of rapid subsidence and sedimentation generates an instable architecture with large shelf progradation on top of early post-rift sediments [5]. Given the typical fine grain lithology of these deposits, in most of the cases they become overpressure and an ideally zone for...

The structure of the Romanian Western Black Sea shelf has been studied before 1970 and described in publications that serve today as an important point of reference in the structural geology and geotectonic studies. After the year 2005, a new set of gravimetric data has been acquired by the Romanian National Institute of Marine Geology and Geoecology, that has been obtained by compiling over 13.400 km of profile measurements on the Romanian and Bulgarian offshore. By combining this newer data with an analysis on t...