Abstract
Petroleum companies have been exploring the Vienna Basin for oil and gas for nearly 100 years. OMV owns two Austrian concession areas since the early 1960ies: the Waschberg Zone (with the Flysch and Molasse) and the Austrian part of the Vienna Basin. The exploration areas are vertically divided into three levels: level 1 with Neogene strata (Miocene sediments), level 2 holding units formed during alpine orogeny (Calcareous Alps and Flysch) and level 3 representing the autochthonous units of the European basement. Level 2 and 3 are summarized as Pre-Neogene. The geological and tectonic setting for each of these three levels is diverse with a different age, style of deformation, and lithology; hence the methodology and strategy of exploration is adapted to each level. For level 1, the Miocene strata, 3D seismic interpretation, seismic attributes and sequence stratigraphy are standard tools for exploration. In contrast, for the Pre- Neogene (level 2 & 3) geological and structural modelling are more important and seismic interpretation is applicable for structural mapping only due to medium or poor quality of seismic data.
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