Non-Conventional Plays in Romania: the Experience of OMV Petrom
2012
This paper describes the key findings of a regional study that targeted the unconventional potential of exploration assets hold
by OMV Petrom in Romania. Three unconventional plays have been evaluated, including the (1) Silurian and (2) the Dogger
on the East European Margin (including Moesia), and the (3) Oligocene in Maramures (Pienides). The Silurian shales are at 2-
4 km depth in the gas window on Western-Central Moesia. Maturity in most cases has been reached by the Late Paleozoic and
it was followed by significant exhumation during the Hercynian Orogeny. The quality of Silurian shale represents a major
uncertainty, due to the sparse dataset represented by old wells. The Dogger shales of Northern Moesia are in the oil and gas
window under the most external thrusts of the Carpathians at depths that exceed 4 km. The shales have TOC values up to 6 %.
Oligocene shales with TOC of up to 10 % in Maramures are in the oil window at depths of less than 2 km. This makes them a
very attractive target for shale-oil exploration. However, major setbacks are the complex tectonic structure, rugged topography
and large-scale exhumation. Ongoing exploration efforts for non-conventional plays are targeted to define the mechanical
properties and the exploration sweet spots in the above mentioned plays, but also assessing the potential of the Late Paleozoic
bituminous dolomites of Moesia and other black shales in the Carpathians.
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