Offshore Greece seismic data review ahead of licensing round
PGS says the first fasttrack datasets are available from its newly acquired 2D multi-client data offshore western and southern Greece.
LONDON–PGS says the first fasttrack datasets are available from its newly acquired 2D multi-client data offshore western and southern Greece. This was co-commissioned by the Hellenic Republic Ministry of Environment, Energy, and Climate Change.
The aims of the acquisition program were to improve understanding of the regional structure and depositional basins and identify petroleum systems. PGS acquired 12,500 km (7,767 mi) of new data acquisition using its GeoStreamer technology, which removes both receiver and source ghosts. Other available data include 6,000 line km (3,728 mi) vintage data re-processing that will be combined into a regional interpretation.
Main focus of the new program is on three areas. The northern area is a grid of lines in the Ionian Sea over the Pre-Apulian zone – an extension of the Southern Adriatic carbonate platform with late Cretaceous – Eocene carbonates overlain by a thick Oligocene shale seal and Mio-Pliocene clastics on top.
These are thought to be analogous to productive fractured carbonate reservoirs of the central Adriatic to the north offshore Italy and Albania. To the south, there is a loose grid of lines around theKatakolon discovery, an area of the Ionian zone analogous to the oil fields onshore Albania.
Previous drilling throughout this zone stopped at or before the Triassic evaporates, which are overlain by thick Mesozoic carbonates and Tertiary clastics. Imaging here will focus on Eocene to Cretaceous analogues for Katakolon and the Triassic evaporates, characterized by halite, gypsum, and anhydrite interbedded with dolomites and thin organic rich shales.
South of the island of Crete in the Libyan Sea, the grid of lines are expected to reveal the Neogene accretionary wedge that forms the Mediterranean ridge and the extent, thickness and continuity of the Messinian evaporate coverage.