Sedimentary Characteristics and Basin Evolution of a Compartmentalized Foreland Basin—Internal Ionian Zone, Western Greece

Ioannis Vakalas (), Efthymios Tripsanas, Constantinos Tzimeas and Panagiotis Konstantopoulos
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Ioannis Vakalas: School of Mining and Metallurgical Engineering, Department of Geological Sciences, National Technical University of Athens, Iroon Polytechniou 9 Str., Zografou Campus, 15773 Athens, Greece
Efthymios Tripsanas: HELPE Upstream S.A., Helleniq Energy Holdings S.A., 15125 Athens, Greece
Constantinos Tzimeas: Freelance Exploration Geophysicist, 4 Platonos Str., 15121 Ano Pefki, Greece
Panagiotis Konstantopoulos: Energean Oil & Gas, 32, Kifissias Avenue, Atrina Center, 15125 Marousi, Greece

Energies, 2024, vol. 17, issue 2, 1-38

Abstract: This study is based on the detailed sedimentological analysis of eleven sections and one well through the late Eocene–Oligocene flysch formation of the Internal Ionian Zone (IIZ) in Western Greece. The sections are spread from the northern parts of Epirus to the north and Aitolokarnania to the south. Sedimentological data combined with biostratigraphic analyses resulted in a five-stage evolutionary model for the basin. Unit I corresponds to the lower part of the examined sections, indicating the onset of clastic sedimentation. Regarding depositional environments, it is regarded as a basin plain where lobe distal fringe accumulations occur. Unit II consists almost exclusively of heterolithic facies, marking the advance of a lobe complex system. Massive sandstone facies dominate unit III and can be considered a more proximal submarine fan system. Unit IV reflects a calm period of the basin, where mud-dominated heterolithics and hemipelagic mudstones were deposited. Hemipelagic mudstone facies with intervals of heterolithics, conglomerates, and deformed and massive sandstone facies characterize unit V. The architecture resembles a slope system incised by canyons and channels. The sand-rich intervals in Units III and V could act as the most favorable reservoir levels. In contrast, the sand-rich intervals in Unit II are considered less promising due to their higher heterogeneity.

Keywords: submarine fans; foreland basin; Ionian zone; reservoir evaluation; Western Greece (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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