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GEP-20 Outcrop studies: Fundamental to petroleum reservoir characterization and modeling
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Reservoir characterization of upper cretaceous megabreccias; Examples from outcrops of the monte Sant'Angelo megabreccia, gargano
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Gunnar Sælen, IRIS (Norway)
Per Olav E. Svendsen, University of Bergen (Norway)
Ivar Grunnaleite, IRIS (Norway)
Atle J. Sande, University of Bergen (Norway)
Niels Bo Jensen, IRIS (Norway)
Luigi Spalluto, Universita degli Studi di Bari (Italy)
Michael R. Talbot, University of Bergen (Norway)
Gaetano Osso, Studi & Ricerche Geologiche (Italy)
Nicola Paoli, Studi & Ricerche Geologiche (Italy)
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Outcrops of the Monte Sant'Angelo Megabreccia in Malpasso Valley south of the Mattinata Fault (Gargano; Italy) are predominantly composed of a stacked pile of matrix-supported debrites, whereas in the northern part of the Gargano (Vico del Gargano) the Monte Sant´Angelo Megabreccia is made up of a succession of clast-supported rock falls and debrites in the lower part, clinoforms of matrix-supported debrites in the middle, and a mixture of debrites, high-density turbidites, modified grain-flow deposits and turbidites in the upper part.
The average porosity (arithmetic average) and permeability (geometric average) values of representative core-plug samples from Malpasso Valley are significantly higher compared to those from Vico del Gargano, but the poroperm signatures of clast and matrix samples are not significantly different in either locality. Moreover, the clast- and matrix-supported debrites at Vico apparently do not show significantly different poroperm signatures. We explore the apparent geographic difference in terms of depositional and diagenetic processes, and subsequently perform preliminary reservoir simulation based on bed geometries and poroperm signatures from both localities.
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