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GEOLOGICAL AND SEISMIC FEATURES OF THE NORTHERN PART OF CROATIAN OFFSHORE AND KVARNER AREA

This study presents an overview of structural and stratigraphic relationships of the northern part of Croatian offshore and Kvarner area. The availability of a large 2D seismic dataset covering the area, integrated by three boreholes and one sonic log allowed a good correlation between sedimentary units and seismic facies highlighted on the profiles. Despite intensive geological and geophysical exploration during the past few decades, there is a lack of published work on seismic facies analysis and structural framework in this area. The present geological understanding in the part of a wider Dinaric and Adriatic area is mostly related to the studies conducted on the onshore (GKSFRJ, 1970 ; Vlahović et al., 2005 ; GKHR, 2009 ; Korbar, 2009 and references therein), or by integration of offshore seismic and well data (Đurasek et al., 1981 ; Prelogović, 1995 ; Grandić et al., 1999, 2001 ; Del Ben, 2002). However, majority of publication deals with southern Croatian (Prtoljan et al., 2007 ; Wrigley et al., 2012) and other with Italian part of Adriatic offshore area (Finetti, 2005 ; Busetti et al., 2010 ; Cazzini et al., 2015). Therefore, this study aims to give a geological meaning to main reflectors and compare them with onshore units by integration of interpreted structural framework. This was achieved by synthetic seismogram generation, while some seismic attributes were used to improve fault detection and better recognition of some deep reflectors, particularly the Top Triassic clastites/base Carbonates.

seismic interpretation, Kvarner, Adriatic, seismic facies, structures, Dinarides

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