The main objective of this paper is to present tectonic deep Sava depression structural events in order to provide information about different sedimentation environments and to point out approach for possible remaining hydrocarbon traps. The 3D area of investigation is settled in Sava depression along the southern margin of the Pannonian basin (Figure 1). This is the area of small but numerous oil and gas fields . Due its position the structural features are mainly due to regional tectonic. The reservoir rocks are mostly Miocene sandstones but some hydrocarbons occur on the uplifted edges and weathered top of the Paleozoic basement. Reservoir rocks in the Lower Miocene (Ottnangian stage) are coarse grained clastics (conglomeratic sandstones and conglomerates). The most frequent reservoirs in the Upper Miocene (Pannonian stage) are coarse-grained clastics (conglomeratic sandstones and conglomerates). The fields were discovered 30 years ago and although a long period of time has elapsed since discovery, because od their geological complexity the area is still the subject of detailed geological studies. According to seismic structural interpretation, palinspastic ,thickness maps construction, and well data incorporation new insight into the Sava Depression is given.


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