## 2 Location of Research Area  
The study area is located in quite a well-recognized region of the Raczyna and the Jodowka gas deposits [27], south of Jaroslaw city, in the Fore-Carpathian District. The PreSDM procedure was tested along a fragment of the POLCRUST Trans-Carpathian Seismic Profile [7; 24; 25]. Datasets acquired from this profile were reprocessed within the two research projects co-financed by the POGC and the National Centre for Research and Development. The INGA 2 project aimed to improve seismic imaging in the areas of the Carpathian Overthrust and the Carpathian Foredeep (M-5 traverse). The precise location of the study area is depicted in Figure 1 in connection with the structural map of the Miocene formations' basement, which was interpreted based on both 2D and 3D seismic sections [27]. Additionally, the map contains the localization of the most important wells, which provided data used in analyses as well as the ranges of reservoir rocks in both the Raczyna and the Jodowka areas. The seismic data processing was focused on analyzing the Middle Miocene autochthonous sediments (Figure 2A,B--No. \"2\"), which correspond with the described Raczyna and Jodowka gas deposits [27]. The geological structure of the study area was illustrated through the interpretation of two archival seismic profiles crossing the Miocene autochthonous sediments, which are natural reservoirs for the Raczyna and Jodowka gas deposits. The autochthonous Miocene formations directly cover the highly varied, erosional top surface of the Precambrian basement immediately beneath the Carpathian-Stebnik Overthrust. The development of sedimentary formations infilling the Foredeep was strongly influenced by the paleorelief of the Precambrian basement top surface (Figure 2A,B--No. \"3\") dominated by deeply incised river palevolleys. Similar to analyzed Miocene formations, the geometry of the sub-Moicene basement was finally shaped by thrusting movements of both the Flysch Carpathian nappes and the allochthonous Stebnik Unit (Figure 2A,B--No. \"1\") [27; 28]. Most part of the study area was covered by the sediments involved in the Carpathian-Stebnik Overthrust (Figure 2A,B--No. \"1\"). The Precambrian formations extended throughout the study area provided the basement of deposition of Miocene formations, which infill the Carpathian Foredeep [28]. These three structural stages are temporarily and spatially interrelated due to the dynamics of the development of the Carpathian Foredeep eastern segment [27; 29]. In the study area, the Precambrian is represented by low-grade-metamorphosed (phyllitized) clay tones and mudstones sporadically intercalated by quartzites and quartzitic sandstones. All these sediments show high dip angles, which indicates strong tectonic activity whereas the erosional, morphologically varied Precambrian top surface dips generally to the south [27; 28; 29]. This top surface is directly covered by autochthonous Miocene formations (Figure 2A,B--No. \"2\"), which leveled the relief. The Miocene formations represent the Lower Badenian (Baranow Beds), the Upper Badenian (including the evaporites) and the Sarmatian (the youngest unit of the autochthonous Miocene succession) [27; 28]. The formations comprise clayey-silty shales with fine-grained sandstones. Less common are fine-grained sandstones interbedded by shales. The Carpathian Overthrust (Figure 2A,B--No. \"1\") involved sediments of various ages but, due to the similarity of their tectonic styles, all are presented together. The Stebnik Unit, which underlies the sediments involved in the Carpathian Overthrust structure, comprises shales and mudstones intercalated by sandstones and minor conglomerates. In the bottom parts of this succession, thicker horizons of anhydites, gypsums and halites are observed.