摘要：Two-di men sional mod el ling of hy dro car bon gen er a tion, ex pul sion, mi gra tion and ac cu mu la tion pro - cesses in SE Po land be tween Tarnów and Rzeszów was car ried out for five source rock ho ri zons, i.e. the Or do - vi cian, Si lu rian, Mid dle De vo nian–Lower Car bon if er ous car bon ates, Lower Car bon if er ous clastics, and Mid dle Ju ras sic. Five cross-sec tions in the study area allowed the re con struc tion of tim ing and range of petro leum pro cesses. The best source rocks re lated to the Or do vi cian and Si lu rian shales and mudstones reached “oil win dow” ma tu rity within the en tire study area and lo cally also reached the “gas win dow”. Gen er a tion of hydro - car bons was ob served from all five source rocks, but the Or do vi cian and Si lu rian source rocks gen er ated two and three times more hy dro car bons than the Lower Car bon if er ous and Ju ras sic source rocks, respec tively. Ex pul sion took place only in case of the Lower Palaeozoic source rocks, but the vol ume of ex pelled hydro car bons dif fered across the area. Hydro car bons mi grated from the Or do vi cian and Si lu rian source rocks to the Up per Ju ras sic (car bon ates) and Up per Cre ta ceous (sand stones) res er voirs or to the Up per Palaeozoic car bon ates in con nec tion with the em place ment of the Carpathian thrust belt dur ing the Mio cene. Faults formed main mi gra tion path ways and hydro car bons ac cu mu lated in struc tural and strati graphic traps, lo cated in the vi cin ity of faults. In places, traps are as so ci ated with a deep Mio cene ero sion sur face. The on set of hydro car bon gen er a tion took place dur ing the Neo gene, mainly the Mio cene, but in the north, gen er a tion and ex pul sion started ear lier – at the end of the Me so zoic.
