Karboński etap rozwoju basenu lubelskiego jako główne stadium generacji węglowodorów w utworach młodszego paleozoiku Lubelszczyzny — wyniki modelowań geologicznych (PetroMod)

Abstract

CARBONIFEROUS TIME IN THE EVOLUTION OF THE LUBLIN BASIN AS THE MAIN HYDROCARBON FORMATION STAGE IN THE LUBLIN AREA – RESULTS OF THE GEOLOGICAL MODELLING (PETROMOD) Summary One of the petroleum play elements is to determine organic matter maturity zones. In the case of hydrocarbon exploration in the Lublin area it mainly pertains to Devonian and Carboniferous deposits. Geological knowledge of local of stratigraphy, lithology, subsidence and erosion rates enables to provide data for computer modelling. The knowledge of calibrating parameters (e.g.) present temperatures, values of the vitrinite reflectance and CAI) is here also satisfactory. Results of the computer modelling (PetroMod) made possible to prepare the map of heat flow values for the Middle to Upper Devonian and Carboniferous period. These values are very high (90–130 mW/m2) and can be comparable to the magnitude of the heat flow in rift zones. Correctness of the obtained results was confirmed by investigations on homogenization temperatures of cement inclusions in the Devonian and Carboniferous rocks. Evolution of the organic matter maturity in the Lublin area obtained as result of computer–aided simulations (PetroMod) shows that Carboniferous stage of the basin formation was the main phase for oil and gas generation. The reorganization of the Lublin Basin into the Lublin Synclinorium which in turn became included in the Polish Basin at the Late Jurassic time did not influence crucially the hydrocarbon generation in the Devonian and Carboniferous deposits. Present distribution of the organic matter maturity zones indicates that Devonian rocks are in the most cases overmature whereas the Carboniferous ones are in the oil and gas window. The planning of further exploration should take into account also results of the hydrocarbon generation modelling in the Lublin area.