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Sensitivity maturity analysis is being used mostly in finding the best fitting parameters for thermal modeling. The sensitivity of the models in Beglej- Kalenik area demonstrates the importance of heat flow history - subject to uncertainty due to complicated geology. The specific analysis includes patterns based on two models (complex and constant), which responses are studied with respect to possible variations. The paper is focused on the conducting sensitivity analysis of sediment thermal maturity, applying dif...

Vitrinite reflectance (\%Ro) analysis is the major method in definition of thermal maturity of sediments. The rock katagenetic alterations can also delineate the thermal history of well sections, structures, zones and sedimentary basins as shown in this case study for North Bulgaria. The well R-1 Dragana data modeling visualizes a local heat flow, temperature and vitrinite reflectance distribution in geological time. Additionally, the geohistory analyses define the exact period of oil and gas generation from persp...