Informace o publikaci
Petroleum system modeling in the Baltic basin
| Název česky | Modelování uhlovodíkových systémů v Baltické pánvi |
|---|---|
| Autoři | |
| Rok publikování | 2015 |
| Druh | Konferenční abstrakty |
| Fakulta / Pracoviště MU | |
| Citace | |
| Popis | The main aim of basin modeling in the Baltic Basin was to simulate source rock properties of upper Cambrian, upper Ordovician and lower Silurian rock formations using alternative scenario-testing approach to the erosional and heat flow history. Additional, important point of the modeling was determination of the conventional and/or unconventional hydrocarbon resources which might gives reliable numbers related to any hydrocarbon potential assigned to the lower Paleozoic strata. Integrated basin modeling was applied in the onshore area of the Baltic Basin in northern part of Poland. Presented study brings relatively fresh observation on burial history of several rock units in these Paleozoic strata and several improvements in heat flow scenario. Geological profile begins by crystalline basement represented by igneous and metamorphic rocks. The basement surface is confirmed from several deep boreholes and interpreted from seismic profiles. Sedimentary profile begins with Ediacaran sandstones. Thickness of overlaying Paleozoic sequences fluctuates in wide range of values from 1800 m in the Gdansk borehole up to 3000 m in the Koscierzyna borehole. Thickness of the Mesozoic strata also significantly varies from one location to another in the range of 460-1400 m. Petrophysical parameters of the Paleozoic cover typical for conventional play can be only found in the middle Cambrian sandstones. Potential unconventional play is exclusively related with source rocks beds. Rock-Eval pyrolysis and vitrinite reflectance measurements were performed in order to determine the thermal maturity of the studied sediments. In total, a few hundred samples from 5 boreholes were analyzed for this study. The present-day borehole temperature, vitrinite reflectance and maximum pyrolysis temperature were used for verification of reliability and 1D calibration of the model. Input parameters for modeling were interpreted from original boreholes description and a few seismic profiles. Application of thermal modeling suggest maximum paleo-temperature of about 150-160°C for top of crystalline basement. The varied distribution of vitrinite reflectance with depth is interpreted as a result of variable heat flow over Paleozoic and a few erosion events. The amount of uplift and denudation strongly depends on location and fluctuates between 1000 m to the north-east to 2000 m to the south-west. |