| Abstract [eng] |
The main hydrocarbon sources of Baltic syneclise are related to Cambrian sandstones. There are also hydrocarbon fields in Ordovician and Silurian carbonate rocks. First hydrocarbon modeling in Lithuanian started in XX century last decade. The modeling showed what in western Lithuania oil started to generate in middle Devonian and took place in Cambrian, Ordovician and Silurian deposits. 1D modeling of hydrocarbon generation is vital and in present days, it’s giving basic information about one or another oil and gas fields evolution in Baltic syneclise and nowadays the importance is growing in shale’s gas evaluation. 1D modeling of hydrocarbon generation in Baltic syneclise was performed with software PetroMod. PetroMod petroleum systems modeling software combines seismic, well, and geological information to model the evolution of a sedimentary basin. The software predicts if, and how, a reservoir has been charged with hydrocarbons, including the source and timing of hydrocarbon generation, migration routes, quantities, and hydrocarbon type in the subsurface or at surface conditions. Petroleum systems modeling is a vital component of exploration risk assessment—from basin to prospect. It can be applied during all stages of exploration, from frontier basins with no well control, to well-explored areas and charge assessments of single prospects or fields. The hydrocarbon generation was estimated in 9 well’s: 4 well’s in western northern part of Lithuania, 2 well’s in middle Lithuania, 1 well in western southern part of Lithuania and 2 well’s in Baltic sea. The modeling showed what shale’s from middle part of Lithuania is not prospective for hydrocarbon generation. Western and south western part shale’s of Lithuania are prospective for oil generation and also southwestern part of Baltic Sea. 1D modeling showed what in Baltic syneclise very big importance has hercinical thermal event at 355 to 299 mln. years ago. Modeling showed and other parameters are also important like paleoclimate play a big role in modeling. The modeling indicated what main hydrocarbon generation in Baltic syneclise was in Carboniferous when the hercinical thermal event took place. |
