Naslov
Petrophysical modelling of the Upper Pannonian reservoirs in Sava Depression

Autori
Novak Zelenika, Kristina ; Vidaček, Renata ; Ilijaš, Tomislav ; Pavić, Petar

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Geomathematics - present and future of geological modelling / Cvetković, M., Novak Zelenika, K., Horváth, J., Hatvani, I.G. - Zagreb : Hrvatski geološki institut, 2016, 105-112

ISBN
978-953-59036-1-1

Skup
8th Croatian-Hungarian and 19th Hungarian geomathematical congress, Geomathematics - present and future of geological modelling

Mjesto i datum
Trakošćan, Hrvatska, 26.05.2016. - 28.05.2016

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Geostatistics; Ordinary Kriging; Sequential Gaussian Simulations; hydrocarbon

Sažetak
Deterministic methods are still widely used for reservoir characterization and modelling although it is clear that our knowledge about underground cannot be completely known, i.e. without any uncertainty. This is why sometimes stochastic methods can give better solution, since they include uncertainty in their calculations. This paper shows testing of the deterministic (Ordinary Kriging) and stochastic (Sequential Gaussian Simulations) methods for porosity distribution in Lower Pontian hydrocarbon reservoirs in the Sava Depression. Ten realizations were obtained by Sequential Gaussian Simulation. Although 10 realizations is enough only for the rough insight into geological underground uncertainty, the obtained results were satisfied. Areas with the highest uncertainties were well observed in the maps. Many problems in numerical simulation appeared due to high differences in values between neighbour cells. For that reason Ordinary Kriging as a deterministic method was used for the modelling of the same reservoirs. Smooth transitions between neighbour cells eliminated all the numerical modelling problems and Ordinary Kriging maps showed channel sandstone with transitional lithofacies in some reservoirs.

Izvorni jezik
Engleski

Znanstvena područja
Geologija

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