TY - BOOK

T1 - Multidimensional basin and petroleum systems modeling in the Molasse Basin, Austria

AU - Gusterhuber, Jürgen

N1 - no embargo

PY - 2014

Y1 - 2014

N2 - Hydrocarbon exploration in the Molasse Basin of Austria has been successful for decades. However, knowledge of the geological evolution and its relation to timing of hydrocarbon generation and migration of the tectonically complex area close to the oil kitchen at the southern edge of the basin was still incoherent. In a first step, a multi-technique approach combining geological, geophysical and geochemical data was applied to assess amount and timing of uplift and erosion events in the basin. Three different events can be distinguished: (1) Tilting of the basin towards the west in the Early Miocene; (2) Extensive regional uplift during the Late Miocene with erosion of sediments 500 to 900 m thick; (3) Local uplift of the eastern part of the study area resulting in additional erosion of sediments up to 1000 m thick. In the second part of the thesis, a two-dimensional petroleum systems model was established based on a structural forward model in the western part of the study area (Salzburg, Upper Austria). Main goal was to investigate the impact of the fold and thrust belt on the petroleum system within and in front of the Perwang imbricates. Present-day heat flow, calibrated with formation temperatures, ranges between 28 and 60 mW/m² and decreases southwards. Maturity data suggest that heat flow was even lower during Miocene times. The postulated sub-recent (Plio-/Pleistocene) increase in heat flow is supported by sensitivity analysis. However, its geological cause is yet not fully understood. Minor hydrocarbon generation (transformation ratio

AB - Hydrocarbon exploration in the Molasse Basin of Austria has been successful for decades. However, knowledge of the geological evolution and its relation to timing of hydrocarbon generation and migration of the tectonically complex area close to the oil kitchen at the southern edge of the basin was still incoherent. In a first step, a multi-technique approach combining geological, geophysical and geochemical data was applied to assess amount and timing of uplift and erosion events in the basin. Three different events can be distinguished: (1) Tilting of the basin towards the west in the Early Miocene; (2) Extensive regional uplift during the Late Miocene with erosion of sediments 500 to 900 m thick; (3) Local uplift of the eastern part of the study area resulting in additional erosion of sediments up to 1000 m thick. In the second part of the thesis, a two-dimensional petroleum systems model was established based on a structural forward model in the western part of the study area (Salzburg, Upper Austria). Main goal was to investigate the impact of the fold and thrust belt on the petroleum system within and in front of the Perwang imbricates. Present-day heat flow, calibrated with formation temperatures, ranges between 28 and 60 mW/m² and decreases southwards. Maturity data suggest that heat flow was even lower during Miocene times. The postulated sub-recent (Plio-/Pleistocene) increase in heat flow is supported by sensitivity analysis. However, its geological cause is yet not fully understood. Minor hydrocarbon generation (transformation ratio

KW - Austrian Molasse Basin

KW - Basin Modeling

KW - Petroleum Systems

KW - Generation

KW - Migration

KW - Fold and Thrust Belt

KW - Imbricated zone

KW - Österreichische Molassezone

KW - Beckenmodellierung

KW - Kohlenwasserstoffsysteme

KW - Generation

KW - Migration

KW - Ueberschiebungsguertel

KW - Schuppenzone

M3 - Doctoral Thesis

ER -