27257c58-9906-4225-bc9f-05be03fa7def urn:uuid eng UTF-8 nonGeographicDataset nonGeographicDataset 2025-10-17T05:07:50 creation ISO 19115 2016 Compositional Kinetics for the Lower Cretaceous Eumeralla Formation, Otway Group, Otway Basin, Australia 27257c58-9906-4225-bc9f-05be03fa7def Geoscience Australia currently uses two commercial petroleum system modelling software packages, PetroMod https://www.software.slb.com/products/petromod and Zetaware http://www.zetaware.com, to undertake burial and thermal history modelling on wells in Australian sedimentary basins. From the integration of geological (age-based sedimentary packages, uplift and erosional events), petrophysical (porosity, permeability, and thermal conductivity) and thermal (downhole temperature, heat flow, vitrinite reflectance, and Tmax) input data, to name the most significant, a best-fit model of the time-temperature history is generated. Since the transformation of sedimentary organic matter (kerogen) into petroleum (oil and gas) is a chemical reaction, it is governed by chemical kinetics i.e. time and temperature (in the geological setting, pressure is of secondary importance). Thus, the use of chemical kinetics associated with a formation-specific, immature potential source rock (where available) from the basin of interest is considered a better practical approach rather than relying on software kinetic defaults, which are generally based on the chemical kinetics determined experimentally on Northern Hemisphere organic matter types. As part of the Offshore Energy Systems program hydrocarbons from the Lower Cretaceous Eumeralla Formation were selected where available from onshore wells; compositional kinetics (1-, 2-, 4- and 14-component (phase) kinetics) were undertaken by GeoS4, Germany. The phase kinetics approach is outlined in Appendix 1. This report provides the compositional kinetics for potential source rocks from the Lower Cretaceous Otway Group, Otway Basin, Australia. The kinetic data were used in the offshore petroleum system modelling reported in Schenk et al. (2021). {"type": "Polygon", "coordinates": [[[129.0, -39.0], [141.0, -39.0], [141.0, -26.0], [129.0, -26.0], [129.0, -39.0]]]} 129.0 141.0 -39.0 -26.0 Bulk kinetics Compositional Kinetics Exploration Geochemistry Offshore Energy Systems Organic Geochemistry Otway Basin Published_External Download Record (pdf) [1.6 ] documentDigital Download Record (pdf) [1.6 ] PDF Download Appendix 2 (xls) [129 KB] documentDigital Download Appendix 2 (xls) [129 KB] XLS