Geoscience Poster G16: Potential field interpretation and modelling in the deep-water Otway Basin
Yvette H. Poudjom Djomani A *A Geoscience Australia, Canberra, ACT, Australia.
The APPEA Journal 62 - https://doi.org/10.1071/AJ21412
Published: 3 June 2022
Abstract
Poster G16
The NW–SE trending Otway Basin is a well-established hydrocarbon province with onshore and shallow-water offshore discoveries. However, the deep-water offshore is underexplored due to the sparsity of data in the past. New 2D seismic, gravity and magnetic data, acquired during the 2020 Otway Basin Seismic Program, were combined with legacy seismic data to improve the understanding of this part of the basin. The new data have been processed and integrated with existing open-file data to derive Moho and lithosphere–asthenosphere boundary surfaces. Additional wavelength filtering of the newly acquired magnetic and gravity data, using constraints from seismic data, provides valuable information on the geometry and the spatial extent of igneous rocks in the deep-water basin. While extrusive igneous rocks and related intrusive rocks in the Otway Basin can be inferred from seismic reflection data, the new magnetic and gravity data provide additional constraints that help to map their distribution across the basin.
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Keywords: deep-water, gravity, high-pass filter, hydrocarbon prospectivity, igneous rocks, magnetic modelling, magnetics, Otway Basin, tilt angle, wells.
Yvette Poudjom Djomani is a Geophysicist with over 25 years of experience. She joined the Mineral System Branch of Geoscience Australia in 2016 working on magnetic, radiometric and gravity survey data quality control and assurance. Since July 2021, she has been working in the Offshore Energy System Branch on potential field data processing and enhancement, and integration with seismic data to help map the distribution of igneous rocks in the offshore Otway Basin. Yvette completed a Bachelor Degree in Science at the University of Yaoundé (Cameroon), a PhD in Geophysics at the University of Paris XI (France) and an MBA from the Australian Institute of Business (Adelaide). She has worked in academia, industry sector and government agencies. Yvette is the current Treasurer of the Federal Executive of the Australian Society of Exploration Geophysicists (ASEG). She is also the Chair of the Gender Equity Network at Geoscience Australia. |
