Authors / CoAuthors
Petkovic, P. | Hashimoto, T.
Abstract
The term 'modelling while interpreting' refers to the use of 3D models during the interpretation of reflection seismic data in order to inform that process. Rather than using 3D models at a final stage of the project just to display results, new software tools are emerging to enable development of 3D models in parallel with the seismic interpretation work. These tools provide additional means to help interpreters make informed decisions such as where to pick basement and to check the 3D integrity of their geological models. Applications of this new workflow are illustrated through a recently completed petroleum prospectivity assessment of the Capel and Faust frontier deep-water basins located 800 km to the east of Brisbane. Geoscience Australia acquired 2D geophysical data across these basins in 2007 and subsequently mapped the complex distribution of sub-basins by integrating 2D time-domain seismic interpretation with 3D gravity modelling. Forward and inverse 3D gravity models were used to inform the seismic interpretation and test the seismic basement pick. The identification of basement was problematic due to a lack of wells and the likelihood that acoustic basement represented older sedimentary material intruded by igneous rocks. Sonobuoy refraction data were modelled to achieve conversion of travel times to depth and estimate densities. Modelling gravity while interpreting reflection seismic data improved confidence in the mapping of the extent and thickness of sediments in these basins, and has potential to be used more widely in mapping projects to reduce exploration risk.
Product Type
nonGeographicDataset
eCat Id
72614
Contact for the resource
Custodian
Point of contact
Cnr Jerrabomberra Ave and Hindmarsh Dr GPO Box 378
Canberra
ACT
2601
Australia
Keywords
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- External PublicationAbstract
- ( Theme )
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- gravity
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- model
- ( Theme )
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- sedimentary basins
- ( Theme )
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- seismic reflection
- ( Theme )
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- seismic refraction
- Australian and New Zealand Standard Research Classification (ANZSRC)
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- Earth Sciences
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- Published_Internal
Publication Date
2012-01-01T00:00:00
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geoscientificInformation
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[-29.5, -25.5, 159.5, 163.5]
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