Authors / CoAuthors
Borissova, I. | Nicholson, C.J. | Krassay, A.A. | Newmann, V. | Di Primio, R.
Abstract
The southwest Australian margin comprises the NW-SE trending Perth Basin and the deep-water Mentelle Basin. The complex architecture of this margin is a result of NE-SW extension in the Permian followed by predominantly NW-SE extension in the Middle Jurassic to Early Cretaceous. The Vlaming Sub-basin is a major Jurassic-Early Cretaceous depocentre in the southern part of the Perth Basin containing more than 12 km of basin fill. Exploration activity in the Vlaming Sub-basin to date has identified an active petroleum system represented by oil and gas shows and a small non-commercial oil discovery in the central part of the sub-basin. The Mentelle Basin consists of two large unexplored depocentres lying to the west of the Vlaming Sub-basin and containing up to 9 km of sediments. Despite the close proximity of the two basins, direct sequence correlation is not possible as they are separated by a prominent basement high. A tectonostratigraphic framework for the Mentelle Basin has been developed using Vlaming Sub-basin as a proxy. Seismic facies analysis was then applied to interpret potential petroleum systems elements. Based on this interpretation 2D petroleum systems modelling has been carried out for three regional seismic lines. Modelling results indicate that the postulated source rocks entered the oil window in the Late Jurassic and generated most oil in the Early Cretaceous, however some source rocks continued generating small amounts of oil throughout the Tertiary up to the present. Potential plays in the Mentelle Basin include anticline, fault block and sub-unconformity types. Several hydrocarbon accumulations have been modelled across the Mentelle Basin suggesting potential prospectivity in this untested frontier basin.
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nonGeographicDataset
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67254
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- External PublicationArticle
- ( Theme )
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- petroleum geology
- ( Theme )
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- petroleum exploration
- Australian and New Zealand Standard Research Classification (ANZSRC)
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- Earth Sciences
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- Published_Internal
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2008-07-29T00:00:00
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