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Insights into the Tectonic Evolution and Prospectivity of Madagascar Offshore BasinsNormal access

Authors: R. Dirkx, F. Winter, S. Musa, R. Cooke, B. Sayers, J. Halliday and E. Tibocha
Event name: 78th EAGE Conference and Exhibition 2016
Session: Sedimentology and Structural Regional Geology
Publication date: 31 May 2016
DOI: 10.3997/2214-4609.201601425
Organisations: EAGE
Language: English
Info: Extended abstract, PDF ( 7.24Mb )
Price: € 20

TGS has completed a geophysical and geological study of the hydrocarbon prospectivity of the entire western offshore margin of Madagascar from the Cap St. Marie Basin in the south to the Ambilobe Basin in the north. An extensive dataset, comprising new and reprocessed vintage seismic data, has provided an opportunity to make observations on the different structural styles across a frontier margin and identified potential new plays. Seismic interpretation demonstrates that the Davie Fracture Zone along the Morondava Basin has experienced major inversion of Mesozoic sediments around the Turonian, as a result of the separation of India and Madagascar. New seismic data in the Majunga and Ambilobe basins reveals exciting exploration targets. For example, large fan complexes extend the lower slope potential of Majunga Basin, in addition to salt related anticlinal four-way dip closures and pinchouts. Seismic interpretation of the Ambilobe Basin, has been integrated with gravity and thermal modelling, and supports the presence of rifted Karoo and Jurassic sediments within tilted fault blocks. Thus providing potential source and trap geometries in an unexplored basin.

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