Exploring the Relationship between Global Eustatic Change and Simultaneous Regional Tectonic Events in Southeast Asia - Implications for Petroleum Systems
Higton, Jamie; Collins, Edward; Lavender, Andrew M.
Neftex Petroleum Consultants Ltd, Abingdon, United Kingdom.
The vast majority of hydrocarbon reserves and much of the remaining potential in the Southeast Asia resides in the Cenozoic stratigraphy. This era also records major palaeogeographical change through numerous local and regional tectonic events that have shaped the region. The global eustatic signal will be enhanced or dampened locally by the presence of tectonically controlled uplift or subsidence, and thus affect source rock and reservoir deposition in prospective basins.
An in-depth study of much of the published geological data for the Southeast Asia region has been carried out by Neftex over the past five years. This has involved the calibration of the regional stratigraphy to a proprietary global sequence stratigraphic model by using the available biostratigraphic data. Mega-regional stratigraphic correlations from basin to basin make it possible to evaluate petroleum systems elements both in terms of their relationship to global sequence systems tracts, as well as their relevance to regional or local tectonic events.
Petroleum systems in northwest Borneo, southwest Vietnam and the Makassar Straits are highlighted as examples where the interplay between tectonics and eustacy is linked to the enhancement of source rock facies distribution and deepwater turbidite reservoir potential. The importance of predicting such relationships is high given that much of the current Southeast Asia exploration focus is in these areas.
AAPG Search and Discovery Article #90155©2012 AAPG International Conference & Exhibition, Singapore, 16-19 September 2012