NDLI: Deepwater Taranaki, New Zealand: structural development and petroleum potential

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Deepwater Taranaki, New Zealand: structural development and petroleum potential

Content Provider	Scilit
Author	Uruski, Christopher Lan
Copyright Year	2008
Description	Journal: Exploration Geophysics Deepwater Taranaki is investigated for its petroleum potential, using all available seismic data tied to shallow-water wells. It contains up to 10 km of sediment. An early rift sequence is overlain by a large Late Cretaceous delta, which culminates with the mid-Campanian Rakopi Formation coal measures. This sequence marks the break-up unconformity following the start of Tasman Sea spreading. A passive margin succession follows as the New Zealand mini-continent gradually subsided, with sediments becoming gradually finer grained until carbonates dominate during the Oligocene. Initiation of the present plate boundary around the start of the Miocene, 25 million years ago, caused uplift and renewed clastic deposition in the form of spectacular channel and turbidite complexes. The present reconnaissance seismic grid indicates at least six subtle structures that are each large enough to contain a billion barrels of oil or several trillion cubic feet of gas, suggesting that the first drilling targets may be Late Cretaceous fluvial and marine sands draped across gentle basement structures. Cretaceous structures are commonly overlain by Miocene channel and turbidite sands that are also draped across underlying highs. The similar, but much smaller structures of Tui, Amokura, and Pateke, on the Taranaki shelf, are currently being produced by AWE. Future discoveries are likely closer to the shelf edge and ultimately the larger prizes will be sought in deeper water.
Related Links	http://www.publish.csiro.au/eg/pdf/EG08013
ISSN	08123985
e-ISSN	18347533
DOI	10.1071/eg08013
Journal	Exploration Geophysics
Issue Number	2
Volume Number	39
Language	English
Publisher	Informa UK Limited
Publisher Date	2008-06-01
Access Restriction	Open
Subject Keyword	Journal: Exploration Geophysics Deepwater Taranaki Petroleum Potential Cretaceous Delta Miocene Turbidites Large Traps.
Content Type	Text
Subject	Geology Geophysics

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