CSIRO Publishing blank image blank image blank image blank imageBooksblank image blank image blank image blank imageJournalsblank image blank image blank image blank imageAbout Usblank image blank image blank image blank imageShopping Cartblank image blank image blank image You are here: Journals > Exploration Geophysics   
Exploration Geophysics
http://www.aseg.org.au
  The Journal of the Australian Society of Exploration Geophysicists
 
blank image Search
 
blank image blank image
blank image
 
  Advanced Search
   

Journal Home
About the Journal
Editorial Committee
Contacts
For Advertisers
Content
Online Early
Current Issue
Just Accepted
All Issues
Special Issues
Sample Issue
For Authors
General Information
Instructions to Authors
Submit Article
Open Access
For Referees
Referee Guidelines
Review an Article
Annual Referee Index
For Subscribers
Subscription Prices
Customer Service
Print Publication Dates

blue arrow e-Alerts
blank image
Subscribe to our Email Alert or RSS feeds for the latest journal papers.

red arrow Connect with CP
blank image
facebook twitter youtube

red arrow Submit Article
blank image
Use the online submission system to send us your paper.

red arrow Preview
blank image
Preview, the Magazine of the Australian Society of Exploration Geophysicists, is also available online.

red arrow ASEG Extended Abstracts
blank image
ASEG Extended Abstracts, drawn from the ASEG´s conferencces, is also available online.

 

Article << Previous     |     Next >>   Contents Vol 39(2)

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

Christopher lan Uruski

GNS Science, PO Box 30 369, Lower Hutt, New Zealand. Email: c.uruski@gns.cri.nz
 
PDF (3.4 MB) $25
 Export Citation
 Print
  


Abstract

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.

Keywords: Deepwater Taranaki, petroleum potential, Cretaceous delta, Miocene turbidites, large traps.



* *Presented at the 19th ASEG Geophysical Conference & Exhibition, November 2007.
   
Subscriber Login
Username:
Password:  

    
Legal & Privacy | Contact Us | Help

CSIRO

© CSIRO 1996-2015