A REGIONAL ASSESSMENT OF THE CO2 STORAGE POTENTIAL OF THE SOUTHERN BONAPARTE BASIN, OFFSHORE NORTHERN TERRITORY  

Authors / CoAuthors

Consoli, C. | Higgins, K. | Lescinsky, D.T. | Nguyen, D. | Khider, K.

Abstract

Geoscience Australia has completed a regional study of the greenhouse gas storage prospectivity for the Petrel Sub-basin (Bonaparte Basin), offshore Northern Territory. The Bonaparte Basin is a mature petroleum exploration province and well placed for possible CO2 storage. Former greenhouse gas acreage release areas, as well as the recommendation of the Carbon Storage Taskforce provided the impetus for the collection of pre-competitive data and a regional geological study. In 2009, the Taskforce had identified large, low risk storage capacity within the Mesozoic formations of the Petrel Sub-basin. Data acquisition was designed to cover an area of low seismic coverage and to better define potential traps and seal integrity. A total of 4091 km of high resolution, 2D seismic data was acquired in early 2012 and is currently available through pre-competitive data through Geoscience Australia. Also, a marine environment survey, which comprised collection of biophysical data, as well as seabed and shallow surface geophysical data, was completed. These data sets provide a baseline for future monitoring, as well as assistance in understanding uncertainty in leakage pathways. These datasets have been integrated and interpreted in a 3D visualisation and modelling environment where different geological scenarios could be tested. A basic geological model encompassing stratigraphic horizons and structure was constructed and then populated using well data as well as extrapolation methods such as facies modelling. This geological and reservoir engineering project has assessed prospective plays for CO2 injectivity and migration using the predicted CO2 sources available in the region. The findings of this study adds to the knowledge of Australia's offshore basins and supports both government and industry for future CO2 storage exploration in the Bonaparte Basin, as well as the carbon capture and storage industry in general. WABS

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nonGeographicDataset

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75407

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• External Publication

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• marine

Australian and New Zealand Standard Research Classification (ANZSRC)

• Earth Sciences

• Published_Internal

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2013-02-27T00:00:00

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