The Onshore Energy Security Program (OESP) will deliver reliable, precompetitive geoscience data and scientifically based assessments of the potential for onshore energy resources, including oil, gas, hot rocks (geothermal energy), uranium and thorium. The program is scheduled to finish in mid 2011 and is designed to significantly boost investment in exploration for onshore energy resources, particularly oil, gas and hot rocks to assist in securing a sustainable domestic energy supply and underpin Australia’s energy exports. It complements Geoscience Australia's offshore exploration for hydrocarbons in frontier regions.
The Onshore Energy and Minerals Division is implementing the OESP in consultation with the State and Northern Territory Geological Surveys and peak minerals and petroleum industry bodies, including the Australian Petroleum Production and Exploration Association (APPEA) and the Association of Mining and Exploration Companies (AMEC).
Under the Airborne Electromagnetics (AEM) Project, AEM data is being acquired in areas considered to have potential for uranium and thorium mineralisation. The focus of acquisition is directed at geologic architecture indicative of unconformity-related and Palaeochannel-hosted uranium potential. Two regional-scale projects have been completed - Paterson Province in Western Australia (WA) and Pine Creek in the Northern Territory (NT). A third project may be undertaken in the Frome Embayment northwest Murray Basin region in South Australia (SA).
A major output of the OESP, the Radiometric Map of Australia was released in February 2009. The processed radiometric data from the Australian Wide Airborne Geophysical Survey (AWAGS) define the Australian Radioelement Datum and are used to adjust existing Commonwealth, State and Territory public domain data in the National Radiometric Database. The survey also serves as the base for radiometric data acquired in future decades. The processed magnetic data will be used to improve the frequency content of the Australian Magnetic Anomaly Map and will be incorporated into continental-scale data sets. The data fill the gap between wavelengths of about 100 kilometres from airborne surveys and wavelengths greater than 400 kilometres from satellites. The data will assist with the assessment of uranium and thorium potential across the continent and with regional heat flow studies aimed at identifying geothermal energy resources.
The Geothermal Energy Project aims to increase understanding of the type and location of geothermal energy resources on a national scale and to encourage exploration for, and investment in, this type of renewable energy. The project's multi-faceted work program is broadly aimed at compiling a single dataset using existing data to identify high heat producing granites and acquire new data to better understand the distribution of temperature in the continent's upper crust. Results from the project are being progressively released.
Gravity data acquired over parts of the Cooper Basin in southwest Queensland, and delivered through the Australian National Gravity Database, are an important product from the OESP. The data are assisting with the assessment of hydrocarbon potential in the region as well as with the identification of granites beneath the basin which have the potential for geothermal energy.
The National Geochemical Survey of Australia Project aims to provide a nation-wide, internally consistent and state-of-the-art dataset on the geochemical composition of surface and near-surface materials in Australia. The data are expected to contribute precompetitive knowledge to help toward more effective exploration for energy and minerals resources.
The Onshore Energy Geodynamic Framework Project, in partnership with the State and Northern Territory Geological Surveys, acquires, processes and interprets precompetitive geoscience information under the OESP.
The Onshore Petroleum Project is a staged program of data acquisition under the OESP which involves the collection of airborne magnetics and radiometrics, magnetotellurics and, where appropriate, gravity, followed by high-quality deep seismic reflection data. The Project is focussing on selected areas in the Darling Basin in New South Wales (NSW), Arrowie and Officer Basins (SA), Georgina and Amadeus Basins (NT) and Kidson Sub-basin (Canning Basin, WA).
The Seismic Acquisition and Processing Project is managing seismic and magnetotelluric (MT) data acquisition and processing components of the OESP. Six deep crustal seismic surveys have been conducted since 2007 and the results are progressively being released. The areas include Isa-Georgetown-Charters Towers in Queensland (QLD), Rankins Springs (NSW), Gawler-Curnamona-Arrowie (SA), Gawler-Officer-Musgrave-Amadeus (SA/NT), Curnamona Gawler Link (SA) and Georgina-Arunta (NT).
A Thorium Project completed in 2008 established the extent of Australia's known thorium resources and described the geochemical environments in which thorium occurs in Australia. In view of ongoing interest from the government, energy and minerals industry and members of the public in thorium as a possible source of fuel for nuclear reactors, Geoscience Australia is maintaining a watching brief on overseas developments in thorium reactors.
The Uranium Systems Project under the OESP aims to map the distribution of known uranium enrichment and related rocks in Australia, develop a new understanding of the processes which control where and how uranium mineral systems develop and assess the potential for undiscovered uranium mineralisation at regional to national scales.