Restricted on advice from A. Barrett

A seismic aluvey was made between St George and the Queensland/South Australia border in the latter half of 1962. The results of the part of the survey over the Surat Basin, the Nebina Ridge, and the Eulo Shelf are presented in this Record. The survey aimed at providing information on the nature and structure,of the rocks underlying the Mesozoic sediments of the Great Artesian Basin, in particular across the Nebine Ridge and Eulo Shelf. The results of the survey between St George and Bollon indicated a sedimentary section of the order of 5000 ft overlying a basement rock of either metamorphic or igneous origin. The-deepest section recorded was of about 5700 ft, about 12 miles west of St George and probably corresponds to the Boolba Trough suggested by Jenkins (1958). The sedimentary section becomes gradually thinner westward as the Nebine Ridge is approached and about 3000 ft of sediments were recorded about ten miles west of Bollon. A reflection traverse northwards along the axis of the Boolba Trough indicated a thinning of sedimentary section of about 40 ft per mile. No structural explanation for a magnetic lineament interpreted from aeromagnetic work was found. Velocities of over 19,000 ft/s were recorded from granitic rocks at shallow depths over the Nebine Ridge. A velocity of 19,500 ft's was measured close to a granite outcrop at Eulo. A thickening of the sedimentary section between the Eulo Shelf and Nebine Ridge was confirmed by refraction shooting and depths indicated that the total section (3300 ft) was not significantly greater than the depth of the water bores. No apparent development of the trough to the north or west was indicated.

Oil and Gas pipeline infrastructure and resources fields.

This record comprises largely 160 spreadsheets containing quantitative organic geochemical and permeability/porosity data from 111 petroleum exploration wells located throughout the Canning Basin (Fig 1). About half of the geochemical data is from AGSO's Orgchem database (as at 5.5.94); and it was largely this information that was used to undertake the petroleum systems analysis described in Kennard et al., (1994). That review, and this database, have been augmented substantially by geochemical information from well completion reports and other unpublished company reports that were examined during the compilation of information in Stage II of the Project, between 1992-4. This information has not been incorporated into Orgchem. The permeability and porosity data are from individual well completion reports and other unpublished company reports.

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Now is a pivotal time for petroleum exploration in Australia as we endeavour to meet our twin imperatives of finding more oil and using gas. More oil is being found as emphatically demonstrated by the recent oil discoveries in the Perth (Cliff Head, Hovea) and Carnarvon (Exeter) basins. The Cliff Head accumulation may prove to be the largest oil field yet found in the Perth Basin, nearly forty years after the first onshore discovery. In addition to these successes in established basins, deep water wells are being drilled that have the potential to unlock whole new petroleum provinces and usher in another phase of major oil discovery akin to the bonanza of the 1960s, when the first steps into the offshore resulted in billion barrel discoveries in Bass Strait. By the close of the first successful cycle of exploration in Australia (1960 to 1972) all currently producing basins were identified as petroliferous, the major play types had been established and over 60% of Australia?s current oil reserves found. The key drivers were the access to new basins opened up by the move to offshore exploration and the stimulus to further exploration provided by discovery success. The same drivers are now apparent. The current deep water drilling campaign is stepping out beyond former geographic limits to test major Mesozoic depocentres on the outer margin of the North West Shelf and in the Great Australian Bight. And key discoveries are being made in many basins, including giant gas fields in the Browse and Carnarvon basins that can underpin Australia?s expanding LNG exports and may provide additional liquids supply from associated condensate.

Restricted on advice from A. Barrett

Restricted on advice from A. Barrett

Most of Australia's continental margin has not been thoroughly explored for petroleum, and can be regarded as 'frontier'. In order to understand the petroleum and other resource potential of Australia's frontier basins, it is necessary to know the location and physical and geological attributes of those basins. Whilst data on particularly larger basins has been collated locally, no comprehensive inventory of Australia's basins has existed at national scale. In addition, recent work associated with the Law of the Sea has seen knowledge of offshore basins in frontier areas expand considerably. AGSO's Basin Evaluation Project has addressed these shortcomings by compiling an inventory of all known sedimentary basins in Australia and its ocean territories, to be made available on CD and via the Internet, as part of the national geoscience database. The detail available on each basin varies with both its relative resource importance and our current level of knowledge. The inventory also cites key references and further sources of information and includes hot-links. It is in part designed to give an overview of Australian basins to those in in the international petroleum industry not familiar with details of Australian geology and petroleum potential.

Restricted on advice from A. Barrett