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TORQUAY SUB-BASIN, OTWAY BASIN, VICTORIA

The Torquay Sub-basin is a Mesozoic to Cenozoic depocentre that forms part of the eastern Otway Basin. Water depths are shallow, with a maximum depth of approximately 90 m. Three exploration wells exist in the offshore part of the sub-basin and seismic coverage is moderate. Potential for greenhouse gas storage is within long distance migration dissolution/residual trapping, inversion anticlines and hanging wall traps.

Reservoir:   Eastern View Group and the overlying Boonah Formation.
Seal:            Anglesea Siltstone within the Demons Bluff Group regional seal and intra-formational seals within the Eastern View Group.
Trap:             Multiple structural and sedimentary traps and migration dissolution/residual trapping.

Refer to Gibson-Poole et al., 2008 for stratigraphic information.

TORQ-01 AND TORQ-02, Torquay Sub-basin, Otway Basin

TORQ-01 and TORQ-02 are located approximately 100 km southwest of Melbourne (Figure 1). The release areas are bounded by the coastal waters limit to the north, and extend close to the Victoria/Tasmania border in the south. 

Release area TORQ-01 covers an area of approximately 3305 square kilometres and 53 graticular blocks, or parts thereof (Figure 2). The release area TORQ-02  covers an area of approximately 3740 square kilometres and 63 graticular blocks or parts thereof (Figure 2).

Overlapping Petroleum Exploration Titles

Figure 1. Location map of offshore Greenhouse Gas Storage release areas for Assessment TORQ-01 and TORQ-02, Torquay Sub-basin, Otway Basin.