Australia: Shell Completes Acquisition of Tortilla 2D Seismic Survey

Octanex N.L. has been advised by Shell Development (Australia) Pty Ltd (Shell) that it has completed acquisition of the new Tortilla 2D seismic survey in the WA-385-P permit.

The Tortilla survey is a relatively small 783 km 2D marine seismic survey that fulfils the final work commitment for the WA-385-P permit in the current term. It was acquired off the North West Cape of Western Australia, largely within the area of the WA-385-P permit.

The survey also acquired ‘tie lines’ between the planned location for the Palta-1 well (to be drilled in the WA-384-P permit to the north) and previously drilled wells Herdsman-1 and Pendock-1A to the south and Falcone-1A to the north-east.

The acquisition of the Tortilla 2D survey was timed to avoid the humpback whale migration and took place over the last 10 days of March. As part of a range of management measures, Shell elected that the seismic survey would not come within a 10 km buffer zone to the outer boundary of the Ningaloo World Heritage Area.

Shell has committed to drill the Palta-1 exploration well in the WA-384-P permit and has received environmental approval for the drilling operations. The WA-384-P permit is adjacent to WA-385-P where the Tortilla 2D seismic survey was acquired.

Shell has advised that drilling operations on Palta-1 are being planned for Q3 2012, subject to their receiving all required regulatory approvals. The well is to be drilled in water depths of approximately 1350m and to a total depth of 5325m – 5675m.

The Octanex Group originally held 100% of the WA-384-P, WA-385-P and WA-394-P permits that are located in the southern Exmouth Sub-basin (as shown in Figure 2). In 2008, Octanex concluded an agreement with Shell for the disposition of a 100% working interest in each of the three permits. Octanex holds residual rights in each of the permits in the form of discovery payments and a 1% royalty over any production from the permits, as well as rights of re-conveyance.

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Subsea World News Staff , April 04, 2012;  Image: Octanex