Perth Basin Walyering Conventional Gas Field

120 square kilometres* *Area to be excised from a larger exploration licence, just focussed on the Walyering Gas Field.

The Walyering Gas Field was discovered in 1971 and a small compartment briefly put on production, producing about 0.25 Bcf gas. It is still crossed by the Parmelia gas trunk line that has available capacity. The field is located in a large, faulted anticline on the west side of the Dandaragan Trough which hosts the source kitchens for most of the gas discovered in the Basin.

A thick interbedded fluvio-deltaic sandstone reservoir system is present with top and lateral seals mostly provided by intra-formational shales and siltstones.

The target reservoirs are relatively deep, between 3,000m and 4,000m but when drilled correctly have been shown to have good natural flow potential. The Upper Cattamarra Coal Measures sand reservoir in Walyering-1 flowed naturally to surface at up to 13.5 MMcfd.

The reservoirs and trapping mechanism are very similar to that in the producing Gingin – Red Gully gas fields on geological trend some 80 km to the south.