Ascalon Gas – appraisal
Discovered in 1995 by Mobil, the Ascalon gas discovery is an appraisal and development opportunity currently located within exploration permit WA-407-P. Octanex has been granted a Location over the Ascalon gas accumulation, a first step in preparation for application for a Retention Lease over the accumulation.
The gas is contained in a faulted horst structure within shallow marine sandstones of the Late Permian, Cape Hay Formation of the Hyland Bay Subgroup. Mapping on modern 3D and newly reprocessed 2D seismic indicates a closure over an area of 260km2 with a maximum closure height of 380m. The lowest closing contour appears coincident with lowest know gas defined from logs in the Ascalon-1A well. Modern petrophysics indicates a 146m gross gas column within the Cape Hay Formation in the Ascalon-1A well, which is located off the crest of the structure. The reservoir sandstones within the Cape Hay Formation are tight, not unlike those in the nearby Petrel and Tern gas discoveries.