Discovered in 1995 by Mobil, the Ascalon gas accumulation is located mostly within exploration permit WA-407-P and extends into the adjacent WA-420-P.
The gas is contained in a faulted horst structure within marine sandstones of Late Permian age. Mapping of the modern 3D seismic database, which we shot over the feature, together with 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 known gas defined from logs in the Ascalon-1A well.
Modern petrophysics indicates a 146m gross gas column within the Cape Hay Formation at the Ascalon-1A well location, which is moderately down dip off the crest of the structure.
Ascalon is located in proximity to a number of gas discoveries, some of which may be commercialised in coming years, including the Petrel and Tern discoveries. The potential for development of nearby gas discoveries may provide opportunities for Ascalon to be developed to tie-back to other developments. The field is also located in close proximity to the Bayu-Undan pipeline to Darwin as well as the Icythys pipeline to the Inpex LNG facility under development in Darwin, thus offering other potential opportunities.