Also well worth a read of todays Santos presentation re unconventional and gas in the Cooper including this from Page 17 "vertical shale wells are economical at $6GJ based on Moomba 191 characteristics. Horizonatal wells provide opportunity for significant additional value enhancement."
Here is the read:
http://hotcopper.com.au/announcementFiles/2012/STO/b803f8cf-a928-4f0d-b0dd-78f79c5b3c5c-STO705855.pdf