There is no "asset value" because Empire has virtually NO ASSETS. All they have is a license to drill two wells and unless they find oil in economically producible amounts (which is by Empires own admission very unlikely) they do not have an "asset".
To talk of a $25 share price is also IMO very unrealistic when you look at the share price of other companies who have recently found oil (E.g. Stuart Petroleum, Vic Pet, Central Petroleum etc).