Under accounting rules, cost is what is recorded in the books (except for a BDC) whwreby unrealized market value increases are shown at market. Oil in tanks is cost also. the market value is when you have a cistomer and it turns into revenue and the cost is the cost of goods sold.
You can value company and that will be in the 10-K at end of year (or really March 2008). In that filing, the Company will (required) disclose oil and gas reserves, pv of cash flows of all wells and leases in acordance with FAS 69 - this will be a supplemental footnote in the financial statements.
Market Data 
Markets 
AI
