Quick & dirty comparison of OAS vs HES: [pre] OAS HES Enterprise value* ($ Bln) 3.1 24.5 3Q11 production (Kboe/d) 12 344 Enterprise value per unit of production ($/boe/d) 258K 71K[/pre] Thus, by this simpleminded analysis, OAS is about four times as expensive as HES. *According to Yahoo Finance.