Related by context. Frequent words. (Click for all words.) 64 Newfield Exploration 62 VAALCO 61 TXCO 60 Hercules Offshore 60 BPZ 59 Brigham Exploration 59 Harvest Natural Resources 59 BPZ Energy 57 Vanguard Natural Resources 57 NYSE TOT 57 ERHC 57 PetroQuest 56 Ultra Petroleum 56 Petro Andina 56 Pacific Rubiales 56 Crosstex Energy 56 McMoRan 56 Approach Resources 55 Allis Chalmers Energy 55 Hyperdynamics 55 Bronco Drilling 55 Gastar 55 Rosetta Resources 55 Anadarko Petroleum 55 Comstock Resources 55 ENSCO International 55 Cal Dive 54 Ensco International 54 Royale Energy 54 Petrohawk 54 EXCO Resources Inc. 54 GMXR 54 Helix Energy 53 Gran Tierra Energy 53 Gulfsands 53 NYSE APC 53 Energy XXI 53 Anadarko 53 Lundin Petroleum 53 Legacy Reserves 53 Petrolifera 53 Kosmos Energy 52 CNOOC Ltd 52 MarkWest Energy Partners 52 CNX Gas 52 StatoilHydro 52 Occidental Petroleum Corporation 52 Magnum Hunter 52 Oilex 52 Enerplus Resources Fund 52 Sibir Energy 52 SandRidge 52 Whiting Petroleum Corporation 52 Statoil 52 Cal Dive International 52 Synenco 52 Petroceltic 51 PetroSun 51 Canacol 51 XTO 51 MarkWest 51 PXP 51 Contango 51 National Oilwell 51 RigNet 51 Quicksilver Resources 51 Anadarko Petroleum Corp. 51 Petrobank 51 CNOOC 51 McMoRan Exploration Co. 51 Ivanhoe Energy 51 EOG 51 Talisman Energy 51 EVEP 51 Ecopetrol 51 Nexen 51 CNOOC Limited 50 Repsol 50 Cimarex 50 Afren 50 Roc Oil 50 EnQuest 50 MegaWest 50 Ensco 50 Transfer Equity 50 BreitBurn 50 Talisman Energy Inc. 50 InterOil 50 farmout 50 Talisman 50 LUKOIL 50 Perenco 50 Petro Vista 50 Cimarex Energy Co. 50 Bankers Petroleum 50 DryShips 50 Regal Petroleum 50 VHGI 50 Chevron Corp CVX.N 49 Repsol YPF SA 49 Repsol YPF