Related by context. Frequent words. (Click for all words.) 48 Petrolifera 44 Vangold 42 Lundin Petroleum 42 VAALCO 41 ERHC 40 PrimeWest 40 Pengrowth 40 EXCO 40 Gastar 39 Tullow 39 Highpine 38 TXCO 38 McMoRan 37 Cimarex 37 Talisman 37 EOG 37 Magnum Hunter 37 RSF 37 Statoil 36 TAG Oil 36 Hyperdynamics 36 Keyera 36 StatoilHydro 36 IFEX 36 Gran Tierra Energy 35 PXP 35 Energy XXI 35 operatorship 35 EXCO Resources Inc. 34 Denbury 34 Oilsands Quest 34 Enerplus 34 GMXR 34 Oilexco 34 TAQA 34 Wintershall 34 Addax Petroleum 34 Kosmos Energy 33 Flotek 33 Maersk Oil 33 Encana 33 Petrohawk 33 Harvest Natural Resources 33 Anadarko 33 PetroBakken 33 Duvernay 33 Canetic 32 McMoRan Exploration Co. 32 GreenHunter Energy 32 NUJP 32 CNOOC Limited 32 Petrominerales 32 XTO 32 Hercules Offshore 32 InterOil 31 Rosetta Resources 31 Ultra Petroleum 31 Sanef 31 Baytex 31 GLJ 31 Contango 31 Cal Dive 31 Atlas Pipeline 31 Bois d' Arc 31 GNPC 31 Journalists IFJ 30 SandRidge 30 EOG Resources Inc. 30 RWB 30 Copano 30 Oando 30 Seadrill 30 Statoil ASA 30 Genoil 30 Denbury Resources Inc. 29 Serica 29 IAPA 29 Venoco 29 Sahrawi 29 GlobalSantaFe 29 CPJ 29 Quicksilver Resources 29 UNOCI 29 Grey Wolf 29 Willbros 29 SandRidge Energy Inc. 29 Allis Chalmers Energy 29 Comstock Resources 29 OHCHR 28 Bakken Shale 28 Ivanhoe Energy 28 MISA 28 XTO Energy Inc. 28 Grant Prideco 28 MSF 28 Mbarushimana 28 leasehold 28 Ensco 28 Novatek 28 Quest Resource 28 MarkWest