Related by context. Frequent words. (Click for all words.) 68 BPZ Energy 62 Gran Tierra 62 Canacol 61 GMXR 61 Newfield Exploration 61 Harvest Natural Resources 60 Brigham Exploration 60 Pacific Rubiales 60 Petro Vista 59 Pacific Rubiales Energy 58 Crimson Exploration 58 Cimarex Energy 58 Royale Energy 57 Petrolifera 57 Stratic 57 ENSCO International 57 Ivanhoe Energy 57 Approach Resources 57 Ecopetrol 57 Magnum Hunter 56 Petrominerales 56 PetroQuest 56 Petrohawk 56 Rosetta Resources 56 TXCO 56 Petroceltic 56 Whiting Petroleum 56 Hercules Offshore 56 Gran Tierra Energy 55 Comstock Resources 55 GeoResources Inc. 55 Petrobras 55 Bronco Drilling 54 Hyperdynamics 54 Cheniere Energy 54 NFX 54 Corvina 53 McMoRan 53 Cimarex 53 Oilex 53 Parallel Petroleum 53 EnerJex 53 Legacy Reserves 53 Questerre 53 Petrohawk Energy Corporation 53 Concho Resources Inc. 53 NYSE RRC 52 Allis Chalmers Energy 52 Zincore 52 Petro Andina 52 Ensco International 52 Copano Energy 52 Norsemont 52 EOG 52 Ultra Petroleum 51 Aminex 51 Galp 51 Llanos Basin 51 Anadarko 51 PXD 51 Cano Petroleum 51 Ecopetrol SA 51 PEMEX 51 Silvermex 51 Gastar 51 PXP 50 Goodrich Petroleum 50 VAALCO 50 Bankers Petroleum 50 Vangold 50 Rio Alto 50 Xtreme Coil 50 Callon Petroleum Company 50 McMoRan Exploration Co. 50 OGE Energy 50 Vanguard Natural Resources 50 NYSE APC 50 SandRidge Energy 50 Afren 50 AUY 50 Minefinders 50 Campos Basin 50 InterOil 50 Petroleo Brasileiro 50 Cimarex Energy Co. 49 Energy XXI 49 Rubiales 49 Gasco Energy 49 operatorship 49 Pioneer Natural Resources 49 Sterling Bancshares 49 ProspEx 49 EVEP 49 Petrodelta 49 NYSE TOT 49 CVX 49 CNOOC Limited 49 Oilsands Quest 49 Canarc 49 Galoc 49 Energen