Related by context. Frequent words. (Click for all words.) 67 Gran Tierra 66 Canacol 62 Gran Tierra Energy 62 Pacific Rubiales Energy 61 BPZ Energy 60 Petrolifera 60 BPZ 60 Geologix 59 Questerre 59 Stratic 59 CanArgo 58 GeoResources Inc. 58 Royale Energy 58 Crimson Exploration 57 Private Placement Financing 57 farmout 56 Harvest Natural Resources 56 Brazauro 56 Pacific Rubiales 56 VG Gold 56 Solitaire Minerals Corp. 56 PanOcean 56 AuEx 56 ValGold 56 Petrominerales 56 Medoro 55 Llanos Basin 55 Mooncor 55 Evolving Gold 55 Duran Ventures 55 Gryphon Gold 55 Legacy Reserves 55 Richmont Mines 55 Merrex 55 Parallel Petroleum 55 TAG Oil 55 Canarc 55 Vangold 55 Optionor 55 Culane 54 WesternZagros 54 Silvermex 54 Brigham Exploration 54 Approach Resources 54 operatorship 54 Teck Cominco Limited 54 TXCO 54 Ivanhoe Energy 54 B2Gold 54 Gastar 54 Petroflow 54 Petrodelta 54 Transeuro 54 EnerJex 53 Twin Butte 53 Majescor 53 ProspEx 53 Xtierra 53 Comaplex 53 Bois d' Arc 53 Ecopetrol 53 Dejour 53 PetroQuest 53 Soltoro 53 Pan Orient 53 AuEx Ventures Inc. 53 overriding royalty interest 53 Hyperdynamics 53 Concho Resources Inc. 53 Comstock Resources 53 BacTech 52 Petro Andina 52 Bankers Petroleum 52 GMXR 52 Vior 52 JOGMEC 52 Avion Gold 52 Gastem 52 Pelangio 52 Lexam 52 Enterra Energy 52 Ecopetrol SA 52 Magellan Petroleum 52 Whiting Petroleum Corporation 51 Petaquilla 51 Strateco 51 Highpine 51 Tournigan 51 Newfield Exploration Company 51 Atna 51 Afri Can 51 Oilsands Quest 51 First Tranche 51 McMoRan 51 Production Sharing Contract 51 Marifil 50 Shoreham Resources 50 Cequence 50 Lundin Petroleum 50 Newfield Exploration 50 Quifa