Related by context. Frequent words. (Click for all words.) 56 Ecopetrol 55 Pacific Rubiales 54 Galoc 49 BPZ 49 Corvina 48 Campos Basin 48 Ivanhoe Energy 47 Cerro Negro 47 Petroceltic 47 PEMEX 47 Repsol YPF 46 Santos Basin 46 Tupi field 46 Petrolifera 45 Chinguetti 45 Stratic 45 Repsol 44 TXCO 44 Karachaganak 44 Petrominerales 43 subsalt 43 Tupi 43 PDVSA 43 Penoles 43 Repsol YPF SA 42 Petrobank 42 Sonangol 42 Cepsa 42 Perenco 42 Petrohawk 42 Oriente 42 Galp 42 Spain Repsol YPF 41 Cantarell 41 Kashagan 41 operatorship 41 Petrobras 41 Alaska Prudhoe Bay 41 Harvest Natural Resources 41 PTTEP 41 PdVSA 41 deepwater exploration 41 MarkWest 40 Minefinders 40 Lundin Petroleum 40 Gran Tierra Energy 40 Duvernay 40 Carabobo 40 South Pars 40 Venoco 39 Gulfsands 39 Pengrowth 39 Wintershall 39 Keyera 39 Petaquilla 39 Maurel & 39 Junin 39 Dorado 39 TGP 38 DNO 38 Petroecuador 38 oilfields 38 Santos 38 Pemex 38 Orinoco 38 Afren 38 Connacher 38 Royale Energy 38 XTO 38 Spain Repsol 38 Pdvsa 38 refining 38 Tullow 37 Cenovus 37 Gasco 37 Petrocaribe 37 YPF 37 PXP 37 Statoil 37 Tesoro 37 Oilexco 37 Cosan 37 StatoilHydro 36 Anadarko 36 Oxy 36 Vaquero 36 Maersk Oil 36 Eni 36 Cerro Colorado 36 IOCs 36 Carrizo 36 Talisman 36 hydrocarbon reserves 36 Amerada Hess 36 Las Cristinas 35 Hydrocarbons 35 Gas Natural 35 Entrada 35 NuStar 35 KazMunaiGas 35 Occidental Petroleum Corporation