Related by context. Frequent words. (Click for all words.) 84 hydrocarbon 65 Hydrocarbons 63 oil 61 hydrocarbon reserves 60 petroleum 60 natural gas 58 Hydrocarbon 58 gas condensate 58 condensate 57 gas 57 gas hydrates 56 carbonates 55 condensates 55 minerals 55 shale 55 shale gas 55 methane 55 liquid hydrocarbons 54 shale deposits 54 deepwater 53 shales 53 wellbore 52 hydrocarbon bearing 52 sulfur 52 oilfields 52 bitumen 51 subsurface 51 EOR 51 geological formations 50 carbonate 49 hydrogen sulphide 49 crude oil 49 oil sands 49 mineral 49 tcf 49 coalbed methane 49 oilfield 49 Santos Basin 49 mineral deposits 49 wells 49 deepwater Gulf 48 ethane 48 coal seams 48 mineral extraction 48 petrochemicals 48 gases 48 recoverable reserves 48 mineral resources 48 CO2 48 carbon dioxide CO2 47 gas liquids 47 organic compounds 47 shale formations 47 Sonatrach 47 wells drilled 47 deepwater exploration 47 trillion cubic feet 47 sediments 47 uranium 46 Tcf 46 sulfide 46 Haynesville Shale 46 drilling 46 sulfides 46 carbon dioxide 46 Repsol 46 subsoil 46 sulphide 46 Bitumen 46 Petroleum 46 wellhead 46 ores 46 sands 46 barite 46 Bakken formation 45 Repsol YPF 45 porosity 45 H2S 45 Ecopetrol 45 hydrates 45 exploration 45 seabed 45 drilling fluids 45 basins 45 sandstones 45 Haynesville shale 45 Maersk Oil 45 IOCs 45 exploratory drilling 45 gaseous 44 downhole 44 sulphides 44 fossil fuels 44 Caspian Sea 44 horizontal drilling 44 prospectivity 44 hydrogen 44 ultra deepwater 44 Statoil 44 wellheads 44 Campos Basin