Related by context. Frequent words. (Click for all words.) 79 shale 69 Marcellus shale 67 oil sands 67 coalbed methane 64 Marcellus Shale 64 natural gas 63 horizontal drilling 63 Haynesville Shale 62 Barnett Shale 60 coal seam gas 60 Shale 60 oilsands 59 hydrocarbon 58 Haynesville 57 fracking 57 tar sands 56 Marcellus 56 hydraulic fracturing 55 Williston Basin 55 hydrocarbons 54 deepwater 54 horizontal wells 53 bed methane 53 drilling 53 Encana 53 oil 52 oilfields 52 drillers 51 Bakken 51 coal 51 Oil Sands 51 gas 51 potash 51 carbon capture 50 CNOOC 50 exploratory drilling 50 CBM 49 coal gasification 49 exploration 49 onshore 49 oilfield 48 trillion cubic feet 48 wells drilled 47 XTO 47 Natural Gas 47 EnCana 46 Chesapeake Energy 46 liquefied natural gas 46 EOG 46 Cnooc 45 offshore drilling 45 Cairn 45 deepwater drilling 45 wells 45 carbon sequestration 45 rare earths 45 acreage 45 LNG 45 Nexen 45 Cairn Energy 44 geologically 44 Talisman 44 uranium 44 petroleum 44 Drilling 44 bcf 44 coal mining 44 Eni 44 renewable energy 44 thermal coal 44 Permian Basin 44 Anadarko 44 Range Resources 44 offshore wind 44 crude oil 44 frac 44 renewables 43 BG Group 43 metallurgical coal 43 methane 43 bitumen 43 StatoilHydro 43 probable reserves 43 geological 43 upgrader 43 Powder River Basin 43 vanadium 43 basins 43 Husky Energy 43 exploratory wells 43 drilling rigs 43 Outer Continental Shelf 43 Petroleum 43 Tullow 42 coking coal 42 3D seismic 42 CNOOC Ltd. 42 cellulosic ethanol 42 boe 42 biofuels 42 EnCana Corp.