Related by context. Frequent words. (Click for all words.) 79 shale gas 73 shales 72 shale formations 68 Marcellus shale 66 horizontal drilling 65 coalbed methane 64 Marcellus Shale 64 Shale 62 Haynesville Shale 61 Barnett Shale 61 oil sands 61 hydrocarbon 60 Fayetteville Shale 60 Haynesville 58 hydraulic fracturing 57 drillers 57 drilling 57 Montney 57 coal seams 56 bed methane 56 natural gas 56 fracking 56 horizontal wells 56 Ford Shale 56 Williston Basin 55 hydrocarbons 55 Marcellus 55 tar sands 54 Piceance Basin 53 coal seam 53 Bakken 52 oilsands 52 directional drilling 51 Appalachian Basin 51 EOR 51 wells drilled 51 frac 50 coal seam gas 50 exploratory drilling 50 oil 50 exploration 50 gas condensate 50 bitumen 49 Niobrara 49 fracture stimulation 49 hydrocarbon reserves 48 geologically 48 sands 48 coal 48 deepwater 47 geological 47 gas 47 recoverable reserves 47 wells 47 geothermal 46 Alberta oilsands 46 Encana 46 geologic 46 Drilling 46 mineral 45 rock formations 45 Oil Sands 45 Petrohawk 45 Permian Basin 45 oilfield 45 basins 45 coal gasification 45 potash 45 commerciality 45 wellbore 45 stratigraphic 45 Powder River Basin 44 SAGD 44 XTO 44 CBM 44 prospectivity 44 acreage 44 Range Resources 44 EOG 44 Geothermal 44 oilfields 44 geologists 44 mining 43 EOG Resources 43 lignite 43 uranium 43 deepwater Gulf 43 extraction 43 carbon capture 43 carbon sequestration 43 drilling rigs 43 offshore drilling 43 aquifers 43 vanadium 43 sandstone 43 soda ash 42 Outer Continental Shelf 42 outer continental shelf 42 exploratory wells 42 cellulosic ethanol 42 minerals