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(Click for frequent words.) 69 deep saline aquifers 67 saline aquifers 66 saline aquifer 66 unmineable coal seams 64 saline formations 62 sequestering CO2 62 geological sequestration 61 Nitrogen N2 61 gasifying coal 60 Tanker spills 59 biomass biogas 58 sequester CO2 58 saline groundwater 58 biogases 58 hydrocarbon reservoirs 58 liquid NGL fractionation 57 seafloor methane 57 geologic sequestration 57 brackish groundwater 57 CarbonSMART ™ enterprise 57 Integrated Carbon Capture 57 Softwood hardwood 57 Hydrocarbons mixture 57 oilsands extraction 57 bicarbonate ions 57 Devonian reef 57 bitumen extraction 57 biogas biomass 57 Hydrogen Sulfide H2S 57 Redwater Alberta 57 extract bitumen 57 liquefying coal 57 Sierras Blancas 57 TrendSetter solar hot 57 soils sediments 57 gypsum byproduct 57 HTL upgrading 56 Cokers convert crude 56 storage CAES 56 Dry cask 56 oilsand 56 Shell Albian Sands 56 liquids fractionation 56 ethane propane butane 56 silicate mineral 56 Brackish water 56 hydrate deposits 56 conventionally recoverable natural 56 sequestering carbon dioxide 56 freshwater aquifers 56 Cordero Rojo mines 56 Opposes drilling 56 coalbed gas 56 shallower Cretaceous 56 Upper Mannville 55 Belle Plaine Saskatchewan 55 polygeneration 55 evaporite 55 drilling muds 55 liquification 55 forest thinnings 55 ethanol bio diesel 55 Bakken shales 55 underground geologic formations 55 Qaidam 55 Auwahi Wind 55 biomasses 55 bitumens 55 Methane hydrates 55 evaporation ponds 55 freshwater aquifer 55 situ bitumen 55 bitumen upgrading 55 geoscientific data 55 geothermal hydroelectric 55 subterranean aquifers 55 turbo expander 55 forestry residues 55 Norne field 55 liquid condensates 55 KINSHASA Congo Fabulous 55 Lustdust 55 Durimu oilfield 55 Cook Inlet Basin 55 Shootaring Canyon Mill 55 Keg River 55 bioconversion 55 Bish Cove 55 nonfood biofuels 55 Uinta basin 55 Devon Jackfish 55 groundwater aquifer 55 Glauconitic 55 CO2 sequestration 55 underground geological formations 55 Kalana Mine 55 Granite Wash formation 55 bagasse cogeneration 55 mercaptans 54 subbituminous coal 54 ethane methane 54 Powder River basin 54 Bluesky formation 54 Coromandel Great Barrier 54 Xstrata Copper Las Bambas 54 Chinchaga prospect 54 Receiving Terminals 54 Weyburn Midale 54 offloading FSO 54 industrial wastewaters 54 Verkhnechonskoye 54 Athabasca tar sands 54 Waterflood 54 slushy crystalline form 54 NIOB interval n 54 terrestrial biosphere 54 Campos Basin offshore 54 fine grained sedimentary rock 54 sequester carbon dioxide emissions 54 subsurface minerals 54 Coalbed methane 54 TSX NAL.UN 54 Ammazzo 54 GreenAngel Energy Corp. 54 Scotford Upgrader 54 leased NGL 54 sulfur dioxide SO2 nitrogen 54 gasify coal 54 #bcf [002] 54 photosynthesis Solazyme does 54 Diluent 54 mixture CWM 54 Spiritwood Station 54 reinjection 54 Domoic acid neurotoxin 54 Bolivia nationalizes 54 Slave Point 54 condensate liquefied petroleum 54 Contaminated groundwater 54 carbonate formations 54 NGLs refined products 54 cenospheres 54 Hueco Bolson 54 cellulose hemicellulose 54 photic zone 54 bbl MMcf 54 coal petroleum coke 54 siliceous sediments 54 boreal ecosystems 54 polypropylenes polyethylenes 54 Peat bogs 54 Kulu copper 54 NGL fractionation transportation 54 Amaruk property 54 sequester carbon dioxide 54 desalinized 54 situ extraction 54 synfuels plant 54 denaturant 54 marketable byproducts 54 coalbed 54 refinable 54 CO2 Sequestration 54 dolostone 54 sequester atmospheric 54 Nithi Mountain 54 Recoverable reserves 54 geological repositories 54 ethane propane 53 Cannery Loop 53 rank coals 53 dry distillers grain 53 Polycyclic aromatic hydrocarbons 53 bottomhole 53 PyStR ™ 53 Oil Recovery EOR 53 Fairydell Bon Accord 53 Ike skews 53 Treated wastewater 53 mono ethylene glycol 53 Foisey Creek 53 Alstom chilled 53 Diatomite 53 Pearsall Shale 53 underground coal seams 53 waterflooding 53 Mexico GOM shelf 53 coal anthracite bituminous 53 CO ₂ 53 steamflood 53 APNewsBreak Bubble 53 bearing stratigraphy 53 clastics 53 multistage frac 53 upflow 53 QGC coal seam 53 sequestration CCS 53 Viola Limestone 53 NYSE Amex LPH Longwei 53 Salar de Atacama 53 Longmen Shan fault 53 filter feeders sucking 53 unconventional hydrocarbon 53 economically extractable 53 transportation fractionation 53 block #/#b 53 synthetic liquid hydrocarbons 53 halogenated gases 53 Roncott 53 nutrients iodine 53 butane isomerization 53 diatomite 53 flowback waters 53 frac sand 53 sulfur oxides nitrogen oxides 53 corrosive fluids 53 Tampen area 53 steel ferroalloys 53 LKC interval n 53 Wescorp H2Omaxx 53 Peru Camisea 53 halite 53 produce isobutanol 53 Tib Lake 53 reinjects 53 Sherridon Property 53 shredded pine bark 53 de nitrification 53 hydrotreaters 53 HTL heavy 53 geophysics trenching 53 acid neutralization 53 Viewfield Bakken 53 Jurassic formations 53 Xietongmen deposit 53 Gumusut 53 Arkutun Dagi 53 Desalting 53 desalinate brackish 53 lacustrine 53 hydraulically fracture 53 Wytowno S 1 53 Waupisoo pipeline 53 Jackpine Mine 53 desalinisation 53 Loma Montosa 53 Mannville CBM 53 Puesto Morales Rinconada Concession 53 boron trifluoride 53 limestone dolomite 53 groundwaters 53 contamination Nishiyama 53 Gros Cacouna Que 53 Cook Inlet basin 53 operated horizontal wells 53 Non unitized 52 coalmine methane 52 subsurface soils 52 frac'ing 52 contaminate aquifers 52 subsurface aquifers 52 sands silts 52 calcium bicarbonate 52 Llanos Orientales 52 Lunguya 52 Fayetteville shales 52 Steckman Ridge 52 Airplanes sprayed 52 ore beneficiation 52 Desulfurization 52 Enviros sue 52 waterfloods 52 frac flowback 52 sylvite 52 Upper Shaunavon 52 sheared mafic 52 forested watersheds 52 Digesters 52 drilling recompletions 52 GOM Shelf 52 VVC Exploration Corporation 52 liquids extraction 52 cherts 52 toxic hydrogen sulfide 52 carbonaceous shale 52 products industries www.urscorp.com 52 ligno cellulosic 52 estuarine habitats 52 batteries flywheels 52 #o API 52 Muskeg River Mine 52 scrubber sludge 52 Pebble Beach Calf 52 Kebabangan 52 geologic formations 52 cadmium cobalt 52 layered sedimentary rock 52 hydrologically connected 52 ethane extraction 52 lignocellulosic biomass 52 carbonate reservoir 52 Alaska Railbelt 52 Qinshui Basin 52 Kitimat LNG Terminal 52 SkyMine ® 52 hydrocarbon accumulations 52 acid sulphate soils 52 sulfur sub bituminous 52 thermochemical processing 52 subsalt layer 52 Artesia Vacuum Trend 52 Yegua sands 52 Åsgard B 52 geosteering 52 shale extraction 52 molten salts 52 ammonia methanol 52 Laricina Energy Ltd. 52 hematite goethite 52 pyrolysis gasification 52 iron titanium vanadium 52 de asphalting 52 Nabors participates 52 Lexaria routinely evaluates 52 Sespe Condor Sanctuary 52 colorless odorless radioactive 52 bitumen extraction plant 52 iso octane 52 Marmaton 52 tar sands bitumen 52 RightTouch ™ capacitive sensing 52 Drunkard Wash 52 UCG syngas 52 Piltun Astokhskoye 52 liquids NGL fractionation 52 surface mineable 52 phosphate ore 52 Villeta T 52 acquifers 52 phosphorous potassium 52 fine grained sandstone 52 Shiranish formation 52 inadvertently puncturing 52 Steam Assisted Gravity Drainage 52 unrisked resource potential 52 asphaltene 52 copper molybdenum silver 52 Geysers geothermal 52 sugar cane bagasse 52 Potassium hydroxide 52 storage offloading vessel 52 Soumber 52 Redoubt Shoal 52 clastic reservoirs 52 overthrust belt 52 uranium ores 52 Azeri Chirag Gunashli offshore 52 lithium boron 52 Urucu 52 Commercially viable 52 floodplains wetlands 52 methane ethane 52 Denver Julesburg DJ 52 IP 5b 52 Huasna 52 Lower Tertiary trend 52 Mike Taugher covers 52 benefication 52 hydro carbons 52 Naryanmarneftegaz 52 Cretaceous Jurassic 52 lithium enriched 52 uphole Cretaceous 52 subsoils 52 Gething Formation 52 Marulk 52 seabed sediments 52 Gething formation 52 inorganic contaminants 52 hypersaline 51 igneous intrusive 51 potash KCl 51 Cheleken contract 51 Tapuli Stora Sahavaara 51 situ leach 51 Temascaltepec 51 Carlyss La. 51 Jellico coal 51 boiler flue 51 Bacton terminal 51 Villeta U 51 arsenic selenium 51 sequestered CO2 51 shale tar sands 51 Kutei Basin 51 Tumipampa exploration properties 51 minable reserves 51 algae biomass 51 Organic Rankine Cycle ORC 51 Cretaceous sandstone 51 Mancos Shale 51 raffinate 51 Anaerobic digesters 51 Harweel 51 arenite 51 dolomitized 51 bacterial mats 51 methane seeps 51 geologic geophysical 51 volcanoclastic rocks 51 South Meager Geothermal 51 Berea sandstone 51 Mnazi Bay 51 undiscovered hydrocarbon 51 Nexterra gasification technology 51 biohydrogen 51 Balarat Project 51 storage casks 51 Piltun 51 cleanest burning 51 Zheng Guang gold 51 Canadon Seco 51 permeability reservoir 51 volcanic tuffs 51 Jonah Pinedale 51 Nechako Basin 51 aerially extensive 51 drillsites 51 bioindustrial markets 51 Felsic 51 Gas Condensate 51 Liuhuanggou Project 51 Gas hydrates 51 Ca Rong Do 51 Bienfait mines 51 wetland riparian 51 hydrochloric acid HCl 51 Carbon sequestration 51 NYFCC awarded 51 porosity permeability 51 Methane CH4 51 aliphatic hydrocarbons 51 Bergermeer Gas Storage 51 Barrhead Alberta 51 PCOR Partnership 51 Kreido Biofuels 51 Flemish Pass 51 Canadon Seco formation 51 ONGC Hazira 51 excrete methane 51 Sodium Potassium 51 Kivu Graben 51 desalting 51 Marten Mountain 51 vacuum distillation 51 nahcolite 51 sodium hydrosulfide 51 Palen Solar 51 rainwater catchments 51 coal seams coalbed methane 51 pediment gravels 51 tidally influenced 51 OGX 2A 51 Arctic Coastal Plain 51 basalt formations 51 dissolved oxygen pH 51 anthropogenic carbon dioxide 51 leave NoWaste TM 51 impermeable shale 51 megawatt cogeneration plant 51 subsalt cluster 51 Molybdenum Mine 51 Sulfur Recovery 51 Suncor oilsands 51 Albacora Leste 51 geophysics prospecting 51 emitting fossil fuels 51 geology geophysics 51 liquids CTL plant 51 inorganic salts 51 Titov oilfields 51 bauxite residue 51 Antrim shale 51 gold copper porphyry 51 alluvials 51 dimethyl sulphide 51 recompleting 51 converting cellulose 51 Beaverhill Lake 51 Yoquivo 51 fracing fluids 51 Shell Scotford 51 demineralised water 51 Block #/#a [002] 51 Thelon Basin Nunavut 51 insulating foams 51 PyStR TM 51 Yamana Pilar Au 51 Los Bronces Los Pelambres 51 desalter 51 sequesters carbon dioxide 51 Hushamu 51 #km# [001] 51 GreenFire 51 Cancen Oil Canada 51 onshore Chicontepec 51 St Lawrence Lowlands 51 Formic acid 51 Espírito Santo Basin 51 Volcan Project 51 basal sands 51 sedimentation ponds 51 corn stover switchgrass 51 nonhazardous wastes 51 tailings basin 51 Cusiana 51 Khvalynskoye 51 riparian woodlands 51 potash brine 51 Environmentally sensitive 51 Varandey terminal 51 lithium vanadium 51 Twangiza Main 51 Soumber deposit 51 Nariin Sukhait 51 unburned hydrocarbons carbon monoxide 51 thermochemical conversion 51 Quifa block 51 salt caverns 51 Late Paleozoic 51 Thevenard Island 51 algal biomass 51 Fully ridding 51 porphyritic intrusive 51 butane blending 51 Visure 1X 51 reusing wastewater 51 economically recoverable coal 51 Caldita 51 Haynesville Shale formation 51 Anuri kimberlite 51 #,#,# cu ft 51 Piceance basin 51 Svartsengi 51 dichloroethane 51 groundwater contaminant 51 Lake Mahinerangi 51 pulp CIP 51 pelletization 51 Kakut 51 baseload renewable 51 earths crust 51 processing transporting terminalling 51 Populist uprisings swept 51 units EESU 50 granodiorite porphyry 50 Aneth Field 50 Goldpines North 50 complementary agronomy 50 irrigations systems 50 wind biomass geothermal 50 Ucayali Basin 50 fine grained sedimentary 50 nouvelles.com develops constructs 50 Cordova Embayment 50 condenser tubes 50 ferruginous 50 deoxygenation 50 Wona SW Zone 50 Clarence Moreton 50 gasifies coal 50 hydrokinetic energy 50 lubricant POL Rs 50 oligotrophic 50 Cardon IV 50 Qualified Person overseeing Lydian 50 Gasfield 50 ovens furnaces 50 Shale Formation 50 propylene fractionation 50 Barail 50 carbonate sediments 50 carnallite 50 pyrometallurgical 50 unrisked recoverable 50 Mothae pipe 50 Carbon dioxide CO2 50 Schels expects 50 BEB Erdgas und 50 groundwater aquifers 50 stage Serrote Deposit 50 Adnams Bio Energy 50 residue cellulosic biomass 50 syncrude 50 Shipping Limited HKSE 50 photosynthetic microorganisms 50 Shale formations 50 Gordondale 50 Haynesville Fayetteville 50 hydrofluorocarbons HFCs perfluorocarbons PFCs 50 Scotford upgrader 50 deepwater subsalt 50 calcium sulphate 50 geologic hydrologic 50 cited krypton strontium 50 Mancos shale 50 subbasin 50 Ricinus 50 unconventionals 50 naturally occurring radium 50 injectants 50 NGL extraction 50 hydraulically fracturing 50 Mangahewa 50 Tar sands 50 thermal hydrolysis 50 gravel quarries 50 calcic 50 zinc rechargeable 50 geophysics geology 50 contiguous acreage 50 autonomous Xinjiang Uyghur 50 gluconic acid 50 Sergipe Alagoas 50 miscible flood 50 cryogenic refrigeration 50 desulfurizer 50 Seafloor 50 DeepWave SM Technology 50 hydro fracturing 50 Niakuk 50 basalt flows 50 J1B 50 bo d 50 pinyon juniper 50 sedimentary deposits 50 impermeable liner 50 Peach Bottom Limerick 50 Whiting Refinery 50 Ante Creek 50 Pembina Cardium horizontal 50 spokeswoman Rhona DelFrari 50 dolomites 50 sedex 50 air sparging 50 undiscovered recoverable 50 geophysical logs 50 Atikwa Lake property 50 Atoka formations 50 Company Rentech SilvaGas 50 calcrete hosted 50 methanation 50 Upper Miocene 50 wastewater pretreatment 50 barium arsenic 50 alluvial gravel 50 Boomerang massive sulphide 50 securityholder approvals 50 Carbonera C 50 tailing impoundment 50 topographical characteristics 50 Kitsault molybdenum 50 geo sequestration 50 flake graphite 50 oilsands bitumen 50 dinitrogen 50 lithological contacts 50 Patchawarra Formation 50 Succinic acid 50 Fracture stimulation 50 dredged sediments 50 olivines 50 tritium contaminated 50 Pampa Melchorita 50 Keathley Canyon block 50 tidal geothermal 50 Eskay Creek Silbak Premier 50 blanches dry 50 catalyze reactions 50 artificial photosynthetic systems 50 GHG emitted 50 Contaminated soil 50 calcareous soils 50 convert cellulosic biomass 50 photosynthetic organism 50 Petromax 50 foreland 50 microbial decomposition 50 Alaskite 50 geological formations 50 recharge underground aquifers 50 Hauraki Region 50 commercially mineable 50 Tortigny deposit 50 multiple biomass feedstocks 50 biogenic 50 Desulphurization 50 Fracing 50 Sunniland Trend 50 Devonian shale 50 sandstone aquifer 50 gassification 50 existing wellbores 50 respired 50 Sleeping Giant mill 50 ozone O3 50 Cauchari Olaroz 50 manmade greenhouse gas 50 Deepwater Tano License 50 subglacial lake 50 immiscible 50 projects streamside buffer 50 Ofrima 50 refrigerant compressor 50 Cambrian Ordovician 50 Piceance Basin Colorado 50 butadiene extraction 50 Lengai 50 methane CMM 50 Azulitas 50 digestor 50 Oligocene reservoir 50 benzenes 50 Goliat FPSO 50 Nenets Autonomous District 50 Dear EarthTalk Are 50 Espirito Santo Basin 50 silicate rocks 50 please visit www.datadomain.com 50 Purifier TM 50 wet scrubber 50 sylvinite 50 Clearford SBS TM 50 Kalegran 50 Kauther gas 50 extract coalbed methane 50 JP8 jet fuel 50 Godah # 50 Khuff 50 regassified 50 Chemchemal gas 50 hydro biomass 50 IPIC invests 50 ferrous alloys 50 subsurface 50 Nukhul 50 C1 C4 50 leaching toxins 50 Ostracod 50 steamfield 50 Lithium Potash Brine 50 terminalling storage 50 TSX VENTURE ZED specializes 50 Nitric acid 50 isobutene 50 porous sandstone 50 soil carbon sequestration 50 electrostatic precipitator ESP 50 potassium salts 50 propane propylene 50 spokeswoman Tisha Petteway 50 Aquifers 50 multi frac 50 manganese carbonate 50 reduces NOx emissions 50 Methane hydrate 50 phosphogypsum 50 Albeni Falls Dam 50 nickel PGM 50 phyllosilicate 50 #ktpa 50 olivine rich 50 oxyfuel combustion 50 AOP Worldwide 50 OJSC Rosneft Oil 50 potassium sulfate 50 technologically advanced flywheel 50 RedWater 50 OrCrude TM 50 feedlot manure 50 Kutai Basin 50 Elm Coulee 50 structural stratigraphic 50 Neocomian 50 gasified coal 50 Reconcavo 50 downhole pumps 50 RenDiesel fuel 50 Kvitebjorn 50 plantlike bacteria 50 nitrogen oxides NOx emissions 50 copper sulphide 50 desalinating sea water 50 Chayvo field 49 geothermic 49 anaerobic lagoon 49 admiral asks 49 Goliad ISR 49 Seigneurie de Beaupre 49 #/#-# S [002] 49 ultra deepwater floaters 49 offshore Krishna Godavari 49 #mln ton 49 Biomethane 49 Eromanga Basin 49 swine manure 49 tetrahydrofuran 49 subsurface geology 49 geologic basins 49 particulate matter nitrogen oxides 49 potentially open pittable 49 Energtek Natural Gas 49 porpoise vaults 49 trichloroethene TCE 49 molecular sieve 49 Asterisks indicate required 49 Biodegradable plastics 49 Lithium Brine 49 salt domes 49 Kaiso Tonya 49 LFGTE 49 particulate contaminants 49 colorless flammable liquid 49 Enzyme Leach 49 floatation mill 49 ARID tool 49 clastic 49 recoverable bitumen 49 Riparian Areas 49 refining smelting fabricating 49 chemisorption 49 manganese oxides 49 cow belches 49 Lobito Tomboco 49 MagMetals 49 Apoteri K 2 49 Lumsden Potash 49 uranium molybdenum rhenium 49 scrub shrub 49 caustic soda chlorine 49 Yukon Tanana 49 hydrochloric acid leaked 49 depleted aquifers 49 Adequate ventilation 49 Plainwell Dam 49 asphaltenes 49 carbonyl sulfide 49 gasifying 49 Cascade Chinook 49 Licence PL# 49 salt dome caverns 49 Western Sedimentary Basin 49 volcanic massive sulphide 49 drilling coring 49 sludge digestion 49 railcar unloading 49 Stratospheric ozone 49 Chandgana Khavtgai 49 bioaerosol 49 CBNG 49 ROM ore 49 Longshot Ridge copper 49 Stikine Arch 49 Polluted runoff 49 Gryphon Exploration 49 desulfurization unit 49 hydrometallurgy 49 downhole drilling 49 streambank stabilization 49 Separation DMS 49 Hoshia 49 Pumpernickel Valley 49 lignocellulosic feedstocks 49 #MWe [002] 49 Cerro Ccopane property 49 Harmattan Complex 49 offloading FPSO 49 hydrocarbon liquids 49 Nemegosenda Project 49 unconventional reservoirs 49 Cooper Eromanga Basins 49 Umatilla Basin 49 Original grist mill 49 geochronology 49 Shell Scotford refinery 49 Activox ® 49 magmatic hydrothermal 49 Joffre Alberta 49 unconventional shales 49 PCG synthesis 49 West Cedartree Gold 49 open pitable 49 wax emulsions 49 Chayvo 49 Caddo Pine 49 Belridge 49 nonrenewable fossil fuels 49 geological repository 49 DENVER BRONCOS Released 49 hydrocarbons 49 MICHAEL REYNOLDS 49 Sodium cyanide 49 GHU ® 49 Gramalote property 49 Quifa #X 49 Navajo Sandstone 49 Chicot Aquifer 49 methane hydrate deposits 49 Cardium formation 49 Dussafu 49 hydrokinetic technologies 49 Zhana Makat Field 49 polyester resins alkyd resins 49 H2Omaxx 49 Coal gasification 49 subsurface geologic 49 Trademarked Enviropigs whose 49 photosynthetic apparatus 49 gabbro dykes 49 Hydro Chem 49 PetroChina Daqing 49 methane CH4 49 tarry crude 49 kimberlitic bodies 49 woodwaste 49 Namur Sandstone 49 carcinogenic toxins 49 Kali Kuning 49 Sheep Creeks 49 Macasty shale 49 Greater Angostura 49 desalted 49 Fuel Fabrication Facility 49 Kuparuk River 49 quartz latite 49 erosion sedimentation 49 Kitikmeot Region 49 NGRN 49 situ leach uranium 49 depleting fossil 49 Breccia Ridge 49 Carbonyl 49 perfluorocarbon PFC 49 abyssal plain 49 turbidite 49 demineralized water 49 silts 49 Montney shale gas 49 microbialites 49 produce zinc calcine 49 gross unrisked prospective 49 nutria ate 49 Vigdis fields 49 re gassified LNG 49 biofiltration 49 FAR WEST TEXAS 49 Lower Mattagami 49 patented VRB 49 Tintaburra Block 49 pipelines LNG terminals 49 fluidized 49 Simuku 49 Boxey Point 49 deepwaters 49 Nanticoke Generating Station 49 EOR 49 offloading vessel FPSO 49 Barrick Veladero 49 salt cavern 49 Inc. www.rentechinc.com incorporated 49 Montney shale plays 49 Ambrex 49 Wabiskaw 49 Montney Doig 49 Verkhnechonsk 49 solar biomass geothermal 49 Carbon monoxide byproduct 49 Carbonaceous 49 hydrogen chloride HCl 49 chloride salts 49 convert syngas 49 Wildmere 49 brown soupy floodwater 49 unbooked resource potential 49 situ combustion 49 boilers incinerators 49 depositional environment 49 palaeo channel 49 bearing hydrothermal 49 spatially referenced 49 Nemegosenda 49 Teepee Creek 49 arsenic barium 49 Kai Kos Dehseh 49 Baxter Shale 49 carbon dioxide sequestration 49 hydrocarbon feedstock 49 coalbed methane CBM 49 added Stengell