Natural Gas Notes
Popular in Environmental Science 111
Popular in Environmental Science
This 2 page Class Notes was uploaded by Kime Howard on Wednesday October 14, 2015. The Class Notes belongs to EVPP111 at a university taught by Dr. Kim Largen in Fall 2015. Since its upload, it has received 29 views.
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Date Created: 10/14/15
Natural Gas Gas mixture 0 Methane I 5090 0 ethane o propane o butane formation 0 found in association with coal and oil 0 source rock I sedimentary rock containing organic material I transforms kerogen gt coaloil gt natural gas I migrates upward into coursegrained reservoir rock I until blocked by a trap or cap rock 0 biogenic I pure methane created at a shallow depth by bacterial anaerobic decomposition of organic matter I swamp gas 0 thermogenic I methane and other gases arise from compression and heat underground I source of the most gas that is extracted commercially types 0 conventional I associated with oil I coarsegrain substrate 0 unconventional I associated with coal beds I finegrained substrates I methane hydrate methane in a crystal lattice of ice molecules occurs in arctic locations and under the sea floor vast amounts could be present don t know how to extract it safely I gas shale natural gas trapped within finegrained shale rock reserves 0 world reserves I Russia I Iran I Qatar I United states 0 How long will they last I Conven onal o extraction drilling wells 60 years unconven onal maybe much longer on shore or off shore hyd rofracking controversial method of extraction of shale gas drill down then drill laterally pipe inserted with holes then injection of water sometimes sand and other chemicals under pressure water and chemicals blow through the holes and fracture the land above and below it issues 0 00000 lots of waste fluid land disruption groundwater contamination disposal of spent fluids increase incidence of earthquakes large consumptive use of water