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UID:1062
SUMMARY:LEC SEMINAR - "Characterizing Crustal Fluid Systems Using Noble Gases"
DESCRIPTION:Crustal fluids, including groundwater, natural gases and oil, play an important role within the Earth. They are also key resources critical to human society. Understanding the processes occurring within crustal fluid systems will provide us with knowledge to enhance energy production (such as shale gas and oil), tackle climate change (such as geological storage of CO2) and control groundwater pollution. \n\nNoble gases have proven to be a versatile tool in the investigation of crustal fluid systems. They are chemically inert and occur in small enough quantities for noble gas production from natural sources to significantly alter their isotopic signature, providing fluid source and age information. Due to the unique noble gas isotopic signatures associated with each potential source it is possible to resolve all inputs to any given crustal fluid system. Within the system their inert, trace nature provides us with a unique opportunity for determining the physical processes controlling the fluid systems. Indeed, the processes controlling noble gases dissolution in water at recharge are understood well enough to derive the temperature of water recharge and past climate information to better than ±0.5oC. \n\nWhile the principles of noble gas tracing of crustal fluid interactions are long established, it is only recently that developments in analytical techniques have enabled these properties to be fully exploited. Several case studies will be presented to illustrate the application of noble gas isotopes in quantifying fluid interactions: (1) The San Juan Basin coalbed methane gas field in New Mexico and Colorado; (2) The Jackson Dome natural CO2 gas deposit in Mississippi; (3) The New Albany shale gas field in the Illinois Basin; (4) The large tight gas sand reservoirs in Utah and Colorado; (5) The Salt Creek oil field in Wyoming. These case studies highlight the powerful potential noble gases have for: \n\nDeveloping physical models to describe interactions among crustal fluid systems\n\nQuantifying the role of groundwater associated with natural gas and oil systems\n\nQuantifying the rate of biogenic methane production\n\nDating the groundwater residence time\n\nTracing the origin of CO2 and identifying the natural mechanisms responsible for CO2 sequestration\n\nDescribing gas migration and communication mechanisms in tight gas/shale gas reservoirs\n\nDeveloping techniques for monitoring fracking projects
DTSTART:20130201T094500
DTEND:20130201T103000
LOCATION:LEC Training Room 1
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