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Department of Civil and Environmental Engineering, Princeton University, June 2014
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|Resource title||CO2, Methane, and Brine Leakage through Subsurface Pathways: Exploring Modeling, Measurement, and Policy Options|
|Publication/ source||Department of Civil and Environmental Engineering, Princeton University|
|Date published||June 2014|
|Summary text/ abstract||Subsurface pathways, such as abandoned oil and gas wells and faults, can serve as leakage pathways for CO2 , methane, brine, and other fluids. These pathways allow fluids from deep subsurface formations to migrate into shallow groundwater aquifers or to the atmosphere. To estimate leakage rates and the associated pressure effects on adjacent aquifers, analytical models representing fluid flow in the vicinity of leaky faults are developed in Chapter 2. The incorporation of this kind of fault model in larger basin-wide multi-scale models allows sub-grid-scale effects due to leakage through faults to be captured with improved efficiency. Three of the 19 measured wells are high emitters. Because these high emitters govern the average flux, more field iiimeasurements are needed. Such measurement plans should be aimed at identifying attributes that aid in finding these high emitters. Leakage was found to occur at both plugged and unplugged wells. As such, existing well abandonment regulations in Pennsylvania do not appear to be effective in controlling methane emissions from AOG wells. As a mitigation strategy, inclusion of gases emitted from AOG wells in Pennsylvania's Alternative Energy Portfolio Standard may be valuable for both promoting capture and possible use of the gas as well as for reporting and monitoring of these wells.|
|Library categories||Climate Change, Extr. Energy Climate|
|Added to Free Range Library||22/06/2014|
CO2, Methane, and Brine Leakage through Subsurface Pathways: Exploring Modeling, Measurement, and Policy Options [2.6 megabytes]
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