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| | 講演要旨(英文) | | Long term CO2 retention is essential to successful geologic carbon sequestration. Factors influencing long term reservoir integrity include coal seam continuity, coal seam depth, cap rock integrity, the presence of breaching faults and fracture zones, injection pressure and long term response of coal to CO2 injection. Preliminary risk assessment was undertaken in a small area along the southern margin of the Northern Appalachian coal basin. 2D seismic data reveal that the area sits over border faults of an early Paleozoic failed-rift. Movement along these faults continued intermittently through time and produced shallow low relief structures that post date deposition of coal bearing strata. Geomechanical simulations reveal the possibility for small vertical heave in response to CO2 injection and low values of computed injection volume. The study indicates the presence of potential risk to long term sequestration in some areas of this foreland coal basin. |
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