A clear and detailed understanding of gas migration mechanisms from depth to ground surface is fundamental to choose the best locations for C02 geological storage sites, to engineer them so that they do not leak, and to select the most appropriate monitoring strategy and tools to guarantee public safety. Natural test sites (or "natural analogues") provide the best opportunity to study migration mechanisms, as they incorporate such issues as scale, long-time system evolution, and interacting variables that cannot be adequately addressed with laboratory studies or computer models. To this end the present work examines the migration to surface of deep, naturally produced C02 along various buried and exposed faults in the Latera caldera (central Italy) by integrating structural geology and near-surface gas geochemistry surveys. Results show how gas migration is channelled along discrete, high -permeability pathways within the faults, with release typically occurring from spatially restricted gas vents. Size, distribution, and strength of these vents appear to be controlled by the evolution and deformation style of the fault, which is in turn linked to the rheology of the lithological units cut by the fault. As such gas migration can change drastically along strike. Gas migration in the vadose zone around these vents is also discussed, focussing on how the physical-chemical characteristics of various species (C02, CH4, and He) control their spatial distribution and eventual release to the atmosphere. (c) 2008 Elsevier Ltd. All rights reserved.

Gas migration along fault systems and through the vadose zone in the Latera caldera (central Italy): Implications for CO2 geological storage / Annunziatellis, Aldo; Beaubien, Stanley Eugene; Bigi, Sabina; Ciotoli, Giancarlo; Coltella, Monia; Lombardi, Salvatore. - In: INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL. - ISSN 1750-5836. - STAMPA. - 2:3(2008), pp. 353-372. (Intervento presentato al convegno General Assembly of the European-Geosciences-Union tenutosi a Vienna, AUSTRIA nel APR 15-20, 2007) [10.1016/j.ijggc.2008.02.003].

Gas migration along fault systems and through the vadose zone in the Latera caldera (central Italy): Implications for CO2 geological storage

ANNUNZIATELLIS, Aldo;BEAUBIEN, Stanley Eugene;BIGI, Sabina;CIOTOLI, Giancarlo;COLTELLA, Monia;LOMBARDI, Salvatore
2008

Abstract

A clear and detailed understanding of gas migration mechanisms from depth to ground surface is fundamental to choose the best locations for C02 geological storage sites, to engineer them so that they do not leak, and to select the most appropriate monitoring strategy and tools to guarantee public safety. Natural test sites (or "natural analogues") provide the best opportunity to study migration mechanisms, as they incorporate such issues as scale, long-time system evolution, and interacting variables that cannot be adequately addressed with laboratory studies or computer models. To this end the present work examines the migration to surface of deep, naturally produced C02 along various buried and exposed faults in the Latera caldera (central Italy) by integrating structural geology and near-surface gas geochemistry surveys. Results show how gas migration is channelled along discrete, high -permeability pathways within the faults, with release typically occurring from spatially restricted gas vents. Size, distribution, and strength of these vents appear to be controlled by the evolution and deformation style of the fault, which is in turn linked to the rheology of the lithological units cut by the fault. As such gas migration can change drastically along strike. Gas migration in the vadose zone around these vents is also discussed, focussing on how the physical-chemical characteristics of various species (C02, CH4, and He) control their spatial distribution and eventual release to the atmosphere. (c) 2008 Elsevier Ltd. All rights reserved.
2008
co2 geological storage; faults; gas migration; natural analogue; soil gas
01 Pubblicazione su rivista::01a Articolo in rivista
Gas migration along fault systems and through the vadose zone in the Latera caldera (central Italy): Implications for CO2 geological storage / Annunziatellis, Aldo; Beaubien, Stanley Eugene; Bigi, Sabina; Ciotoli, Giancarlo; Coltella, Monia; Lombardi, Salvatore. - In: INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL. - ISSN 1750-5836. - STAMPA. - 2:3(2008), pp. 353-372. (Intervento presentato al convegno General Assembly of the European-Geosciences-Union tenutosi a Vienna, AUSTRIA nel APR 15-20, 2007) [10.1016/j.ijggc.2008.02.003].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/45204
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