000			01964nab a2200205 4500
005			20260522180425.0
008			260224s2010 xxu
100	1		_aGal, F. _946757
100	1		_aLe Pierres, K. _946758
100	1		_aBrach, M. _946759
245	0	0	_aSurface gas geochemistry above the natural CO2 reservoir of montmiral (Drôme, France), source tracking and gas exchange between the soil, biosphere and atmosphere
260			_cmayo/jun. 2010
270			_a31/08/2010 ; 31/08/2010
300			_a18 p. ; 635-652
520			_aTranscripción del resumen del autor. One of the options considered to mitigate greenhouse gas concentrations in the atmosphere is underground storage of CO2. There is a strong need for enhancing and developing methods that would help throughout the duration life of such underground storage, to ensure the safety and able to monitor the evolution of the injected CO2 plume. Among these, geochemical methods can play an important role. Here, we describe results acquired under the research programme "Géocarbone-Monitoring", partially funded by the French National Research Agency, on the Montmiral natural analogue in South-Eastern France. Other results obtained under the same research programme in the French Massif Central are reported elsewhere in this volume. Spot sampling methods allowing a great geographical coverage and continuous measurements on selected points were undertaken in 2006 and 2007, in order to determine soil gas concentrations and fluxes as well as carbon isotope ratio determinations. One important result is that without any evidence of deep CO2 leakage, both CO2 concentrations and fluxes appear to be higher than can be explained only by biological activities. Further investigations are thus needed to understand the gas evolution better throughout the year.
581			_a4
773	0		_tOil and Gas Science and Technology _g65
942			_cARTICULO _2ddc
999			_c176593 _d176593