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Climate Change 2016
October 27-29, 2016
Volume 7, Issue 9(Suppl) J Earth Sci Clim Change
ISSN: 2157-7617 JESCC, an open access journal
conferenceseries .com
October 24-26, 2016 Valencia, Spain
World Conference onClimate Change
Laboratory scale monitoring of CO2 sequestration using complex electrical conductivity and seismic
property changes derived by seismic interferometry
Ranajit Ghose, Deyan Draganov, Alex Kirichek and Karel Heller
Delft University of Technology, The Netherlands
In order to realize and maintain a successful CO2 storage endeavor, a program of careful monitoring of the changes in
reservoir properties is necessary. The way the reservoir properties change is generally case-specific, as such modifications
are principally related to the distribution of pores, fluid composition, and the thermodynamic conditions. Of the various
geophysical methods, so far seismic and electrical methods have been primarily used with varying success to monitor
remotely the changes in a carbon capture and storage (CCS) reservoir. However, a quantitative characterization of the dynamic
reservoir properties has remained difficult mainly due to three reasons. First, laboratory calibration of rock-physical models
used to extract the reservoir properties from geophysical data is challenging. Second, quantitative and integrated geophysical
approaches that are specifically sensitive to changes in fluid (supercritical CO2 and brine) saturation, salinity and pressure are
yet to be developed. Third, the difficulty to capture reliably in surface measurements the seismic signature of the changes in a
CCS reservoir without the unwanted effects of overburden changes has been an obstacle. In order to address these issues, we
have developed a laboratory facility where simultaneous seismic and electrical measurements can be performed on a reservoir
rock under realistic pressure and temperature conditions. Changing saturation and salinity could be quantified on dynamic
measurements of complex electrical conductivity. Application of seismic interferometry could resolve changes in seismic
velocity in the reservoir due to fluid substitution. The approach of joint inversion of these two data types can be applicable to
realistic, quantitative field-monitoring.
Biography
Ranajit Ghose is an Associate Professor at Delft University of Technology, The Netherlands. His areas of research interest are high-resolution seismic with focus
on shear wave, near-surface and geotechnical geophysics, quantitative integrated approaches in geophysics, seismic attenuation, poro-elasticity and property
estimation, seismic wave propagation in fractured media and anisotropy and monitoring CO2 sequestration. He is presently the Editor-in-Chief of the journal “Near
Surface Geophysics”.
Ranajit Ghose et al., J Earth Sci Clim Change 2016, 7:9(Suppl)