Ignacio Marzán

Passive Seismic Monitoring of an Experimental CO2 Geological Storage Site in Hontomín (Northern Spain)

Carbon dioxide capture and storage (CCS) has been recognized as a promising option for dealing with emissions from fossil fuel combustion to decrease the release of CO2 into the atmosphere. Through the CCS process CO2 is first separated from flue gases, then it is compressed and transported to the storage site, and finally it is injected into deep underground geologic formations (Benson, 2005; CO2 Capture Project, 2009). The geologic formations that offer secure and long‐term potential for the storage of large amounts of CO2 are gas and oil reservoirs that are depleted or nearing depletion, deep saline aquifers, and unminable coal seams or coalbed methane formations (Jean‐Baptiste and Ducroux, 2003). Deep saline formations offer the largest potential storage capacity, according to global storage capacity estimates (Benson, 2005). They are also promising due to their wider regional coverage and potential proximity to CO2 capture sites (CO2 Capture Project, 2009). The number of research and development projects for underground CO2 storage has increased greatly over the past decade, facilitated by the International Energy Agency Greenhouse Gas (IEAGHG) Research and Development (R&D) Program. Information on all known CSS demonstration projects worldwide can be found at the IEAGHG website (http://www.ieaghg.org/, last accessed September 2012). In this context, the Spanish Foundation “Ciudad de la Energia” (CIUDEN) is developing a CO2 Geological Storage Program in saline aquifers in Spain. One of the main objectives of the program, which is now in its pre‐operational stage, is to set up a technological laboratory, to develop technology, and to test methodologies on CO2 storage operation, with the final goal of making the geological storage environmentally safe and technologically viable. The site selection and characterization studies performed on several target geologic formations have identified a suitable experimental and demonstration …

Curie Point Depth of the Iberian Peninsula and Surrounding Margins. A Thermal and Tectonic Perspective of its Evolution

This work has been supported by the CGL2014-56548-P project funded by the Spanish Ministry of Science and Innovation, 2014 SGR 1595 by Generalitat de Catalunya, and by pro- jects 18KAVW, 463AC01, 18KBVW, and 463AC01 from the University of Salamanca. We acknowledge Getech Group Plc. for providing the magnetic data for the study. Magnetic data are available for purchase from Getech Group Plc (www.getech.com). The EMAG2 data set can be downloaded from http://geomag.org/models/ emag2.html. Massimiliano Melchore is acknowledged for fruitful discussion on the Alboran Domain. We thank Fabio Speranza for the review of an early ver- sion of the manuscript. J. A. is supported by FPI grant BES-2015-071683 from the Spanish Ministry of Science and Innovation. We thank Editor Michael Walter, the Associate Editor Mark J. Dekkers, and two anonymous reviewers for their comments that helped improve the quality of the paper.

3D Elastic Full Waveform Inversion - On Land Study case

Full Waveform Inversion is one of the most advanced processing methods that is recently reaching a mature state after years of solving theoretical and technical issues such as the non-uniqueness of the solution and harnessing the huge computational power required by realistic scenarios. In this work, we present the application of this method to a 3D on-land dataset acquired to characterize the shallow subsurface. The current study explores the possibility to apply elastic isotropic Full Waveform Inversion using only the vertical component of the recorded seismograms. One of the main challenges in this case study remains the costly 3D modeling that includes topography and free surface effects. Nevertheless, the resulting models provide a higher resolution of the subsurface structures than starting models, and show a good correlation with the available borehole measurements.