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Jana Börner

The Impact of CO 2 on Electrical Rock Properties Laboratory experiments for the monitoring of carbon dioxide storage in deep groundwater reservoirs. Jana Börner . 19.07.2013. Outline. Geophysics

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Jana Börner

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  1. The Impact of CO2on Electrical Rock PropertiesLaboratory experiments for the monitoring ofcarbon dioxide storage in deep groundwater reservoirs Jana Börner 19.07.2013

  2. Outline • Geophysics • Motivation and Monitoring scenario in CO2sequestration • Experimental set-up • Laboratory work • Outlook TU Bergakademie Freiberg | Institut für Geophysik und Geoinformatik| Professur für Angewandte Geophysik | Gustav-Zeuner-Str. 12, 09599 Freiberg | 03731 / 39-2637 | www.tu-freiberg.de | Jana Börner | 19.07.2013

  3. Geophysics … science concerned with the exploration of the earth‘s interior by means of physical methods … the only non-invasive way of investigating the earth Scale: 10+03 km to 10-09 m physical processes whole earth/ regional geology geological formation drill core rock pore space TU Bergakademie Freiberg | Institut für Geophysik und Geoinformatik| Professur für Angewandte Geophysik | Gustav-Zeuner-Str. 12, 09599 Freiberg | 03731 / 39-2637 | www.tu-freiberg.de | Jana Börner | 19.07.2013

  4. Geophysics … provides methods and technologies for every branch of physics Seismics/ Seismology Geoelectrics/ Electromagnetics TU Bergakademie Freiberg | Institut für Geophysik und Geoinformatik| Professur für Angewandte Geophysik | Gustav-Zeuner-Str. 12, 09599 Freiberg | 03731 / 39-2637 | www.tu-freiberg.de | Jana Börner | 19.07.2013

  5. Geophysics Petrophysics … the material sciences among geosciences What are the physical characteristics of rocks? Where do they come from? How do they relate to material properties relevant for other technologies and disciplines? measurable/determinable physical quantities relevant rock properties rock type density water/oil/gas content hydraulic permeability porosity temperature … reflexivity velocity of propagation electrical conductivity electrical permittivity gravity … Archie‘s law (1942) TU Bergakademie Freiberg | Institut für Geophysik und Geoinformatik| Professur für Angewandte Geophysik | Gustav-Zeuner-Str. 12, 09599 Freiberg | 03731 / 39-2637 | www.tu-freiberg.de | Jana Börner | 19.07.2013

  6. Motivation and Monitoring scenario in CO2 sequestration CCS – Carbon Capture and Storage capture cleaning compaction transport storage GeoTechnologien TU Bergakademie Freiberg | Institut für Geophysik und Geoinformatik| Professur für Angewandte Geophysik | Gustav-Zeuner-Str. 12, 09599 Freiberg | 03731 / 39-2637 | www.tu-freiberg.de | Jana Börner | 19.07.2013

  7. Motivation and Monitoring scenario in CO2 sequestration • shallow aquifers: • fresh water • low salt content • low electrical conductivity • deep aquifers: • brine • high salt content • high electrical conductivity CO2(dis) aquifer 200 m leakage caprock free CO2 CO2(dis) aquifer 4000 m TU Bergakademie Freiberg | Institut für Geophysik und Geoinformatik| Professur für Angewandte Geophysik | Gustav-Zeuner-Str. 12, 09599 Freiberg | 03731 / 39-2637 | www.tu-freiberg.de | Jana Börner | 19.07.2013

  8. Experimental assembly • 2 types of experiments • dynamic • static • fluid samples • dissolution and dissociation of CO2 • wait for equilibrium • change in fluid conductivity • water saturated sand samples • flow-through • CO2 replaces pore water in-situ conditions TU Bergakademie Freiberg | Institut für Geophysik und Geoinformatik| Professur für Angewandte Geophysik | Gustav-Zeuner-Str. 12, 09599 Freiberg | 03731 / 39-2637 | www.tu-freiberg.de | Jana Börner | 19.07.2013

  9. Experimental assembly TU Bergakademie Freiberg | Institut für Geophysik und Geoinformatik| Professur für Angewandte Geophysik | Gustav-Zeuner-Str. 12, 09599 Freiberg | 03731 / 39-2637 | www.tu-freiberg.de | Jana Börner | 19.07.2013

  10. Experimental set-up autoclave measuring cell 4 electrodes configuration passage for recording σ, p, T 400 bar 80°C TU Bergakademie Freiberg | Institut für Geophysik und Geoinformatik| Professur für Angewandte Geophysik | Gustav-Zeuner-Str. 12, 09599 Freiberg | 03731 / 39-2637 | www.tu-freiberg.de | Jana Börner | 19.07.2013

  11. Measuring cell current supply voltage recording I U TU Bergakademie Freiberg | Institut für Geophysik und Geoinformatik| Professur für Angewandte Geophysik | Gustav-Zeuner-Str. 12, 09599 Freiberg | 03731 / 39-2637 | www.tu-freiberg.de | Jana Börner | 19.07.2013

  12. Solubility and dissociation of CO2 in saline water 2-stage dissociation of carbonic acid H2CO3 K1 and K2 depend on • pressure • temperature • salinity solution conductivity additionally depends on • ion concentrations • interaction of ions pressure p [MPa] TU Bergakademie Freiberg | Institut für Geophysik und Geoinformatik| Professur für Angewandte Geophysik | Gustav-Zeuner-Str. 12, 09599 Freiberg | 03731 / 39-2637 | www.tu-freiberg.de | Jana Börner | 19.07.2013

  13. Electrical rock propertiesDetermination of conductivity contrast for one p/T-condition TU Bergakademie Freiberg | Institut für Geophysik und Geoinformatik| Professur für Angewandte Geophysik | Gustav-Zeuner-Str. 12, 09599 Freiberg | 03731 / 39-2637 | www.tu-freiberg.de | Jana Börner | 19.07.2013

  14. Electrical rock propertiesResults and comparison with data and empirical representation (25°C) adaptation accounts for the change of σw due to CO2(dis) characteristics of process moving towards equilibrium good agreement between data, empirical representation and modelling results salinity increase Börner et al. (2013) TU Bergakademie Freiberg | Institut für Geophysik und Geoinformatik| Professur für Angewandte Geophysik | Gustav-Zeuner-Str. 12, 09599 Freiberg | 03731 / 39-2637 | www.tu-freiberg.de | Jana Börner | 19.07.2013

  15. Summary and Outlook • Geophysical methods are essential for investigating the earth‘s interior and for monitoring geotechnologies • laboratory investigations provide petrophysical knowledge • CO2affects electrical rock properties by • replacing the pore water • dissolving into the pore water • … • monitoring the CO2 injection • leakage detection method TU Bergakademie Freiberg | Institut für Geophysik und Geoinformatik| Professur für Angewandte Geophysik | Gustav-Zeuner-Str. 12, 09599 Freiberg | 03731 / 39-2637 | www.tu-freiberg.de | Jana Börner | 19.07.2013

  16. Summary and Outlook • next steps: • study the influence of • temperature (done) • salt content • salt type • study injection and fluid replacement process • complete model • final aim: • generalizable data set and formulation of relevant effects • ready for and easy-to-use in operation TU Bergakademie Freiberg | Institut für Geophysik und Geoinformatik| Professur für Angewandte Geophysik | Gustav-Zeuner-Str. 12, 09599 Freiberg | 03731 / 39-2637 | www.tu-freiberg.de | Jana Börner | 19.07.2013

  17. Summary and Outlook • Thank you for your attention! TU Bergakademie Freiberg | Institut für Geophysik und Geoinformatik| Professur für Angewandte Geophysik | Gustav-Zeuner-Str. 12, 09599 Freiberg | 03731 / 39-2637 | www.tu-freiberg.de | Jana Börner | 19.07.2013

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