Journal ArticleDOI
Surface-downhole electrical resistivity tomography applied to monitoring of CO2 storage at Ketzin, Germany
Peter Bergmann,Cornelia Schmidt-Hattenberger,Dana Kiessling,Carsten Rücker,Tim Labitzke,Jan Henninges,Gunther Baumann,Hartmut Schütt +7 more
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In this paper, a permanent electrode array has been deployed in three wells to image CO2 injected at the pilot storage Ketzin, Germany, and the results showed that the lateral extent of the related resistivity signature indicated a preferential CO2 migration toward the northwest.Abstract:
Surface-downhole electrical resistivity tomography (SD-ERT) surveys were repeatedly carried out to image CO2 injected at the pilot storage Ketzin, Germany. The experimental setup combines surface with downhole measurements by using a permanent electrode array that has been deployed in three wells. Two baseline experiments were performed during the site startup and three repeat experiments were performed during the first year of CO2 injection. By the time of the third repeat, approximately 13,500 tons of CO2 had been injected into the reservoir sandstones at about 650 m depth. Field data and inverted resistivity models showed a resistivity increase over time at the CO2 injector. The lateral extent of the related resistivity signature indicated a preferential CO2 migration toward the northwest. Using an experimental resistivity-saturation relationship, we mapped CO2 saturations by means of the resistivity index method. For the latest repeat, CO2 saturations show values of up to 70% near the injectio...read more
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Advances in Measuring the Environmental and Social Impacts of Environmental Programs
TL;DR: In this article, the authors highlight the key components of these advances and characterizes the way in which they contribute to better evaluations of the environmental and social impacts of environmental programs, and emphasize that a solid understanding of the advances is required before environmental scholars and practitioners can begin to collect the relevant data, analyze them within credible research designs, and generate reliable evidence about the effectiveness of the myriad proposed solutions to the world's environmental and soc...
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Carbon Dioxide Capture and Storage: Issues and Prospects
TL;DR: In this article, a review explores why and discusses critical conditions for CO2 capture and storage to emerge as a viable mitigation option, including the absence of government action on climate change, economic crisis-induced low carbon prices, public skepticism, increasing costs, and advances in other options including renewables and shale gas.
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Advances in interpretation of subsurface processes with time-lapse electrical imaging
TL;DR: In this paper, the authors outline the utility of electrical geophysical methods for time-lapse imaging of hydrological, geochemical, and biogeochemical processes, focusing on new instrumentation, processing, and analysis techniques specific to monitoring.
Journal ArticleDOI
Quantitative temperature monitoring of a heat tracing experiment using cross-borehole ERT
Thomas Hermans,Samuel Wildemeersch,Pierre Jamin,Philippe Orban,Serge Brouyère,Alain Dassargues,Frédéric Nguyen +6 more
TL;DR: In this article, electrical resistivity tomography (ERT) was used to estimate the temperature in an alluvial aquifer using cross-borehole time-lapse ERT, and the results of ERT were transformed into temperature using calibrated petrophysical relationships.
Journal ArticleDOI
Monitoring of saturation changes and salt precipitation during CO2 injection using pulsed neutron-gamma logging at the Ketzin pilot site
TL;DR: In this paper, an extended pulsed neutron-gamma (PNG) saturation model for NaCl-brines is developed and applied to a time-lapse PNG monitoring data set from the Ketzin site.
References
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Imaging and characterisation of subsurface solute transport using electrical resistivity tomography (ERT) and equivalent transport models
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