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• W2150314904 abstract "Renewable energy resources can indisputably minimize the threat of global warming and climate change. However, they are intermittent and need buffer storage to bridge the time-gap between production (off peak) and demand peaks. Based on geologic and geochemical reasons, the North German Basin has a very large capacity for compressed air/gas energy storage CAES in porous saltwater aquifers and salt cavities. Replacing pore reservoir brine with CAES causes changes in physical properties (elastic moduli, density and electrical properties) and justify applications of integrative geophysical methods for monitoring this energy storage. Here we apply techniques of the elastic full waveform inversion FWI, electric resistivity tomography ERT and gravity to map and quantify a gradually saturated gas plume injected in a thin deep saline aquifer within the North German Basin. For this subsurface model scenario we generated different synthetic data sets without and with adding random noise in order to robust the applied techniques for the real field applications. Datasets are inverted by posing different constraints on the initial model. Results reveal principally the capability of the applied integrative geophysical approach to resolve the CAES targets (plume, host reservoir, and cap rock). Constrained inversion models of elastic FWI and ERT are even able to recover well the gradual gas desaturation with depth. The spatial parameters accurately recovered from each technique are applied in the adequate petrophysical equations to yield precise quantifications of gas saturations. Resulting models of gas saturations independently determined from elastic FWI and ERT techniques are in accordance with each other and with the input (true) saturation model. Moreover, the gravity technique show high sensitivity to the mass deficit resulting from the gas storage and can resolve saturations and temporal saturation changes down to ±3% after reducing any shallow fluctuation such as that of groundwater table." @default.
• W2150314904 created "2016-06-24" @default.
• W2150314904 creator A5015605707 @default.
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• W2150314904 date "2014-05-25" @default.
• W2150314904 modified "2023-09-27" @default.
• W2150314904 title "Geophysical assessments of renewable gas energy compressed in geologic pore storage reservoirs" @default.
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• W2150314904 doi "https://doi.org/10.1186/2193-1801-3-267" @default.
• W2150314904 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/4048370" @default.
• W2150314904 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/24936391" @default.
• W2150314904 hasPublicationYear "2014" @default.
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