Nonwetting phase residual saturation in sand packs
MetadataShow full item record
We measure residual nonwetting phase saturation in six unconsolidated sands of different average grain sizes. Wealso analyze the pore structure using three-dimensional images from which topologically equivalent pore networks are extracted. The residual saturations range from 10.8% to 13.1%, which is lower than for most consolidated media. Higher porosity is associated with lower residual saturations, while there is little correlation between grain and pore shape and the degree of trapping. We also study layered packs: the residual saturations are reduced compared to comparable homogeneous systems. We discuss the results in the context of capillary trapping during carbon storage in aquifers.
Showing items related by title, author, creator and subject.
Amaechi, B.; Iglauer, Stefan; Pentland, C.; Bijeljic, B.; Blunt, M. (2014)The trapped saturations of oil and gas are measured as functions of initial oil and gas saturation in water-wet sand packs. Analogue fluids—water, octane and air—are used at ambient conditions. Starting with a sand-pack ...
Qi, Q.; Müller, T.; Gurevich, Boris (2016)Quantitative interpretation of time-lapse seismic signatures aims at assisting reservoir engineering and management operations. Time-lapse signatures are thought to be primarily induced by saturation and pressure changes. ...
Pentland, C.; Iglauer, Stefan; El-Maghraby, R.; Okabe, H.; Tsuchiya, Y.; Blunt, M. (2010)Capillary trapping has been identified as a fast and effective method to render injected carbon dioxide (CO2) immobile as disconnected pore-scale droplets surrounded by brine. We measure trapped CO2 saturations in sandstones ...