Untersuchungen zum Strömungsverhalten und zur Lösungskinetik von Gasen im Mehrphasensystem "Aquifer"

The Local Geometry of Gas Injection into Saturated Homogeneous Porous Media

“…In addition, Ji et al (1993) noted a parabolic shape to the gas plumes as they grew upward from the source. These results were followed by those of Hein et al (1997); Clayton (1998);Semer et al (1998);Brooks et al (1999); Elder and Benson (1999); Lazik et al (2002), and Krauss et al (2003), among others, who also observed similar macro-channel behavior. Of these publications, Brooks et al (1999) discussed the threshold between dendritic and channel behavior, but only to the extent that "a multipore analysis may then seem more appropriate than the single pore analysis presented earlier (in the paper)".…”

“…As well, this implies that the gas-filled pore space is proportional to the discharge, which is precisely the observation of Lazik et al (2002). As mentioned above, for air invading a water filled aquifer, for each 10 m of vertical movement the volume of the gas will double due to compression, which would linearly increase the cross-section of flow.…”

“…The injection of gases below the water table in sedimentary aquifer materials, or sparging, is a method commonly employed to reduce contamination with volatile compounds (e.g., Reddy et al, 1999;Lazik et al, 2002;Reddy and Tekola, 2004), and has been proposed as a method to emplace trapped gas to promote biological processes and to reduce permeability (e.g., Fry et al, 1997;Dror et al, 2004). There have been several very useful articles devoted to observational study of the geometry of gas invasion in sandy materials in homogeneous materials (e.g., Clayton, 1998;Elder and Benson, 1999;Roosevelt and Corapcioglu, 1998).…”