TY - JOUR
T1 - Droplet fragmentation
T2 - 3D imaging of a previously unidentified pore-scale process during multiphase flow in porous media
AU - Pak, Tannaz
AU - Butler, Ian B.
AU - Geiger, Sebastian
AU - Van Dijke, Marinus I.J.
AU - Sorbie, Ken S.
PY - 2015/2/17
Y1 - 2015/2/17
N2 - Using X-ray computed microtomography, we have visualized and quantified the in situ structure of a trapped nonwetting phase (oil) in a highly heterogeneous carbonate rock after injecting a wetting phase (brine) at low and high capillary numbers. We imaged the process of capillary desaturation in 3D and demonstrated its impacts on the trapped nonwetting phase cluster size distribution. We have identified a previously unidentified pore-scale event during capillary desaturation. This pore-scale event, described as droplet fragmentation of the nonwetting phase, occurs in larger pores. It increases volumetric production of the nonwetting phase after capillary trapping and enlarges the fluid-fluid interface, which can enhance mass transfer between the phases. Droplet fragmentation therefore has implications for a range of multiphase flow processes in natural and engineered porous media with complex heterogeneous pore spaces.
AB - Using X-ray computed microtomography, we have visualized and quantified the in situ structure of a trapped nonwetting phase (oil) in a highly heterogeneous carbonate rock after injecting a wetting phase (brine) at low and high capillary numbers. We imaged the process of capillary desaturation in 3D and demonstrated its impacts on the trapped nonwetting phase cluster size distribution. We have identified a previously unidentified pore-scale event during capillary desaturation. This pore-scale event, described as droplet fragmentation of the nonwetting phase, occurs in larger pores. It increases volumetric production of the nonwetting phase after capillary trapping and enlarges the fluid-fluid interface, which can enhance mass transfer between the phases. Droplet fragmentation therefore has implications for a range of multiphase flow processes in natural and engineered porous media with complex heterogeneous pore spaces.
KW - Carbonate rock
KW - Droplet fragmentation
KW - Heterogeneous porous media
KW - Pore-scale imaging
KW - X-ray computed microtomography
UR - http://www.scopus.com/inward/record.url?scp=84923169916&partnerID=8YFLogxK
U2 - 10.1073/pnas.1420202112
DO - 10.1073/pnas.1420202112
M3 - Article
AN - SCOPUS:84923169916
SN - 0027-8424
VL - 112
SP - 1947
EP - 1952
JO - Proceedings of the National Academy of Sciences of the United States of America
JF - Proceedings of the National Academy of Sciences of the United States of America
IS - 7
ER -