Abstract
We have measured the streaming potential in water-wet sandstones during both drainage and imbibition, and demonstrate that it behaves differently in oil/brine and gas/brine displacements. During drainage, the streaming potential remains significantly greater than zero at the irreducible water saturation in oil/brine displacements, but falls to zero in gas/brine displacements. During imbibition, the streaming potential at partial saturation in oil/brine displacements exceeds that measured at saturation, but not in gas/brine experiments. Our results have application to streaming potential measurements in the vadose zone, hydrocarbon reservoirs, contaminated aquifers and during CO2 sequestration.
Original language | English |
---|---|
Article number | L01301 |
Pages (from-to) | 1-7 |
Number of pages | 7 |
Journal | Geophysical Research Letters |
Volume | 38 |
Issue number | 1 |
Early online date | 7 Jan 2011 |
DOIs | |
Publication status | Published - 16 Jan 2011 |