Table 1 Physical properties and experimental scheme for the rock samples.
From: Permeability regain and aqueous phase migration during hydraulic fracturing shut-ins
Rock sample | Length/cm | Diameter/cm | Porosity/% | Permeability/mD | Shut-ins time/h | Inject volume | Purpose | Lithology |
|---|---|---|---|---|---|---|---|---|
cq001-1 | 5.01 | 2.51 | 10.2 | 0.21 | 6 | 1PV | Permeability evolution | Sandstone |
cq001-2 | 5.06 | 2.53 | 10.6 | 0.25 | 12 | |||
cq001-3 | 5.03 | 2.49 | 11.2 | 0.27 | 18 | |||
cq001-4 | 4.96 | 2.52 | 9.7 | 0.19 | 24 | |||
cq002-1 | 5.51 | 2.51 | 9.3 | 0.11 | Periodically | 0.2 PV | NMR test | Sandstone |
cq002-2 | 5.50 | 2.48 | 9.6 | 0.16 |
