Data report: permeability measurements under confining pressure, Expeditions 315 and 316, Nankai Trough.

T. Reuschlé (1)

1 IPGS - Institut de physique du globe de Strasbourg

Permeability of six samples from sites C0001 and C0006 were measured in a triaxial cell under effective hydrostatic confining pressure from 1 to 30 MPa. Our results indicate that the initial permeability at 1 MPa of effective confining pressure ranges from 4.6e-18 to 1.8e-19 m2 depending on depth. Actually permeability decreases with increasing depth also corresponding to a decrease of porosity from 62 to 43%. The permeability vs. depth trend is similar for both sites. When the effective confining pressure is increased from 1 to 30 MPa, the permeability decreases for all samples, a decrease interpreted by microfracture closure. However this trend shows some variability indicating a finer microstructural control depending on the lithological origin of the sample.

Domaines: Géophysique [physics.geo-ph]; Géophysique [physics.geo-ph]; Milieux et Changements globaux

T. Reuschlé. Data report: permeability measurements under confining pressure, Expeditions 315 and 316, Nankai Trough.. Proceedings IODP, 2011, 314/315/316, pp.1-17. ⟨10.2204/iodp.proc.314315316.205.2011⟩. ⟨hal-00863877⟩