Geoscience Reference
In-Depth Information
Sandstone Porosity vs Compressional Velocity
6000
Wyllie
5500
Han et al. (1986) (40 MPa) dataset
V
p
5000
4500
4000
Oseberg Qtz cemented
3500
Oseberg Clay cemented
3000
North Sea
(Palaeocene) dataset
Troll 20 Mpa
Troll 5 Mpa
2500
Gulf Coast example
2000
0
0.1
0.2
0.3
0.4
Shallow unconsolidated
example
Porosity
Fig. 5.21
Sandstone compressional velocity vs porosity. Trends based on Dvorkin & Nur
(1995).
Effect of Clay on Compressional Velocity
5000
4500
4000
V
cl
=0
V
cl
=0.1
V
cl
=0.2
V
cl
=0.3
3500
3000
2500
2000
1500
0
0.1
0.2
0.3
0.4
Porosity
Output from Xu-White (1995) model
Fig. 5.22
Effect of clay on compressional velocity (Xu-White model).
