Research Article
Mechanism of Permeability Evolution for Reservoir Sandstone with Different Physical Properties
Figure 4
Gradual-cracking process and permeability behavior considering different confining pressure and water pressure valued 2 MPa.
(a) Sandstone without mud (confining pressure 3 MPa) |
(b) Sandstone with mud (confining pressure 3 MPa) |
(c) Sandstone without mud (confining pressure 6 MPa) |
(d) Sandstone with mud (confining pressure 6 MPa) |
(e) Sandstone without mud (confining pressure 9 MPa) |
(f) Sandstone with mud (confining pressure 9 MPa) |
(g) Sandstone without mud (confining pressure 15 MPa) |
(h) Sandstone with mud (confining pressure 15 MPa) |