| Type | Geometry | Thickness | Lithology/texture | Porosity % (permeability md) | Degree of heterogeneity | Reservoir Quality |
|---|---|---|---|---|---|---|
| Progradational shoreface bar | Tens of kilometres long, few kilometres wide, symmetrical in cross section | 5 to 10 metres | Fine to medium grained sandstone | 7-20 | Moderate (vertical discontinuities) | Moderate, decreases downward |
| Transgressive bar/sheet | Tens of kilometers long, few kilometers wide, asymmetrical in cross section | Less than 1 to 4 meters | Coarse-grained to granular sandstone (conglomeratic) | 8-12 (10 to 400) |
Low | Excellent |
| Estuarine channel/valley fill | Few kilometers long, few kilometers wide, channel-like cross section | Usually greater than 10 meters | Variable; fine-grained to granular sandstone to conglomerate | 5-20 (<1 to 1000) |
High (vertical and horizontal discontinuities) | Variable |
Last modified: August 20, 2008
