− | Lateral continuity is typically excellent in braided fluvial reservoirs. The net to gross of these systems is normally very high (>80%), and, as such, these types of reservoirs are usually well connected laterally. In detail, they can be internally complex with intervals of upward-decreasing permeability profiles, but the lack of organized stratification or laterally continuous shales results in braided fluvial reservoirs showing effectively layer-cake geometry and acting as a single integrated reservoir at the larger scale.<ref name=Gallowayandhobday_1996>Galloway, W. E., and D. K. Hobday, 1996, Terrigenous clastic depositional systems: Applications to petroleum, coal, and uranium exploration: New York, Springer-Verlag, 489 p.</ref> | + | [[Lateral]] continuity is typically excellent in braided fluvial reservoirs. The net to gross of these systems is normally very high (>80%), and, as such, these types of reservoirs are usually well connected laterally. In detail, they can be internally complex with intervals of upward-decreasing permeability profiles, but the lack of organized stratification or laterally continuous shales results in braided fluvial reservoirs showing effectively layer-cake geometry and acting as a single integrated reservoir at the larger scale.<ref name=Gallowayandhobday_1996>Galloway, W. E., and D. K. Hobday, 1996, Terrigenous clastic depositional systems: Applications to petroleum, coal, and uranium exploration: New York, Springer-Verlag, 489 p.</ref> |
| Braided river systems normally comprise medium to coarse-grained sands and gravels, and the rock properties can be excellent. Oil recovery factors can be very high in braided river reservoirs, commonly more than 50%.<ref name=Martin_1993>Martin, J. H., 1993, A review of braided fluvial hydrocarbon reservoirs: The petroleum engineer's perspective, in J. L. Best and C. S. Bristow, eds., Braided rivers: Geological Society Special Publication 75, p. 333–367.</ref> Laterally extensive braided river reservoirs tend to be in communication with strong aquifers. | | Braided river systems normally comprise medium to coarse-grained sands and gravels, and the rock properties can be excellent. Oil recovery factors can be very high in braided river reservoirs, commonly more than 50%.<ref name=Martin_1993>Martin, J. H., 1993, A review of braided fluvial hydrocarbon reservoirs: The petroleum engineer's perspective, in J. L. Best and C. S. Bristow, eds., Braided rivers: Geological Society Special Publication 75, p. 333–367.</ref> Laterally extensive braided river reservoirs tend to be in communication with strong aquifers. |