Reservoir Model Types - Reservoir Model Design - page 196

Fig. 6.29 Heterolithics in
the otherwise high N/G of
the Gres d'Annot, outcrops
above Annot town

time the biggest investment decisions have been
made. Even with 4D data, key heterogeneities
may remain sub-seismic.
Reservoir modelling in deep marine systems
therefore requires an understanding of the fine-
scale architectural concepts, steered by an over-
arching understanding of confinement.

reservoir, carbonates are often lumped as one
(as in this chapter), and
￿ Carbonates are seen as 'just difficult.'
The bias towards clastic systems in reservoir
modelling is certainly strong, but the principles
of model design described in Chaps. 1 , 2 , 3 , 4 ,
and 5 apply equally well to all reservoir types.
Are carbonates more difficult to model? Not nec-
essarily, but they do tend to be different, as
reviewed by Burchette ( 2012 ).
For carbonate reservoir modelling, five areas
are highlighted for consideration:
1. Depositional architecture,
2. Pore fabric,
3. Diagenesis,
4. Fractures,

6.6 Carbonate Reservoirs

To the frustration of some sedimentologists, car-
bonate reservoir modelling suffers from two
common labels:
￿ Carbonate systems are as varied as
siliciclastic systems, but whilst much atten-