Page 392 - Hydrocarbon Exploration and Production Second Edition
P. 392
Risk Analysis 379
project cost $
Static
Structure
Reservoir Properties
Sand Connectivity
"Thief" Zones
Fault Compartments
Dynamic
Relative Permeabilities
Aquifer Behaviour
Well Productivity
(Hydraulic Fractures,
Condensate Drop-out, WellType)
Fluid Composition
- reserves +
Figure 15.15 Spider diagram showing impact of subsurface uncertainties.
a. BG b. BG
MS MD MS MD
concept concept
% - base case outcome + %
% - base case outcome + % low case base case high case
Figure 15.16 Base case-dominated approach to uncertainty handling.
surfaces, or petrophysical values such as net:gross ratios or porosity values measured
at the wells. The technique can accommodate inter-dependencies between para-
meters such as permeability dependency on porosity. By varying the interpolation
methods, boundary conditions and the dependencies, many realisations can be
