Structural framework and its compartmentalisation within the associated uncertainties: A case study from the Statfjord Reservoir, Northern North Sea

Abstract

The study to define the degree of compartmentalization along with the associated uncertainties has been done to aid the exploration sector to maximize its hidden potentials. Statfjord reservoir as the object of this study provides a robust clastic data which contains six different zones based upon petrophysical analysis. Seismic data interpretation is the core method to generate the structural and surface interpretation, followed by the structural framework modeling to define the juxtaposition along with the segmented fault system. The result shows moderate clay content (Effective Shale Gouge Ratio) ranging between 40% - 60% with 0.3 MD (millidarcy) permeability, which indicates moderately sealing faults. The compartments also considered having two different scenarios concerning its migration pathway. This is because of the limited well data at the reservoir system, therefore, two different Oil to Water Contact (OWC) value has been added (-2717m and -2617m).