From 3D Seismic Facies to Reservoir Simulation: An Example From the Grane Field

A new

seismic to simulation

workflow is proposed, where the aim is the reduction of the overall turn-around time, from seismic data acquisition to reservoir model building and simulation. To this end, new automated procedures are established: firstly, for discriminating seismic data into three-dimensional seismic facies, and secondly, for building a voxel-based reservoir model.

This chapter is divided into three parts. In the first part, automated three-dimensional seismic facies mapping is discussed, where both the stratigraphic and the structural framework of the seismic data are reflected. The resulting seismic facies are then identified with lithologies by calibration against well data.

In the second part, automated voxel grid extraction for reservoirs is explained. The required input is the voxel size together with the top and bottom horizons delimiting the reservoir extents. The calibrated three-dimensional seismic facies are then used to associate each voxel with porosity and permeability values. This last automated step results in a voxel-based reservoir model.

Finally, in the third part, an application of the new workflow is presented. To this end, a case study for the Grane field is used. The selected simulation scenario models a three-phase reservoir life.