Conditioning the Population of Reservoir Model Grids with Inverted Seismic Attributes Through an Interative Backloop - Deep Offshore Study

Reservoir modeling is performed by integrated teams of geologists, geophysicists and reservoir engineers. The final grid is a simplified ‘best guess’ of the field being modeled due to limitations in modeling software and interpretation choices. The main features controlling the fluid flow are preserved and all that is considered secondary by the integrated team may be over-simplified. This is risky as elements considered secondary by a reservoir engineer may be important to a geologist and oversights can occur. Interpretation and uncertainty are inherent in each of the steps used to model facies and petrophysical distributions within the grid which filter through to the final reservoir model. The need to verify the final model against some reference to ensure no gross errors have been made during its construction was the driver for developing the seismic backloop technology presented in this paper.