Using a 4-D Synthetic Model Derived from Outcrop Interpretation to Optimize Reservoir Characterization: An Integrated Approach

Tristan Euzen, Geology-Geochemistry, Institut Français du Pétrole, 1 & 4, Avenue de Bois-Préau, Rueil-Malmaison Cedex, 92506, France, phone: 00 33 147527225, fax: 00 33 147527067, tristan.euzen@ifp.fr, Aline Bourgeois, Geophysics, Institut Français du Pétrole, 1 & 4 Avenue de Bois-Préau, Rueil Malmaison Cedex, 92506, France, Karine Labat, Geophysics, Institut Français du Pétrole, 1 & 4 avenue de Bois-Préau, Rueil-Malmaison Cedex, 92506, France, Valerie Langlais, Reservoir Ingineering, Institut Francais du Petrole, 1 & 4 Avenue de Bois-Préau, Rueil-Malmaison Cedex, 92506, France, Remi Eschard, Geology-Geochemistry, Institute Francais du Petrole, 1 & 4 Avenue de Bois Preau, Rueil-Malmaison Cedex, 92506, France, and Thierry Tonellot, Geophysics, Institut Francais du Pétrole, 1 & 4 Avenue de Bois-Préau, Rueil-Malmaison Cedex, 92506, France.

Reservoir monitoring using 4D seismics is becoming increasingly important for the management of hydrocarbon fields. The visualization of the reservoir properties changes during production (saturation, pressure…) using seismic data is nowadays a key decision tool to optimize well development plan and well design. However, the workflow for optimizing the reservoir management remains complex, since it requires the integration of tools and techniques designed for geologists, geophysicists and reservoir engineers.

This poster present preliminary results of the construction of a 4D synthetic model, based on the detailed 3D interpretation of an outcrop of a turbiditic channel complex (Pab Fm., Pakistan). A fine-scale 3D geo-cellular model was built and fill with sedimentary facies and petrophysical and elastic properties, using a geostatistical approach. Full-wave seismic modeling using a linearized rai-born algorithm was performed on this first static model, taking into account initial water-oil contact position and fluid saturation. Dynamic modeling of water injection and oil production was then carried out on the fine-grid model at the field scale. Finally, time lapse seismic modeling was achieved on the same model, after the updating of saturation and pressure.

The 4D synthetic model will be used as a virtual reservoir, by extracting well and seismic data and applying various methods such as well test simulation, pre-stack stratigraphic inversion, lithoseismic interpretation, geostatistical reservoir modeling, up-scaling or history matching. The qualitative and quantitative comparison of the outputs with the 4D reference model will provide a unique opportunity to benchmark and optimize these advanced reservoir characterization techniques.

Advances in Reservoir Modeling
2005 AAPG International Conference and Exhibition (September 11-14, 2005) Technical Program