FINE GRID INITIAL WOC INITIAL GOC Red: Increased water Blue: Increased gas GOC-I WOC-I UPSCALED FROM ORIGINAL DATA UPSCALED FROM AVERAGED DATA AANONSEN ET AL. FINE GRID INITIAL GOC INITIAL WOC MOVING AVERAGE, 20x20x1 GOC-I WOC-I ORIGINAL DATA. Horizontal cell size: Seismic grid: 25 x 37.5 m Simulation grid:đ00 x 200 m in oil zone up to 1600 x 200 m in aquifer and gas cap Vertical cell size (layer thickness) Seismic grid: ~ 10 m (4 layers) Simulation grid:Đ.20 m – 26 m (7 layers)
#4d hampson russell ppt simulator
Q – model parameters to be determined p(q) – simulated production data s(q) – simulated seismic data: Simulator + rock mechanics model dp – production data ds – seismic data: Poisson’s ratio, r, and Acoustic Impedance, Zp CP and CS – covariance matrices (weight matrices) How should we map the seismic data from seismic grid to simulation grid? How should we determine the coefficients of this objective function, i.e., uncertainty in the seismic data? The dimension of Cs may be large Is it sufficient to use diagonal matrices? ) SEISMIC INVERSION SEISMIC PROCESSING INVERSE MODELLING MISMATCH Real seismograms Processed seismic data RESERVOIR SIMULATOR Pressures, saturations FORWARD MODELLING SEISMIC MODELLING Simulated Seismic data ? Petrophysical properties (porosity, permeability) To be determined:ĥ Objective function in 4D history matching Petrophysical properties (porosity, permeability) Dynamic reservoir properties (pressures, saturations, fluid contacts) ROCK PHYSICS Elastic properties (Vp, Vs, Impedance.
) ROCK PHYSICS RESERVOIR SIMULATOR Pressures, saturations MISMATCH Dynamic reservoir properties (pressures, saturations, fluid contacts) Petrophysical properties (porosity, permeability) Petrophysical properties (porosity, permeability) To be determined:Ĥ The HUTS project (History-Matching Using Time-lapse Seismic) ) SEISMIC INVERSION MISMATCH Elastic properties (Vp, Vs, Impedance. INVERSE MODELLING FORWARD MODELLING Real seismograms SEISMIC MODELLING Simulated Seismic data MISMATCH ? SEISMIC PROCESSING Processed seismic data ROCK PHYSICS Elastic properties (Vp, Vs, Impedance.
OUTLINE Introduction History-matching with 4D seismic data Mapping 4D data to Simulation grid Upscaling Downscaling Uncertainty / data covariance Some conclusions and challengesģ Conditioning reservoir simulation models to 4D data Aanonsen Centre for Integrated Petroleum Research, University of Bergen, Norway Acknowledgments to Presentation on theme: "Upscaling of 4D Seismic Data"- Presentation transcript:
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