This paper presents a history match and prediction for the Wizard Lake D-3A pool reservoir in Alberta, Canada. The reservoir is a dolomitized bioherm reef with an initial oil pay zone of 648 feet (197.5 m) and it is underlain by the Cooking Lake aquifer. A fieldwide 3-D (11×14×53), 4-component (gas, solvent, oil, water) simulation model is used to history match the reservoir pressure, the oil, gas, and water productions, the gas/solvent, solvent/oil, and oil/water contact locations. This paper will address several features of the model which were developed specifically for this study. These include treatment of openhole completion and handling of solvent and water coning with the coarse grid model. It will also discuss different methods of calculating the fluid contact locations from simulation results.

The history match covers a time span of 3 6 years (1951–1986). The reservoir was initially under primary production for 19 years during which reservoir pressure dropped below the bubblepoint pressure and a secondary gas cap formed. Hydrocarbon solvent flooding started in late 1969 and continues to the present time. During the solvent flood, both residue gas and water were injected to raise the reservoir pressure back to its original value. At the completion of the history match, the model was used to make prediction runs to assist in planning the pool’s production and injection strategy.

You can access this article if you purchase or spend a download.