In recent years, a tremendous amount of work by oil companies has been done to evaluate tertiary flood programs in heavy oil reservoirs. One of the keys to understanding how a flood will behave, and therefore an input to the modeling, is a basic knowledge of the depositional environment and reservoir geometry. This often requires the analysis of a large amount of information. The core analysis alone on a multiple well project can be extremely time consuming if it is to be done with any significant detail.

This paper outlines the basis for a technique which allows a fairly detailed analysis of the reservoir potential and depositional environment. Using field generated Cyberlook logs and the dipmeter programs of Cluster and Geodip, a fairly rapid interpretation can be made which will confirm the depositional environment, the reservoir potential, and the orientation of any permeability barriers within the reservoir.

Several examples are presented where the Electromagnetic Propagation log is used in the Cyberlook to identify the mobile oil potential of the reservoir. This computation is then compared to Cluster and Geodip plots and, where anomalies occur, either changes in Rw or oil viscosity are implied. Reservoir geometry is then estimated from knowledge of the depositional environment and the dipmeter computations.

With these tools at hand, it is now possible to predict not only which hydrocarbons will move, but the general direction of movement during initial production or flooding of the reservoir.

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