Reservoir Model for the Alameda Central Waterflood
- T.E. Randall (The British American Oil Company)
- Document ID
- Petroleum Society of Canada
- Journal of Canadian Petroleum Technology
- Publication Date
- April 1968
- Document Type
- Journal Paper
- 78 - 84
- 1968. Petroleum Society of Canada
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- 75 since 2007
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The methods used in developing the mathematical model have been referred to in the literature as being "probabilistic" rather than of the "deterministic" or "black box" types. The basic approach used in developing the model to characterize the Alameda Central Unit Waterflood assumes continuity of the reservoir mechanics with time. The past performance was analyzed to describe the reservoir, and future performance was assumed to follow the established patterns. To develop a mathematical picture of the Alameda Central Unit reservoir, a two-dimensional single-phase steady state model was used in conjunction with material balance calculations, real-time conversion methods and oil-water interface advance calculations.
The model was developed to optimize water injection allocation, determine the configuration of the frontal advance and evaluate the success of the waterflood. The model also provides a basis for continuing review and revision of the basic concepts of reservoir operation.
The results of the reservoir study have confirmed the apparent lack of permeability orientation in the pool and indicate that the waterflood is progressing better than originally anticipated. Based on the results, recommendation was made to the working interest owners that the assumed water saturation value be reduced to 35 per cent and the recovery factor be increased to 35 per cent with a corresponding increase in accepted ultimate recoverable oil from the Unit area.
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