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In this study, a mathematical model was developed to present pulse and interference testing for multilayered reservoirs. It was found that apparent storage calculated from pulse testing data is always less than or equal to the actual storage of the reservoir and that apparent transmissibility is always greater than or equal to the actual transmissibility. For short cycle intervals, the fractional production rate from a particular layer is not proportional to its transmissibility fraction. The effect of storage variation on fractional production rate is negligible. Wellbore damage affects both apparent transmissibility and storage. Less accurate estimation reservoir characteristics is obtained using pulse-test data as the contrast in reservoir properties increases and vice versa. A new approach is suggested to use data of single well test as well pulse test to estimate properties of individual layers. The approach is demonstrated by a three-layer numerical example.

A New Technique To Predict Multilayered Reservoir Characteristics Using Pulse Testing Data