Abstract:

Knowledge of reservoir thickness is crucial in the determination of the hydrocarbon volumes in a reservoir. An incorrect estimation of reservoir thickness, therefore, would lead to an incorrect reserves estimation. During traditional pressure transients analysis, reservoir thickness is often assumed constant to enable the determination of reservoir permeability. Permeability estimates from pressure transient analysis have been used as decision anchors for performance of reservoir stimulations. In this sense, by the assumption of constant-reservoir thickness, decisions made on such permeability calculations are based on misleading data.

Here, we investigate the utility of temperature as a matching parameter to determine reservoir thickness.

We used the Levenberg-Marquardt algorithm to determine the reservoir thickness which would minimize the difference between reservoir temperature and model temperature. Eclipse 300 was used to generate temperature profiles. Using temperature data, reservoir thickness could be determined in a partially penetrated reservoir. In other reservoir shapes, information on the nonuniformity of the reservoir could be extracted from the mismatch of the reservoir temperature data with a temperature profile using a model assumed to have constant reservoir thickness.

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Copyright 2014, Ha-andza Mabunda: Please note that the reports and theses are copyright to their original authors. Authors have given written permission for their work to be made available here. Readers who download reports from this site should honor the copyright of the original authors and may not copy or distribute the work further without the permission of the author, Ha-andza Mabunda.