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EVALUATION AND PERFORMANCE OF NATURAL GAS STORAGE IN DEPLETED GAS RESERVOIRS

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Author(s): Anthony Okwananke | B. Yekeen Adeboye | Lawal A. Sulaimon

Journal: Petroleum and Coal
ISSN 1337-7027

Volume: 53;
Issue: 4;
Start page: 324;
Date: 2011;
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Keywords: Underground gas storage | evaluation | performance | pressure-content | inventory.

ABSTRACT
Natural gas can readily be stored in depleted gas reservoirs, but when under storage in the storage horizon, this gas may experience some anomalies that may affect its inventory and performance. Evaluation and performance of the natural gas stored was determined by inventory analysis and by primary depletion performance. This made use pressure-content plots of P/Z versus inventory to determine gas migration into or away from the storage reservoir and its magnitude. The optimal performance of the stored gas was carried out by comparing the various stored volumes, the amount of non effective gas present and how much of it could be recovered. This was done for the storage reservoir when it was not subject to gas gain or loss, when it was subject to gas loss and when it was subject to gas gain. It was shown that gas storage in depleted gas storage reservoir subjected to gas gain is the best form of underground natural gas storage.
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