Abstract
Abstract - Depleted gas reservoir has been already explored and its geologic data, along with its reservoir properties, are already known through seismic exploration and drilling. Therefore it would be less difficult to develope a gas storage from depleted gas reservoir. Cushion gas which remains in the reservoir to maintain pressure affects withdrawal rate of working gas in underground gas storage. In this study, we attempted to in-vestigate the relationship between cushion gas and withdrawal rate using a commercial simulator. From the analyses of the results, it is found that the minimum limit for a cycle of 5-month injection and 5-month with-drawal is 10 wells with 50% cushion gas, and 12 wells with 60% cushion gas for a cycle of 7-month injection and 3-month withdrawal.Key words : gas storage, depleted gas reservoir, cushion gas, working gas, simulation 1) † Corresponding author:wmsung@hanyang.ac.kr Copyright ⓒ 2013 by The Korean Institute of Gas KIGAS Vol. 17, No. 2, pp 9~20, 2013 http://dx.doi.org/10.7842/kigas.2013.17.2.9(Journal of the Korean Institute of Gas)
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