The aim of this study is to investigate the feasibility of underground gas storage in UM ERadhuma formation/Ratawie oil field.This formation is high permeability bed according to the available coring data,dolomite,and water bearing and located below RUS formation which consists of impermeable anhydrite beds.Interactive petrophysics(IP),Petrel RE and Eclipse 100 softwares are used for well log interpretation,conducting a reservoir simulation model and predicting the reservoir behaviour during storage respectively.A black oil,three dimensional and two phase fluid model has been used.The results showed that upper reservoir of UM ERadhuma formation is good for underground gas storage because of the tightness,of its cap rock and its properties for storing gas.It has been found that the available volume for storage is 14.3 billion cubic feet with a structural closure of 45 m.moreover,two groups of suggested injection wells location are used during this study to investigate the effect of wells location on the injection behaviour and it has been found that high space wells location is more suitable for the gas injection.
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