Abstract

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The investigated well data sets have revealed that the Lower Acacus Formation in Ghadames Basin can be defined by two deltaic complexes correspond to two distinct prograded clastic wedges, that appear to exhibit significant differences in net sandstone thickness, lateral extension and lithofacies development. The play fairway of the Lower Acacus sandstones is considered to be wide enough and corresponding to a sequence of inter bedded fluvial-deltaic sandstones, marine sandstones and shale. To date, drilling activities targeting these reservoir sandstones have been concentrated in the central and northern part of the fairway. Production from these sandstones has been impressive. Average daily flow rate have increased from less than 300 BOPD and 0.1 MMCFGPD to more than 1000 BOPD and 5 MMCFGPD. Analyses of well test performance on the level of Lower Acacus sandstone reservoirs suggest an ultimate oil reserves for the entire fairway in the Ghadames Basin.