Page 1 ASX Release 16 September 2011 ADX: Sidi Dhaher-1 Well - Operations Update # 4 Activities since spud at 6:00 pm GMT, Friday August 26 2011 ADX is pleased to report that following the successful completion of running and cementing 13 3 / 8 "Casing at the well approximately 1000m is being drilled in a 12 1 / 4 "Hole. Rig operations are currently drilling ahead at a depth of approximately 1.700 meters. To date the well has encountered two potential reservoir zones in the Tertiary and Cretaceous respectively. Fortunately both targets have been encountered higher than originally prognosed. As a result of the 13 3 / 8 "Casing being set deeper to shallower isolates sandstones and a fault intersection, it is now possible to safely drill the to a deeper well next casing point at 2000m. At that depth the potential reservoir zones encountered so far will be evaluated by wireline logging prior to setting 9 5 / 8 "Casing. Weekly forecast operations: • Drill ahead to next casing point (9 5 / 8 "Casing) at about 2000m • Run wireline logging operations - Which amongst other things wants DetermineApplicationTrust hydrocarbon potential |