Exploration Well Teboursouk 1 (“TEB1”): The drill stem test (“DST”) carried out on three fractured zones inside the Carbonate Complex Formation between 976m and 1,002m depth confirmed the presence of a high fracture porosity system but produced “formation water with a salinity of about 100g/L”. The fair to good cut fluorescence recorded while drilling is associated with residual oil only.
The preliminary re-interpretation of seismic data based on TEB1 results indicates that there is potential to have updips of the structural trap for both the shallower Carbonate and the deeper sandstone oil targets. From the new data it may now be deduced that the TEB1 well location was not optimal.
The well has therefore been suspended whilst detailed analysis is undertaken of the data to incorporate the results of the well in the geological model.
Based on the results of the current analysis, the joint venture will next acquire infill 2D seismic crossing the well location so that we are able to target updip areas of the prospect via a sidetrack from the existing well.
TEB1 well was the first deep exploratory well drilled in the Tunisia belt and in the southern part of the Medjerda Permit. This exploration well was designed to evaluate a new oil and gas play concept for the area where several Cretaceous proven source rocks are expected to participate in feeding the structures with hydrocarbons. TEB1 encountered the expected sequence and successfully identified the presence of an active petroleum system with good reservoir sources and seals.