--> Abstract: The Guebiba Field - Reservoir Characterization and Modeling, by Rudolf Finsterwalder and Lamia Rouis; #90072 (2007)

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The Guebiba Field - Reservoir Characterization and Modeling

Rudolf Finsterwalder1 and Lamia Rouis2
1OMV, Tunis, Tunisia
2ETAP, Tunis, Tunisia

The Guebiba Field is located 18km south-west of Sfax city in Tunisia. The oil field was discovered by well Guebiba-1 in 1981. The target was a structural high at Late Cretaceous level. Two reservoirs, the Douleb Mbr. and the Bireno Fm. were encountered. Ten wells were drilled and some 5.8mn bbl oil have been produced to date.
A recently acquired 3D seismic survey defined the structural extension of the field and located the mainly NW-SE extending normal faults. The shallower reservoir, the Turonian/Coniacian Douleb Mbr. is part of the basal Aleg Fm. and consists of limestone; pay thickness reaches 9m. The deeper, more complex reservoir, the Turonian Bireno Fm. consists of limestones, dolomites, shales and anhydrite layers; pay thickness can be in excess of 40m.
The results of previous studies – ranging from seismic to regional geology, sedimentology, log evaluation and core analysis were integrated in a 3D geologic model, comprising various parameter models. Simulation work helped to iteratively enhance details.
A recent drilling campaign with three more wells was planned based on the results of the 3D model. Newly acquired data led to an in-depth review of geological and seismic data and finally to the generation of a completely new and integrated model. An aim of this work is to improve the recovery efficiency of the Guebiba Field.

 

AAPG Search and Discovery Article #90072 © 2007 AAPG and AAPG European Region Conference, Athens, Greece