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Sud Nefta Permit, Tunisia: Hydrocarbon Prospectivity

Client:

Independent oil company

Location:

Sud Nefta permit, south central border of Tunisia with Algeria

Terrain and Climate:

A flat desertic peneplane to the south of Chott Jerid.

Area - km²:

2,824 km 2

Objectives:

To evaluate the hydrocarbon prospectivity of the block by integration and analysis of several data sets on a regional scale, interpolating the results into the permit and assessing the seismic survey in view of type of structures expected; these are normal faults and related horst and graben.

Geology and Prospectivity:

The geology of the permit is characterised by a Mesozoic-Palaeozoic Basin with over 5,000m of sediments, containing favourable reservoirs of Cambrian, Ordovician and Lower Triassic clastics, covered by thick impervious shales and evaporites. The main mature source rock is represented by thick black shale of Silurian age, which have expelled hundreds of billion barrels of oil, later accumulated in over 100 fields in Algeria, Libya and Tunisia, among which such giants as Hassi R. Mel, Hassi Messaoud (Algeria) and El Borma (Tunisia) are found .

Data available for integration:

Regional Landsat MSS structural interpretation, regional aeromagnetics, regional Bouguer gravity, seismic data covering the entire surface of the permit with a 4 to 6km grid and well data from adjacent concessions.

Methods and Products:

N/A

Benefits and Results:

The results were compiled into a farm-out brochure and were the basis for planning a further programme of seismic acquisition.

In summary, all favourable parameters for oil and gas generation, migration and entrapment seem to be present in the Sud Nefta anomaly A. By comparison and extrapolations from Palaeozoic fields of Algeria and Tunisia, anomaly A is capable of containing recoverable reserves of 9 TCFG and 300 MM Bbls of liquids.

Innovation:

N/A

Cost:

N/A

Future Developments:

N/A