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   Open Blocks: LA GALITE


GEOGRAPHICAL SETTING

Northern offshore Tunisia.

ACREAGE

7910 km2.

PREVIOUS EXPLORATION

In La Galite Block, several seismic surveys have been recorded, with a total of 760 km. But, no wells have been drilled. However, one well has been drilled in the vicinity of the block.

GEOLOGICAL SETTING

The block is located within the offshore continuation of the North African overthrust belt(Maghrebides). It corresponds to a gently sloping continental shelf, including La Galite archipe­lageo which is formed of Oligo - Miocene flysch associated with Miocene igneous rocks. The shelf geology seems to resemble the onshore Tellian Altas ; the immediatly subsea terranes would corres­

pond to the Numidian flysch nappe,trending northeast - southwest and affected by numerous thrusts.

HYDROCARBON POTENTIAL

Data on reservoirs and source rocks are missing within the block. However, the Cretaceous and Lower Eocene organic-rich facies, identified in the nearby onshore acreage, are expected to be also potential source rocks in La Galite Block. Potential reservoirs would include Oligo-Miocene clastic turbidites within the Numidian flysch and Eocene and Upper Cretaceous fractured carbonates. Traps would be mainly structural, with thrust - related types.

SEISMIC

DATE
SURVEY
OPERATOR
SOURCE
NB OF KM
FIELD CONTRACTOR
1971

ALPHANUM

BUTTES
Airgun
100
PETTY RAY
1984
GST 84

GECO

Airgun
160
GECO
1985
TUT 85 
AMOCO
Airgun 500
CGG