The Model of the Oil-Gas Bearing Molasse Reservoirs in the Peri-Adriatic Depression, Albania

Kapedani Nazif Hysen and Toto Gezim Skender

The Peri-Adriatic Depression (PAD) represents the eastern extension of the Cenozoic Adriatic basin into onshore Albania. Several oil, gas Condensate, dry gas fields have been discovered in this basin.

Dry gas fields occur mainly in the western sector of the basin, whereas the oil fields are found in the eastern one.

Reservoir rocks are well sorted to poorly, fine grained to pebbly sandstones and silstones of Miocene (Serravalian) to Pliocene age, deposited in deep water (turbidite), deltaic and littoral environments.

Reservoir beds range in thickness from 1 to 40 m and are generally regionally distributed.

The porosity varies from 3 to 37%, the permeability ranges from low values up to 2200-2500 mD. The minimal value of the porosity measured from oil flowing reservoirs varies from 12% to 16% and for the dry gas 12-21%.

Geothermal gradient ranges from 1.4-2 C/100m.

The dimensions of the reservoirs are very different and its geometric shape differs from beds to irregular shape.

The types of the traps are also different : lithologo-stratigraphic, lithologic, structural-lithologic ones, etc.

The upper part of the Pliocene basin belongs to the delta deposits. The deltaic sandstones are coarse grain to conglomeratic ones, of barriers type, saturated with fresh water and have vast distribution.

AAPG Search and Discover Article #91019©1996 AAPG Convention and Exhibition 19-22 May 1996, San Diego, California