Preliminary communication
Tectonic style and hydrocarbon evaluation of duplex Kruja zone in Albania
Telo Velaj
; 1575 W. Street Road # 336, Warminster. PA 18974.USA
Abstract
Albania belongs to the Dinaric-Albanid-Hellenides arch of alpine orogeny. There are four main geological units (Fig. 2): autochthonous foreland, foredeep basin, inner and external Albanides. The Kruja zone is included in the External Albanides.
The Kruja thrustbelt consists of a succession of tectonic duplexes. From tectonic point of view this zone represents orogen, but with shallow water carbonates facies. It is represented by some anticlinal structural lines which are tectonically faulted in their western flank. Western edge of this zone is complex due to regional overthrust faults, which have caused their overthrusting above the South Adriatic basin with amplitude of about 70-100 km. A folded zone with high perspective plays must have developed, which is an analogue scenario as the Apennines overthrust in Italy. The stratigraphic section of the Kruja zone comprises: Upper Cretaceous to Paleocene-Eocene platform carbonate sequences; the Oligocene-Aquitaine deposits are represented by flysch-flyschoidal sandstone-clays-silts with underwater slumping horizons and organogenic-clastic limestones; nonconformity Tortonian -Pliocene molasses deposits.
From petroleum point of view, numerous surface oil seeps occurred there along the Neogene nonconformity in Tirana piggyback basin. The seeps confirm the existence of a currently active petroleum system in this area, but no commercial hydrocarbon accumulation has yet been found. Many exploration wells with target being carbonate structures and Neogenic sandstones have been drilled in this zone. ln the Kruja zone, the source rocks horizons were proved to be related to Upper Cretaceous deposits. Oil and gas accumulations in Albania occur both in carbonate (Cr2 –Pg2) and clastic reservoirs (N13t – N2P).
Keywords
Albanides; Kruja zone; Tirana piggyback basin
Hrčak ID:
86219
URI
Publication date:
31.8.2012.
Visits: 3.082 *