مرکز منطقه ای اطلاع رساني علوم و فناوري - Investigation of Hydrocarbon Possibilities of the Tertiary Rock Units in South of Isparta (SW‐Turkey)

Abstract :

Investigation area is located between Kışla and Yazır villages in South of Isparta(SW‐Turkey). In this area is outcropped autocthonous and allochthonous rock units. Themain autochthonous units in this area are Beydağ limestone (Jurassic‐Cretaceous),Aquitanian Yazır limestone and Burdigalian Ağlasun Formation. The Pliocene‐Quaternaryunits overlie unconformably on these autochthonous units. The allochthonous units ininvestigation area are Isparta Çay Formation belongs to Antalya nappes and relatedophiolitic rocks and Eocene Kayıköy Formation which overthrusted on the AğlasunFormation.The distribution and stratigraphic relationships of the rock units in study areawere investigated and to showed the underground geological structure on the coss‐section ofthe study area.The Yazır and Ağlasun Formations are widespread in the study area and richcontain in organic matter. For this reason, these units formed the most important sourcerocks units in the study region. On the other hand, reefal Yazır limestone is the mostimportant reservoir rock unit due to its abundant porosity structure.According topetrographic studies the Yazır limestone samples described manily as boundstones andpackstones. In addition, the Beydağları limestone samples are classified as vackestone andmudstone. The sandstone samples of the Ağlasun Formation composed mainly of feldspathiclitharenite and litharenite.The average porosity of the Yazır reservoir limestone unit variesbetween 10 % and 16.4 % respectively. The secondary porosities (such as fracture andvuggy porosities) are also common in texture of the Yazır limestone unit.