Seismic reflection studies in Polatlı region, Turkey

Yıl 1985, Cilt: 103-104 Sayı: 103-104, 45 - 55, 01.08.1985

M. İşık Turgay Cengiz Kurtuluş

Öz

Seismic reflection work was carried out in the southwest of Ankara around Polatlı-Haymana region
as part of "Haymana Oil Exploration Project" The project area is located in Polatlı Basin extending in NW-SE direction
and covering Triassic to Quaternary sediments. Seismic reflection data were recorded along profiles of 426 kilometers
located in the area by Ünalan's work (Ünalan et al., 1979) in which the stratigraphy of the Upper Cretaceous-Lower
Tertiary are described in detail. The upper boundary of Beyobası formation is the best reflector level in the data. This
Maestrichtian Formation has been considered as the reservoir formation because of its fossileferous sandstone and limestone
content. The contour map of the Beyobası formation was prepared and interpreted. The transition bands in the
stratigraphic layers are generally not identified sufficiently. As the result of interpretation a NW-SE directional fault
zone and two highs at both sides of this zone in the east part of the project area were obtained. The highs in the
north and south of this zone are considered as parts of Kızılcakışla and Eski Polatlı anticlines. However, the north closing
of the high located in the north and the south closing of the high located in the south could not be seen in the
seismic data. In the west part of the project area two synclines were observed. The closing of one which is placed in
the south is observable and the closing of the other one located in the north is not clearly observable.

Anahtar Kelimeler

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Kaynakça

• Arıkan, Y., 1975, The geology and Petroleum prospects of the Tuz Gölü basin: MTA Bull., 85,17-35, Ankara-Turkey.
• Eres, K., 1978, Polatlı-I Kuyusunda hız tayini ile ilgili kuyu atışı raporu: MTA Rep. (unpublished), Ankara-Turkey.
• Özbudak, N., ve Yılmaz, H., 1980, Kuyu bitirme raporu: MTA Rep. (unpublished), Ankara-Turkey.
• Ünalan, G.; Yüksel, V.; Tekeli, T.; Gönenç ,O.; Seyirt. O. and Hüseyin, S., 1976, Haymana-Polatlı yöresinin (Güneybatı Ankara) Üst Kretase-Alt Tersiyer stratigrafisi ve paleocoğrafik evrimi: Türkiye Jeol. Kur. Bull., 19, 159-176, Ankara-Turkey.