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The AAPG/Datapages Combined Publications Database
AAPG Special Volumes
Abstract
Chapter from:Black
Sea and
Surrounding Region
Black
Sea and
Surrounding Region. Chapter 16: Results of Geochemical Analysis of Seeps and Potential Source Rocks from Northern Turkey
and the Turkish
Black
Sea
Chapter 16
Results of Geochemical Analysis of Seeps and Potential Source Rocks from Northern Turkey and the Turkish
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Y. Haluk Iztan
Turkish Petroleum Corp.
Ankara, Turkey
ABSTRACT
Black
Sea,
several source rock units, mainly from outcrops but also from wells, have been tested for
source rock potential. Organic geochemical studies on subsurface and surface samples
indicate that there are several potential hydrocarbon source rock units in the region: the
Kartal Formation (Early Devonian), Yilanli Formation (Middle Devonian-Early
Carboniferous), Alacaagzi and Zonguldak Formations (Carboniferous), Himmetpasa
Formation (Middle Jurassic), Caglayan and Ulus Formations (Cretaceous), Yemislicay
Formation (Late Cretaceous) and Kusuri Formation (Eocene). The Zonguldak and Himmetpasa
formations are composed of predominantly gas-prone vitrinite macerals. The coal samples
from the Alacaagzi Formation have a different maceral composition consisting predominantly
of sporinite, which is capable of producing
oil
. Four surface
oil
seeps, one seep from
offshore of Rize, one
oil
show from Igneada-1 well, one gas seep from the Ulus Basin, and
one gas sample from the Akcakoca-1 well, have been analyzed using classical organic
geochemical techniques (pyrolysis, gas chromatography, and gas chromatography-mass
spectrometry). An attempt has been made to correlate possible source rock in the area with
the Armutcuk
oil
seep. Results of geochemical analysis of the
oil
seeps from different
localities in the
Black
Sea region indicate that they have been derived from different
units.
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