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Abstract

Chapter from:
AAPG Memoir 68:Regional and Petroleum Geology of the Black Sea and Surrounding Region, Edited by A.G. Robinson
AAPG Memoir 68: Regional and Petroleum Geology of the Black Sea and Surrounding Region. Chapter 19: Stratigraphic and Structural Development of the Gulf of Odessa, Ukrainian Black Sea: Implications for Petroleum Exploration, by Andrew G. Robinson and Edward Kerusov, Pages 369-380

Copyright © 1997 by The American Association of Petroleum Geologists. All rights reserved.

Chapter 19
Stratigraphic and Structural Development of the Gulf of Odessa, Ukrainian Black Sea: Implications for Petroleum Exploration

Andrew G. Robinson
JKX Oil & Gasplc
Guildford, Surrey, United Kingdom

Edward Kerusov
Chernomorneftegas
Simferopol, Ukraine

ABSTRACT

The Gulf of Odessa forms the northern rift and passive margin of the extensional Western Black Sea. The prerift comprises the Scythian Proterozoic to Triassic platform in the north (which dips gently southward) and, in the south, a Triassic-Early Jurassic back-arc basin that closed during the Middle Jurassic (Tavric-Kure Series). Both of these units were covered by a Late Jurassic carbonate platform prior to the Aptian-Albian doming and rifting that preceded the opening of the Western Black Sea (Cenomanian). During the late Eocene to Oligocene, Aptian-Albian half-grabens suffered limited inversion related to closure of the Tethyan Ocean in Previous HitCentralTop Anatolia. The main play in the Gulf of Odessa has involved Lower Paleocene chalk in inversion-related anticlines formed during the late Eocene to Oligocene. The chalks are not significantly fractured, and permeabilities are of the order of a few millidarcys. The source rock for the wet gas has not been positively identified, but may be Paleozoic, possibly Devonian, or Albian in age. Extensional structures that formed prior to inversion may still contain the early oil charge from such a source. Adjacent to the deep Black Sea Basin, there is an east-west-trending extensional high (Kalamit Ridge) that extends into Romania and includes the Lebada oil field. The Lebada play, transgressional Albian sandstones draped over partly inverted extensional fault blocks and charged by a Tertiary (Upper Eocene?) source rock in the deep Black Sea Basin, extends into Ukrainian waters.

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