tailieunhanh - Geology and hydrocarbon systems in the Western Black Sea

This paper presents the author’s integrated regional studies during the last decade. The main purpose is to present an overall understanding of the geological structure, sedimentary basins and hydrocarbon systems of the whole Western Black Sea Zone (WBSZ). Th is study is based on original data from boreholes, seismic and gravity-magnetic surveys and hydrocarbon accumulations. | Turkish Journal of Earth Sciences Turkish J. Earth Sci. Vol. 21 2012 pp. 723-754. Copyright TUBlTAK doi yer-1102-4 First published online 28 December 2011 TUBiTAK Geology and Hydrocarbon Systems in the Western Black Sea GEORGI GEORGIEV Sofia University St. Kl. Ohridski Department of Geology Palaeontology Fossil Fuels 15 Tzar Osvoboditel Blvd. 1504 Sofia Bulgaria E-mail gigeor@ Received 07 February 2011 revised typescript received 16 November 2011 accepted 27 December 2011 Abstract This paper presents the author s integrated regional studies during the last decade. The main purpose is to present an overall understanding of the geological structure sedimentary basins and hydrocarbon systems of the whole Western Black Sea Zone WBSZ . This study is based on original data from boreholes seismic and gravity-magnetic surveys and hydrocarbon accumulations. Many geophysical borehole data obtained for WBSZ during the last 3-4 decades were interpreted mostly at a national level using different approaches terminology and nomenclature for the same or similar lithostratigraphic and tectonic units. Therefore a unified approach to interpretation of borehole-seismic data and correlation of stratigraphic sedimentological and tectonic units has a key importance for overall clarification of the deep geological structure and the hydrocarbon challenges. A set of regional geological cross-sections along good quality basic seismic lines and basic boreholes was constructed. A detailed tectonic map of the WBSZ has been compiled by integrated interpretation of seismic borehole and gravity-magnetic data. The definition of hydrocarbon systems and promising exploration trends is made by source rock assessment Oil-Oil and Oil-Source rock correlations analyses of the reservoir seal pairs and the hydrocarbon migration and accumulation. Genetic correlations are based on many Rock-Eval Gas Chromatography Mass Spectrometry GC-MS and carbon isotope analyses. The complex geological .