Hydrocarbon Geology of the Romanian Carpathians, Their Foreland, and the Transylvanian Basin
Mihai Stefanescu, Oprea Dicea, Alexandru Butac, Daniel Ciulavu, 2006. "Hydrocarbon Geology of the Romanian Carpathians, Their Foreland, and the Transylvanian Basin", The Carpathians and Their Foreland: Geology and Hydrocarbon Resources, Jan Golonka, Frank J. Picha
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The Romanian territory had a very complex geological evolution. This evolution generated a diversified geology with extended platforms limiting, to the east and south, a folded chain where spectacular overthrusts are present. More than this, posttectonic covers (basins) common to different tectonic units are also present. Some sequences of these posttectonic covers are extended from the frontal part of the folded chain over the platforms. Most of the tectonic units, as well as the post-tectonic covers, host hydrocarbon fields. On some of the tectonic units, the oil generation is proved only by the seep presence.
The aim of this chapter is to briefly present the geology of the Romanian onshore, except its western part, namely, the Apuseni Mountains and the Pannonian basin.
Each platform (East European, Scythian, and Moesian), each the folded chains (North Dobrudjea Orogen and groups of nappes from the East and South Carpathians [Transylvanides, Median Dacides, Outer Dacides, Marginal Dacides, Moldavides]), as well as the posttectonic basins (Transylvanian Basin, Getic Depression, Focsani Depression), have been described. For all the above-mentioned units, the standard lithostratigraphy and their internal structure are discussed. More details are given for those units that proved to be important hydrocarbon producers, namely, the Moesian Platform, Getic Depression, Subcarpathian nappe, Tarcau nappe, Diapiric fold zone, and Transylvanian Basin. The petroleum systems (including source rocks, reservoirs, and traps) of most of the units are also analyzed. From almost 1000 oil and gas fields already discovered, a reduced number of fields are quoted, just in order to give an idea on the diversity of traps.
Copyright ©2006. The American Association of Petroleum Geologists.
The history of the geologic evolution of the Romanian onshore related to hydrocarbon genesis and accumulation conclude the chapter.
Finally, it is to remark that, in spite of its character of synthesis, the chapter could be a useful tool for those scientists who are interested in an overview of Romanian geology and the related hydrocarbon fields.
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The Carpathians and Their Foreland: Geology and Hydrocarbon Resources
This volume of 30 chapters authored by 107 geologists and geophysicists from Austria, Czech Republic, Hungary, Poland, Romania, Slovakia, Ukraine, United Kingdom, and the USA provides a comprehensive and understandable account of geology and hydrocarbon resources of the entire Carpathian system from northeastern Austria to southern Romania, including the Neogene foredeep, the foreland platform both in front and beneath the thrust belt, the Carpathian thrust belt, and the late and post orogenic intermontane basins. Principal chapters on regional geology are supplemented by thematic contributions on geodynamic reconstructions, regional geophysical investigations, hydrocarbon systems, and case studies of major oil and gas fields. To date, close to 7 billion barrels of oil and more than 53 trillion cubic feet of natural gas have been produced from the entire Carpathian system. Additional new reserves may be found, especially at deeper structural levels below the Neogene foredeep and the thin-skinned Carpathian thrust belt. Seventeen chapters of Memoir 84 have been printed in full. The remaining chapters have been printed as abstracts only, with the full paper for all 30 chapters as .pdf files on the CD-ROM in the back of this publication. The publication is intended as a source of information to schools, governmental and private institutions, oil companies, and potential investors.