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1 Paradigm Company, 78 Avenue du XXeme Corps, 54000, Nancy, France
2 Sarawak Shell Berhad, Locked Bag No. 1, 98009 Lutong, Sarawak, Malaysia; Marcel.Elie{at}Shell.com
3 G2R, Université de Nancy, Centre National de la Recherche Scientifique (CNRS), Centre de Recherche sur la Géologie de l'Uranium (CREGU), 54506 Vandoeuvre-lés-Nancy, Cedex, France
4 University of Leoben, Peter-Tunner-Straße 5, A-8700 Leoben, Austria
5 Department of Geology, Donetsk National Technical University, Artem Str., 58, Donetsk 83000, Ukraine
Dani Alsaab received his B.Sc. degree in geology from the University of Aleppo Syria in 1999. After a short-term contract with Elf Hydrocarbures Syrie as a mudlogger, he joined the High National School of the Mines of Paris and the Institute Française de Pétrole to complete his M.Sc. degree. He then completed his Ph.D. in modeling of petroleum systems in 2007 from the University of Nancy. Recently, he joined the Paradigm Company as a geologist on the petroleum reservoir quality and assurance team.
Marcel Elie received his Ph.D. in organic geochemistry from the University of Nancy in 1994. His research interests are in organic geochemistry and petroleum systems. Recently, he joined Shell Malaysia Exploration and Production where he works on reservoir geochemistry.
Alain Izart is an assistant professor at Nancy University. He received his Ph.D. in 1976 and his Habilitation in 1990. His research concerns the sedimentology, sequence stratigraphy, and molecular geochemistry of coals of the Carboniferous basins in France, Asturias, Morocco, Donets, Russia, and Kazakhstan, and the modeling of subsidences, paleotemperatures, and organic matter maturity.
Reinhard F. Sachsenhofer is a professor in the Department of Applied Geosciences and Geophysics at the University of Leoben. His main research interests are in basin analysis, hydrocarbon systems, source rocks, coal, and organic petrology.
Vitaliy A. Privalov is a professor in the Department of Geology, Donetsk National Technical University, Ukraine. He is an engineer in applied geology and mining (1983) and received his Ph.D. in 1986 and Doctor of Science in 2005. His research concerns the tectonics and the prediction of outbursts and methane entrapments in the Donets Basin.
ABSTRACT
The numerical modeling of the Ukrainian part of the Donbas fold belt indicates that the coalification pattern was controlled mainly by the maximum burial depth of coal seams and the heat flow (HF) (40–75 mW/m2) during the Permian. The coalification pattern was overprinted by magmatic events during the Late Permian in the south syncline (150 mW/m2) and during the Permian–Triassic in the north of the Krasnoarmeisk region (120 mW/m2). The coalification pattern shows a strong increase in vitrinite reflectance values toward the east and southeastern parts of the study area likely caused by (1) an eastward increase in burial depth, (2) a probable eastward increase in HF, and, (3) probable magmatic activity. An increase in total erosion toward the eastern and southeastern parts was also observed with a maximum erosional amount of approximately 8 km (5 mi) in the southeastern part of the study area. The basin modeling of this area predicts that the main phase of hydrocarbon generation occurred during the Carboniferous–Early Permian subsidence. The magmatic events that occurred during the Permian–Triassic caused renewed pulses of hydrocarbon generation. A large amount of the generated hydrocarbons was lost to the surface because of a lack of seals. However, the numerical simulation predicts accumulations of about 2 tcf (57 billion m3) of methane generated from Carboniferous coals in the south and main synclines, where Lower Permian seal rocks are preserved. Finally, this study provides data on methane resources along the northern flank of the basin, which remains a significant frontier for natural gas exploration.
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