000			02965nab a2200253 4500
005			20260520002149.0
008			260224s2019 xxu ing
041			_aInglés
245	0	0	_aPetroleum systems modelling in a fold-and-thrust belt setting _bThe inverted Cameros Basin, north-central Spain
260			_a _b _cabr. 2019
270			_a26/08/2019 ; 16/08/2019
300			_a27 p. ; 145-172
520			_aTranscripción del resumen del autor: The Mesozoic Cameros Basin, northern Spain, was inverted during the Cenozoic Alpine orogeny when the Tithonian – Upper Cretaceous sedimentary fill was uplifted and partially eroded. Tar sandstones outcropping in the southern part of the basin and pyrobitumen particles trapped in potential source rocks suggest that hydrocarbons have been generated in the basin and subsequently migrated. However, no economic accumulations of oil or gas have yet been found. This study reconstructs the evolution of possible petroleum systems in the basin from initial extension through to the inversion phase, and is based on structural, stratigraphic and sedimentological data integrated with petrographic and geochemical observations. Petroleum systems modelling was used to investigate the timing of source rock maturation and hydrocarbon generation, and to reconstruct possible hydrocarbon migration pathways and accumulations. In the northern part of the basin, modelling results indicate that the generation of hydrocarbons began in the Early Berriasian and reached a peak in the Late Barremian – Early Albian. The absence of traps during peak generation prevented the formation of significant hydrocarbon accumulations. Some accumulations formed after the deposition of post-extensional units (Late Cretaceous in age) which acted as seals. However, during subsequent inversion, these reservoir units were uplifted and eroded. In the southern sector of the basin, hydrocarbon generation did not begin until the Late Cretaceous due to the lower rates of subsidence and burial, and migration and accumulation may have taken place until the initial phases of inversion. Sandstones impregnated with bitumen (tar sandstones) observed at the present day in the crests of surface anticlines in the south of the basin are interpreted to represent the relics of these palaeo-accumulations. Despite a number of uncertainties which are inherent to modelling the petroleum systems evolution of an inverted and overmature basin, this study demonstrates the importance of integrating multidisciplinary and multi-scale data to the resource assessment of a complex fold-and-thrust belt.
581			_a2
773	0		_tJournal of Petroleum Geology _g
942			_cARTICULO
100	1		_aOmodeo-Salé, S. _959141
100	1		_aOndrak, R. _959142
100	1		_aArribas, J. _959143
100	1		_aMas, R. _959144
100	1		_aGuimera, J. _959145
100	1		_aMartínez, L. _959146
999			_c193107 _d193107