Characterization of the source rocks of a paleo-petroleum system (Cameros Basin) based on organic matter petrology and geochemical analyses

Omodeo-Salé, Silvia; Suárez‐Ruíz, Isabel; Arribas, José; Mas, Ramón; Martı́nez, Luis; Herrero, M.J.

doi:10.1016/j.marpetgeo.2016.01.002

Cited by 9 publications

(12 citation statements)

References 22 publications

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“…Thus, these units could include the original source rocks. In these deposits, pyrobitumen constitutes most of the residual organic carbon forming the TOC measured by Rock-Eval analysis in a recent study (Omodeo-Salé et al, 2016) (Fig. 5a).…”

Section: Evidence Of Hydrocarbon Generation Migration and Accumulatimentioning

confidence: 80%

“…The observation of a fine-grained residue in the Valdeprado Formation (DS3) ( Fig. 4i) is intepreted as evidence for the thermal transformation of liptinite-rich organic matter into hydrocarbons (Omodeo-Salé et al, 2016;. Thus, these units could include the original source rocks.…”

Section: Evidence Of Hydrocarbon Generation Migration and Accumulatimentioning

confidence: 95%

“…4g, h) at temperatures over 300°C (Rahimi et al, 1998;Taylor et al, 1998). This was most likely related to the circulation of hydrothermal fluids (Omodeo-Salé et al, 2016).…”

Section: Evidence Of Hydrocarbon Generation Migration and Accumulatimentioning

confidence: 99%

“…However no oil or gas accumulations of economic size have so far been discovered in the basin. The traces of hydrocarbons observed in the matrix of various stratigraphic units are interpreted as the relics of hydrocarbon generation and migration processes in palaeo-source rocks and/or carrier units Mantilla-Figueroa et al, 1998;Ochoa et al, 2007;Omodeo-Salé et al, 2016). Although the evidence suggests the existence of an active petroleum system in the Cameros Basin, the origin of these hydrocarbons has been poorly investigated to-date.…”

Section: Introductionmentioning

confidence: 99%

“…The studies were in general based on outcrop data as little geophysical or subsurface data (seismic, gravimetry, wells-logs or cores) are available. Recent studies of the thermal evolution of the basin and of organic-rich intervals have improved the general understanding of the basin's burial and maturation history (Omodeo-Salé et al, 2016. By integrating these multidisciplinary data, the present study attempts to reconstruct the petroleum generation, migration and accumulation history of the Cameros Basin.…”

Section: Introductionmentioning

confidence: 99%

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Petroleum Systems Modelling in a Fold‐and‐thrust Belt Setting: The Inverted Cameros Basin, North‐central Spain

Omodeo-Salé

Ondrak

Arribas

et al. 2019

Journal of Petroleum Geology

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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.

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Section: Evidence Of Hydrocarbon Generation Migration and Accumulatimentioning

confidence: 80%

Section: Evidence Of Hydrocarbon Generation Migration and Accumulatimentioning

confidence: 95%

“…4g, h) at temperatures over 300°C (Rahimi et al, 1998;Taylor et al, 1998). This was most likely related to the circulation of hydrothermal fluids (Omodeo-Salé et al, 2016).…”

Section: Evidence Of Hydrocarbon Generation Migration and Accumulatimentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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