Geochemical characterization of oils and their correlation with Jurassic source rocks from the Lusitanian Basin (Portugal)

Brito, Marco; Rodrigues, R. F.; Baptista, Rui; Duarte, Luís V.; Azerêdo, Ana C.; Jones, Cleveland M.

doi:10.1016/j.marpetgeo.2017.05.010

Cited by 16 publications

(20 citation statements)

References 30 publications

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“…The new geochemical data presented here substantiate the high TOC contents previously determined in some parts of the Coimbra Fm at S. Pedro de Moel [e.g. Brito et al, 2017, Poças Ribeiro et al, 2013. It is important to point out that both the Sinemurian and Pliensbachian of the Lusitanian Basin are known for the occurrence of organic-rich deposits, i.e.…”

Section: Organic Matter Depositionsupporting

confidence: 88%

“…the Água de Madeiros and Vale das Fontes formations (Figure 1C), both potential hydrocarbon source rocks [e.g. Brito et al, 2017, 2013, Oliveira et al, 2006, Poças Ribeiro et al, 2013, Silva et al, 2011, Sêco et al, 2018. With the high TOC values (maximum of 12 wt%) determined in the present study, especially in the UA and UF (Figure 5), the importance of Coimbra Fm in this sector of the LB as a potential source rock, is also confirmed.…”

Section: Organic Matter Depositionsupporting

confidence: 81%

“…According to the ammonite record [see Dommergues et al, 2004, Duarte et al, 2014b, the Coimbra Fm in this region is dated from the lower to upper Sinemurian. Previous studies in this region have also focused on ostracod assemblages [Cabral et al, 2013[Cabral et al, , 2015, organic and petrographic geochemistry [Brito et al, 2017, Poças Ribeiro et al, 2013 and gamma-ray analysis [Sêco et al, 2018].…”

Section: Geological Settingmentioning

confidence: 99%

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Shallow-water carbonates of the Coimbra Formation, Lusitanian Basin (Portugal): contributions to the integrated stratigraphic analysis of the Sinemurian sedimentary successions in the western Iberian Margin

Duarte¹,

Silva²,

Azerêdo³

et al. 2023

Comptes Rendus. Géoscience

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Section: Organic Matter Depositionsupporting

confidence: 88%

Section: Organic Matter Depositionsupporting

confidence: 81%

Section: Geological Settingmentioning

confidence: 99%

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Shallow-water carbonates of the Coimbra Formation, Lusitanian Basin (Portugal): contributions to the integrated stratigraphic analysis of the Sinemurian sedimentary successions in the western Iberian Margin

Duarte¹,

Silva²,

Azerêdo³

et al. 2023

Comptes Rendus. Géoscience

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“…1) which were presented in an unpublished report by Beicip-Franlab (1996). All other analytical data for oils, oil shows and extracts are taken from Brito et al (2017). The combined data-set is presented in Table 2 and Figs 3, 4 and 5. Stable carbon isotopes δ 13 C values for the oil sample from the Moreia-1 well and for the oil shows from the Sismaria outcrop in the northern Lusitanian Basin (6, Fig.…”

Section: Resultsmentioning

confidence: 99%

“…1). Reservoir rocks were limestones from the Coimbra, Água de Madeiros, Montejunto and Abadia Formations, and sandstones from the Abadia, Boa Viagem and Figueira da Foz Formations (DGEG Archives; Duarte and Soares, 2002;Dinis et al, 2008;Kullberg et al, 2013;Brito et al, 2017). The oils and show samples are detailed in Table 1.…”

Section: Oils and Oil Showsmentioning

confidence: 99%

Jurassic Petroleum Systems in the Lusitanian Basin, Portugal: New Insights Based on Oil – Source Rock Correlations

Brito,

Rodrigues,

Baptista

et al. 2023

Journal of Petroleum Geology

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New stable carbon isotope and biomarker data for oils and source rock extracts from the Lusitanian Basin, Portugal, were studied in order to investigate the petroleum systems which are present there. The new analytical data was combined with data presented in previous publications, and oil‐oil and oil‐ source rock correlations were carried out. Three genetic groups of oils (Groups 1, 2 and 3), belonging to three different petroleum systems, were identified:Group 1 oils occur in the northern sector of the Lusitanian Basin and were generated by the Coimbra Formation (Sinemurian) source rock. Reservoir rocks for oils in this group are the Coimbra, Água de Madeiros (upper Sinemurian – lower Pliensbachian), Boa Viagem (Kimmeridgian –Tithonian) and Figueira da Foz (upper Aptian – Cenomanian) Formations. Other potential source rocks in the northern sector of the basin, such as the Polvoeira Member of the Água de Madeiros Formation and the Marly Limestones with Organic Facies (MLOF) Member of the Vale das Fontes Formation (Pliensbachian), had biomarker characteristics which differed from those of the Group 1 oils and did not therefore generate them.Group 2 oils occur in the central and southern sectors of the basin. The source rock is the Cabaços Formation (middle Oxfordian), and reservoir rocks are the Montejunto (middle‐upper Oxfordian) and Abadia (Kimmeridgian) Formations.Group 3 is represented by an oil sample from the central sector of the Lusitanian Basin. Both the source rock and the reservoir rock for the oil are the Montejunto Formation.Geochemical data combined with the regional tectono‐stratigraphic history suggest that the generation‐migration‐accumulation of most of the oil (critical moment) in the Coimbra – Coimbra ‐ Água de Madeiros ‐ Boa Viagem ‐ Figueira da Foz (!) petroleum system occurred in the early Campanian. For the Cabaços – Montejunto ‐ Abadia (!) and Montejunto – Montejunto (!) petroleum systems, the critical moment occurred in the late Cenomanian.

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The Late Triassic–Middle Jurassic Passive Margin Stage

Gómez

Aguado

Azerêdo

et al. 2019

The Geology of Iberia: A Geodynamic Approach

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Geochemical characterization of oils and their correlation with Jurassic source rocks from the Lusitanian Basin (Portugal)

Cited by 16 publications

References 30 publications

Shallow-water carbonates of the Coimbra Formation, Lusitanian Basin (Portugal): contributions to the integrated stratigraphic analysis of the Sinemurian sedimentary successions in the western Iberian Margin

Shallow-water carbonates of the Coimbra Formation, Lusitanian Basin (Portugal): contributions to the integrated stratigraphic analysis of the Sinemurian sedimentary successions in the western Iberian Margin

Jurassic Petroleum Systems in the Lusitanian Basin, Portugal: New Insights Based on Oil – Source Rock Correlations

The Late Triassic–Middle Jurassic Passive Margin Stage

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