Petroleum Systems in the Rubio and Burgua Depressions, Venezuela

Callejn, Angel Francisco; Ostos, Marino; Yoris, Franklin; Briceo, Henry; Talukdar, Suhas C.; Lander, Rafael

doi:10.1306/m79877c42

Cited by 2 publications

(1 citation statement)

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“…systems was proposed with the identification of oil from the Paleocene(? )-middle Eocene (46), and Los Cuervos and Carbonera formations have been proposed as excellent potential source rocks (9). However, the low maturity of coals from Barco, Los Cuervos and Carbonera formations indicates low potential to generate and expel oil (5,8,47) because in coals, the beginning of generation is related to Tmax of 435 °C (45), and the reported values of Tmax for these formations are in the range of 451-458 °C (3 samples from Barco Fm.)…”

Section: Origin Of Oils From Los Manueles Fieldmentioning

confidence: 99%

Assessment of terrigenous and marine sourced oils mixtures: Los Manueles field, Maracaibo basin Venezuela

López

Crespo

Mónaco

et al. 2022

CT&F Cienc. Tecnol. Futuro

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Seven crude oil samples from Los Manueles field, Maracaibo Basin, Venezuela, were analyzed to evaluate oil mixtures associated with different oil charges into the reservoirs. Analyses of the bulk physicochemical parameters suggest variations in the API gravity, the concentration of saturated and aromatic hydrocarbons, NSO compounds + asphaltenes, sulfur, vanadium, nickel, and the biomarkers distribution. The oils were divided in two groups: G-I with high saturated hydrocarbons and low NSO compounds + asphaltenes, sulfur, vanadium and nickel, a bimodal distribution of n-alkanes, high Pr/Ph and oleanane index, low steranes index, low abundance of tricyclic terpanes and C35S/C34S < 0.54 and G-II with low saturated hydrocarbons and high NSO compounds+ asphaltenes, sulfur, vanadium and nickel, an unimodal distribution of n-alkanes with low Pr/Ph and oleanane index, high steranes index, abundance of tricyclic terpanes and C35S/C34S > 0.70. G-I has a higher contribution of terrigenous organic matter compared to G-II, characterized by a higher contribution of marine organic matter. Source rock lithology biomarker indicators suggest marine shale as the source rock for oils of terrigenous origin. The results indicate that oils were generated by two independent source rocks, La Luna Formation and a secondary source rock with terrigenous organic matter, probably represented by the Capacho Formation.

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Section: Origin Of Oils From Los Manueles Fieldmentioning

confidence: 99%

Assessment of terrigenous and marine sourced oils mixtures: Los Manueles field, Maracaibo basin Venezuela

López

Crespo

Mónaco

et al. 2022

CT&F Cienc. Tecnol. Futuro

View full text Add to dashboard Cite

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Clumped isotope thermometry in deeply buried sedimentary carbonates: The effects of bond reordering and recrystallization

Shenton

Grossman

Passey

et al. 2015

Geological Society of America Bulletin

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We utilize carbonate clumped isotope thermometry to explore the diagenetic and thermal histories of exhumed brachiopods, crinoids, cements, and host rock in the Permian Palmarito Formation, Venezuela, and the Carboniferous Bird Spring Formation, Nevada, USA. Carbonate components in the Palmarito Formation, buried to ~4 km depth, yield statistically indistinguishable clumped isotope temperatures [T(Δ 47 )] ranging from 86 to 122 °C. Clumped isotope temperatures of components in the more deeply buried Bird Spring Formation (>5 km) range from ~100 to 165 °C and differ by component type, with brachiopods and pore-filling cements yielding the highest T(Δ 47 ) (mean = 153 and 141 °C, respectively) and crinoids and host rock yielding significantly cooler T(Δ 47 ) (mean = 103 and 114 °C). New high-resolution thermal histories are coupled with kinetic models to predict the extent of solid-state C-O bond reordering during burial and exhumation for both sites. Application of these models, termed "THRMs" (thermal history reordering models), suggests that brachiopods in the Palmarito Formation experienced partial bond reordering without complete equilibration of clumped isotopes at maximum burial temperature. In contrast, clumped isotope bonds of brachiopods from the Bird Spring Formation completely equilibrated at maximum burial temperature, and now reflect blocking temperatures achieved during cooling. The 40-50-°C-cooler clumped isotope temperatures measured in Bird Spring Formation crinoids and host rock can be explained by recrystallization and cementa tion during shallow burial combined with a greater inherent resistance to solid-state reordering than brachiopods.

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Petroleum Systems in the Rubio and Burgua Depressions, Venezuela

Cited by 2 publications

References 0 publications

Assessment of terrigenous and marine sourced oils mixtures: Los Manueles field, Maracaibo basin Venezuela

Assessment of terrigenous and marine sourced oils mixtures: Los Manueles field, Maracaibo basin Venezuela

Clumped isotope thermometry in deeply buried sedimentary carbonates: The effects of bond reordering and recrystallization

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