Potential petroleum source rocks in a tertiary sequence of the Eastern Venezuelan Basin

Quintero, Karla; Monaco, Guillermo Lo; López, Liliana; Mónaco, Salvador Lo; Escobar, Gastón; Peralba, M. C. R.; Franco, Noelia; Kalkreuth, W.

doi:10.1016/j.jsames.2012.03.002

Cited by 4 publications

(2 citation statements)

References 16 publications

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“…This biomarker, which has two isomers, 18α(H)-oleanane and 18β(H)-oleanane, is only found in Tertiary and Cretaceous (<130 million years) rocks and oils, and is highly specific for angiosperm plant inputs (Wang et al 2006). Since it is well known as a specific biomarker, along with gammacerane and β-carotane, its use as geochemical forensic approachesis fundamental (Boehm et al 1997, Quintero et al 2012, Stout & Wang 2016.…”

Section: Biomarkers: Organic Matter Type and Sedimentation Environmentmentioning

confidence: 99%

Multiple reaction monitoring tool applied in the geochemical investigation of a mysterious oil spill in northeast Brazil

Carregosa

Santos

Sá

et al. 2021

An. Acad. Bras. Ciênc.

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In 2019, much of the northeastern coast of Brazil was impacted by a mysterious oil spill that caused an environmental disaster affecting 1009 beaches. Four samples were collected in the beaches between Sergipe and Pernambuco for geochemical characterization of the spilled oil and to compare with those main produced in Sergipe-Alagoas basin. Our approach in this evaluation was the use of a highly selective technique of sequential mass spectrometry by multiple reaction monitoring, to obtain the diagnostic ratios of hopanes and steranes biomarkers. Using these biomarkers ratios associated with multivariate statistical analysis, we found direct correlation between the spilled oil collected along the northeastern coast and no relationship between Sergipe-Alagoas basin crude oils was found. Furthermore, reported data for oils from Orinoco belt in Venezuelan basins were used for qualitative evaluation considering the indicative aspects suggested by the literature. Presence of highly specifi c biomarker 18α(H)-oleanane, and fi ve other important diagnostic ratios evidenced correlation between the spilled oil and Naricual formation crude oils. Besides, due to the oleanane index, Ayacucho's crude oil presented the strongest factor of correlation with the spilled oil found on the northeast coast of Brazil.

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Section: Biomarkers: Organic Matter Type and Sedimentation Environmentmentioning

confidence: 99%

Multiple reaction monitoring tool applied in the geochemical investigation of a mysterious oil spill in northeast Brazil

Carregosa

Santos

Sá

et al. 2021

An. Acad. Bras. Ciênc.

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“…From the ratio between T26/T25 and T24/T23 (Fig. 6a), it is possible to define whether the lithology of the parent rock is marine or lacustrine and carbonate or shale type [21]. The data obtained for these relationships in the samples are presented in Table 1 and Fig.…”

Section: Componentsmentioning

confidence: 99%

Crude oils from Austral and Golfo San Jorge Basins. Similarity and differences based on Biomarker Ratios

Tomas¹,

Vargas²,

Acuña

2021

DYNA

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The biomarker profiles are characteristic of oils. The goal of this study was to evaluate the biomarkers in oil samples using geochemical analysis. Oil samples were obtained from Austral Basin and from Golfo San Jorge Basin. Specifically, the aliphatic and aromatic fractions were analyzed by Gas Chromatography coupled to Mass Spectrometry. Biomarker ratios were calculated for isoprenoids, terpanes, steranes to correlate the organic matter precursor, deposition environment, and others to differentiate distinct crude oil sources. Based on the specific parameters, the crude of the Austral Basin appears to have been generated from organic matter type II-III (mixed), in deposition environments with moderate oxygen concentration, associated with a siliciclastic lithology and a moderate to high thermal maturity. On the contrary, the crude oils from the Golfo San Jorge Basin displayed biomarkers profiles characteristics to a type II (marine) kerogen, corresponding to an anoxic deposition environment, carbonated lithology and low thermal maturity.

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Cretaceous source rocks and associated oil and gas resources in the world and China: A review

2014

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The Cretaceous is one of the most important stratigraphic intervals for hydrocarbon source rocks. This article summarizes the distribution, formation, and development characteristics of Cretaceous source rocks and associated oil and gas resources in the world and China, aiming at improving the understanding of this hydrocarbon enrichment and at broadening domestic exploration. Outside China, these rocks are generally formed in marine or transgressive environments during both the Upper and Lower Cretaceous. The majority of Cretaceous source rocks are located in the Persian Gulf, Mediterranean, and Gulf Coast of the USA. Kerogen types within these source rocks have distinct spatial distribution characteristics, with high-latitude Boreal Realm, Tethyan Realm and South Gondwana Realm source rocks containing type III, II, II-III kerogens, respectively. Cretaceous source rocks in China can be mainly divided into four zones: Eastern, Central, Northwest, and Qinghai-Tibet Plateau zones. The majority of Chinese source rocks formed in the Early Cretaceous, whereas the most productive source rocks are developed in the Upper Cretaceous, such as those within the Songliao Basin. Most of these events. Cretaceous source rocks are formed in four distinctive ways: 1) during Oceanic Anoxic Events and associated global sea-level rises, 2) in Black Sea-type retention basins, 3) during transgression and 4) paleoclimate, paleotopography, transgression, and Oceanic Anoxic Events. These four major controlling factors indicate that China's hydrocarbon exploration within the Cretaceous should focus on two key areas with extremely low exploration levels, the Qinghai-Tibet Plateau and the southeastern coast of China.

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Potential petroleum source rocks in a tertiary sequence of the Eastern Venezuelan Basin

Cited by 4 publications

References 16 publications

Multiple reaction monitoring tool applied in the geochemical investigation of a mysterious oil spill in northeast Brazil

Multiple reaction monitoring tool applied in the geochemical investigation of a mysterious oil spill in northeast Brazil

Crude oils from Austral and Golfo San Jorge Basins. Similarity and differences based on Biomarker Ratios

Cretaceous source rocks and associated oil and gas resources in the world and China: A review

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