Role of nickel and vanadium in petroleum classification

Barwise, A.J.G.

doi:10.1021/ef00024a005

Cited by 282 publications

(169 citation statements)

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“…Udo et al, 1992, reported that the V/Ni ratio decreases with increasing maturity. The lower V/Ni ratios are typically of terrestrially derived source rocks (Barwise, 1990;Udo et al, 1992 andNwachukwu et al, 1995). This suggests that the former groups of samples are more matured than the later.…”

Section: Ratios Of Transition Metalsmentioning

confidence: 99%

“…These ratios are used in the determination of source rocks types, depositional environment and maturation of crude oils. This is because these ratios remain unchanged irrespective of digenetic and inreservoir alteration (Lewan, 1984;Barwise, 1990 andUdo et al, 1992).…”

Section: Ratios Of Transition Metalsmentioning

confidence: 99%

“…The nature of occurrence of trace metals, their distribution patterns and concentration in crude oils can give information on the origin, migration, environment of deposition and maturation of petroleum as well as providing a basis for regional geochemical prospecting (Elirich et al, 1985;Barwise, 1990, Oluwole et al, 1993.…”

Section: Introductionmentioning

confidence: 99%

“…For instance low V/Ni ratios (< 0.5) are expected for petroleum or crude oil derived from marine organic matter, with high to moderate sulphur content. Crude oil or petroleum from lacustrine and terrestrial organic matter has V/Ni ratios (1-10) (Barwise, 1990). Oil from marine organic matter have high concentrations of metals (particularly Ni and V), this is expected for marine source rocks where there is an abundant input of porphyrin -precursor chlorophylls to the organic matter derived from algae and bacteria (Barwise, 1990).…”

Section: Introductionmentioning

confidence: 99%

“…Crude oil or petroleum from lacustrine and terrestrial organic matter has V/Ni ratios (1-10) (Barwise, 1990). Oil from marine organic matter have high concentrations of metals (particularly Ni and V), this is expected for marine source rocks where there is an abundant input of porphyrin -precursor chlorophylls to the organic matter derived from algae and bacteria (Barwise, 1990). Moderate quantities of metals are found in oils derived from lacustrine source rocks while little nickel and vanadium is found in land-plant derived oils.…”

Section: Introductionmentioning

confidence: 99%

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Trace Metals Geochemistry of Crude Oils from Umutu/Bomu Fields in South West Niger Delta Nigeria

Mudiaga¹,

Nicolás²,

Leo³

2011

EER

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Seven crude oil samples were collected from two oil fields south Niger Delta Nigeria which had not been previously characterized with trace metals and analyzed using Atomic absorption spectroscopy. The concentration of Fe ranges from 0.38 to 31.53 ppm, Zn ranges from 0.65 to 80.69 ppm, Pb ranges from 1.39 to 25.00 ppm, Cu ranges from 0.26 to 6.43 ppm, Cr ranges 0.60 to 2.94ppm, Cd ranges from 0.09 to 0.33ppm, Ni ranges from 0.63 to 8.93 ppm, Mn ranges from 0.21 to 2.25 ppm, V ranges 0.30 to 0.72 ppm, Co ranges from 0.38 to 0.62 ppm. The divergent ratios calculated from the concentration of the trace metals include V/Ni, V/(V+Ni), Co/ Ni and Fe/V, which varies between 0.36 and 0.67 for V/Ni, between 0.07 and 0.40 for V/(V+Ni), between 0.06 and 0.99 for Co/ Ni and finally between 1.26 and 43.78 for Fe/V. Two genetic groups of crude oils are identified and the organic matter originated from mixed sources deposited in an oxic environment.

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Section: Ratios Of Transition Metalsmentioning

confidence: 99%

Section: Ratios Of Transition Metalsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Trace Metals Geochemistry of Crude Oils from Umutu/Bomu Fields in South West Niger Delta Nigeria

Mudiaga¹,

Nicolás²,

Leo³

2011

EER

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Sedimentary factors controlling the organic matter enrichment in oil shale, Seyitömer Lacustrine Basin, Western Anatolia: New implications from organic and inorganic geochemistry

Kara Gülbay,

Özyurt,

Korkmaz

2024

The Depositional Record

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Western Anatolia, an important segment of the Alp‐Himalayan Belt, hosts numerous Neogene lacustrine basins with potential oil shale reserves surpassing 1.6 billion tonnes. Among these basins, the Seyitömer Basin (Kütahya) stands out, containing oil shales that are intercalated with claystone, marl, limestone and coal layers. This study presents a comprehensive dataset of organic and inorganic chemistry to gain insight into the palaeoclimate and palaeoenvironmental factors that control the enrichment of organic matter. The studied samples exhibit high total organic carbon contents, averaging 12.85% (ranging from 2.22 to 36.21%), high hydrogen indices (486–812 mgHC/g rock) and low oxygen indices (33–70 mgCO2/g total organic carbon), indicating their substantial hydrocarbon‐source potential. These characteristics indicate predominantly ‘excellent’ to occasionally ‘very good’ source rock qualities and very high oil potential. Their pyrolysis, gas chromatography and gas chromatography–mass spectrometer parameters indicate an immature‐early mature characteristic for Seyitömer oil shale samples. They comprise dominantly Type‐I kerogen with minor Type‐II kerogen and lacustrine algal organic matter. Their sedimentological characteristics, along with various geochemical values, such as total organic carbon versus S, B versus Ga and dibenzothiophene/phenanthrene, reveal a moderately deep fresh/brackish to saline lacustrine environment. The Ga/Rb, K/Al and Sr/Cu ratios suggest dominantly humid and warm climate conditions, occasionally interrupted by periods of less humidity. The prevalence of warm and humid climate conditions leads to intense chemical weathering processes, supported by high Chemical Index of Alteration and low Rb/Sr ratios in the associated oil shale samples. Intense chemical weathering and high runoff resulted in dissolved nutrient enrichment, promoting ecological dynamics favourable to increased productivity. Their low Pr/Ph and Mo/total organic carbon ratios, high Ni/Co ratio and, relatively low MoEF/UEF ratio, along with well‐developed lamination of the oil shales, indicate the presence of anoxic conditions in the bottom water. These anoxic conditions would have facilitated the preservation potential of organic matter in the samples. Thus, the palaeoclimate conditions integrated with sedimentary factors have an important role in the ecological dynamic and physical–chemical environmental conditions, ultimately contributing to the organic matter enrichment of the studied samples. This work provides a case study to better understand the sedimentary factors controlling organic matter enrichment in the lacustrine basins of the Alp‐orogenic belt.

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Rare earth elements (REEs) geochemistry of Sinian–Cambrian reservoir solid bitumens in Sichuan Basin, SW China: potential application to petroleum exploration

et al. 2015

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In order to evaluate rare earth elements (REEs) as a potential proxy for solid bitumen classification, we employed traditional correlation approaches, such as carbon isotopes and V/(V + Ni) ratios, to infer the source rocks of Sinian-Cambrian reservoir solid bitumens in the Sichuan Basin and analyse solid bitumens for their REE compositions by inductively coupled plasma-mass spectrometry. Our data suggested that Sinian-Cambrian reservoir solid bitumens were primarily sourced from the lower Cambrian shales deposited under anoxic-euxinic conditions. REE and their associated parameters seemed to be more sensitive to classify solid bitumens than traditional correlation approaches. REE concentrations played a dominant role and fractionation degree between light and heavy REE and played a secondary role in solid bitumen classification. REE concentration and pattern in solid bitumens might be controlled by two processes, including inheritance from source rocks and water-rock interaction. The major factor controlling REE concentrations in solid bitumens was the type of organic matter of source rocks. Authigenic minerals in solid bitumens formed by water-rock interaction appeared to have little influence on REE compositions of solid bitumens because of their trace contents. Overall, REE could be used as a novel complementary approach to solid bitumen classification in complicated petroleum systems.

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Role of nickel and vanadium in petroleum classification

Cited by 282 publications

References 0 publications

Trace Metals Geochemistry of Crude Oils from Umutu/Bomu Fields in South West Niger Delta Nigeria

Trace Metals Geochemistry of Crude Oils from Umutu/Bomu Fields in South West Niger Delta Nigeria

Sedimentary factors controlling the organic matter enrichment in oil shale, Seyitömer Lacustrine Basin, Western Anatolia: New implications from organic and inorganic geochemistry

Rare earth elements (REEs) geochemistry of Sinian–Cambrian reservoir solid bitumens in Sichuan Basin, SW China: potential application to petroleum exploration

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