Methylated dicyclic and tricyclic aromatic hydrocarbons in crude oils from the Handil field, Indonesia

Radke, M.; Garrigues, Philippe; Willsch, H.

doi:10.1016/0146-6380(90)90182-y

Cited by 78 publications

(19 citation statements)

References 45 publications

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“…j Calculated vitrinite reflectance equivalent based on the MPDF (Boreham et al., ) Rc(MPDF) = 2.242(MPDF)−0.166. k Methylphenanthrene ratio MPR = 2‐MP/1‐MP (Radke et al., ). l Calculated vitrinite reflectance based on the MPR (Rc(MPR) = 0.99 log 10 MPR + 0.94) (Radke et al., ).…”

Section: Resultsmentioning

confidence: 99%

“…Thermal maturity parameters based on the methylphenanthrene distribution factor (MPDF) and methylphenanthrene ratio (MPR; Boreham, Crick, & Powell, ; Radke, Garrigues, & Willsch, ; Radke, Willsch, & Leythaeuser, ) increase with depth ranging from Rc (MPDF) = 0.54%–1.27% (Table ). These values correspond to the onset of the oil window (Rc ~0.6%) to the late oil window (Rc ~1.8%) and are similar to thermal maturities based on aromatic hydrocarbons in Altree 2 (Summons, Taylor, & Boreham, ) and in other wells through the Velkerri Formation (Boreham et al., ; Warren et al., ; George & Ahmed, ).…”

Section: Resultsmentioning

confidence: 99%

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Microbial assemblage and palaeoenvironmental reconstruction of the 1.38 Ga Velkerri Formation, McArthur Basin, northern Australia

et al. 2019

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The ca . 1.38 billion years (Ga) old Roper Group of the McArthur Basin, northern Australia, is one of the most extensive Proterozoic hydrocarbon‐bearing units. Organic‐rich black siltstones from the Velkerri Formation were deposited in a deep‐water sequence and were analysed to determine their organic geochemical (biomarker) signatures, which were used to interpret the microbial diversity and palaeoenvironment of the Roper Seaway. The indigenous hydrocarbon biomarker assemblages describe a water column dominated by bacteria with large‐scale heterotrophic reworking of the organic matter in the water column or bottom sediment. Possible evidence for microbial reworking includes a large unresolved complex mixture ( UCM ), high ratios of mid‐chained and terminally branched monomethyl alkanes relative to n ‐alkanes—features characteristic of indigenous Proterozoic bitumen. Steranes, biomarkers for single‐celled and multicellular eukaryotes, were below detection limits in all extracts analysed, despite eukaryotic microfossils having been previously identified in the Roper Group, albeit largely in organically lean shallower water facies. These data suggest that eukaryotes, while present in the Roper Seaway, were ecologically restricted and contributed little to export production. The 2,3,4‐ and 2,3,6‐trimethyl aryl isoprenoids ( TMAI ) were absent or in very low concentration in the Velkerri Formation. The low abundance is primary and not caused by thermal destruction. The combination of increased dibenzothiophene in the Amungee Member of the Velkerri Formation and trace metal redox geochemistry suggests that degradation of carotenoids occurred during intermittent oxygen exposure at the sediment–water interface and/or the water column was rarely euxinic in the photic zone and likely only transiently euxinic at depth. A comparison of this work with recently published biomarker and trace elemental studies from other mid‐Proterozoic basins demonstrates that microbial environments, water column geochemistry and basin redox were heterogeneous.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Microbial assemblage and palaeoenvironmental reconstruction of the 1.38 Ga Velkerri Formation, McArthur Basin, northern Australia

et al. 2019

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“…Geochemical parameters related to methylated naphthalenes can be used to indicate the difference of maturity, biodegradation, and source input between oil and sedimentary organic matter samples, even though some saturated hydrocarbon compositions such as steranes and terpanes isomer ratios get to equilibrium end (Alexander, et al, 1985;Radke, et al, 1990;1994). Poor signal-to-noise ratios of most of the oil samples from the Fushan Depression were observed in the mass chromatograms of biomarkers, especially in the Huachang light oils and condensates.…”

Section: Oil Charging Direction and Conduitmentioning

confidence: 99%

Characteristics of oil and gas accumulation in Yong’an-Meitai area of the Fushan Depression, Beibuwan Basin, South China Sea

Wang

et al. 2007

Pet. Sci.

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The Yong'an-Meitai area is the focus of the present exploration in the Fushan Depression, Beibuwan Basin, South China Sea. All oils from this area are geochemically characterized by higher Pr/Ph ratio, higher proportion of heavy molecular weight hydrocarbons, and higher proportion of C 29 regular steranes, which indicate that the organic matter of source rocks might have been deposited in an oxidizing palaeoenvironment and be dominated by higher plant organic matter input. The oil from E3w2 (the second member ofWeizhou Fm. ofthe Oligocene) has a much higher density, relatively higher Pr/nC 17 and Ph/nC I8 ratios, and a "UCM-unresolved complex mixture" on gas chromatograms, which indicate that it has been slightly biodegraded. CPI and other terpane and sterane isomer ratios suggest they are all mature oils. The timing of oil charging in E3w2 and E 21] (the first member of the Liushagang Fm. of the Eocene) determined by the homogenization temperatures of fluid inclusions and thermal evolution history are from 9-3 Ma and 8-3 Ma, respectively. Thus, the interpretation ofE3w2 as a secondary reservoir is unlikely. The timing of oil charging is later than that of hydrocarbon generating and expulsion of Liushagang Fm. source rocks and trap formation, which is favorable for oil accumulation in this area. All molecular parameters that are used for tracing oil filling direction decrease with shallower burial depth, which suggests vertical oil migration. The widely occurring faults that penetrate through the source rocks ofthe Liushagang Fm. may serve as a fine oil charging conduit.

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“…The distributions of methyl homologs of naphthalene and phenanthrene are controlled by thermal maturity [11]. Various parameters developed from methylated isomers of aromatic hydrocarbons have been found useful as thermal maturity indicators [11][12][13][14][15]. Methylphenanthrene ratio (MPR) has been used to differentiate the timing of generation of a suite of oils and their thermal maturity [16].…”

Section: Introductionmentioning

confidence: 99%

Factors Controlling Leaching of Polycyclic Aromatic Hydrocarbons from Petroleum Source Rock Using Nonionic Surfactant

et al. 2012

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The extraction of polycyclic aromatic hydrocarbons (PAHs) from petroleum source rock by nonionic surfactants with the assistance of microwave irradiation was investigated and the conditions for maximum yield were determined. The results showed that the extraction temperatures and type of surfactant have significant effects on extraction yields of PAHs. Factors such as surfactant concentration, irradiation power, sample/solvent ratio and mixing surfactants (i.e., mixture of surfactant at specific ratio) also influence the extraction efficiencies for these compounds. The optimum temperature for microwaveassisted nonionic surfactant extraction of PAHs from petroleum source rock was 120°C and the best suited surfactant was Brij 35. The new method showed extraction efficiencies comparable to those afforded by the Soxhlet extraction method, but a reduction of the extraction times and environmentally friendliness of the new nonionic surfactant extraction system are clear advantages. The results also show that microwave-assisted nonionic surfactant extraction is a good and efficient green analytical preparatory technique for geochemical evaluation of petroleum source rock.

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Methylated dicyclic and tricyclic aromatic hydrocarbons in crude oils from the Handil field, Indonesia

Cited by 78 publications

References 45 publications

Microbial assemblage and palaeoenvironmental reconstruction of the 1.38 Ga Velkerri Formation, McArthur Basin, northern Australia

Microbial assemblage and palaeoenvironmental reconstruction of the 1.38 Ga Velkerri Formation, McArthur Basin, northern Australia

Characteristics of oil and gas accumulation in Yong’an-Meitai area of the Fushan Depression, Beibuwan Basin, South China Sea

Factors Controlling Leaching of Polycyclic Aromatic Hydrocarbons from Petroleum Source Rock Using Nonionic Surfactant

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