Benzo[b]naphthothiophenes and alkyl dibenzothiophenes: Molecular tracers for oil migration distances

Li, Meijun; Wang, T.-G.; Shi, Shengbao; Liu, Keyu; Ellis, Geoffrey S.

doi:10.1016/j.marpetgeo.2014.06.012

Cited by 68 publications

(31 citation statements)

References 40 publications

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“…-6 1,2-dimethyladamantane Mass spectral interpretation, ; mass spectral comparison, ; GC elution order, , , ; previous assignment of NA in OSPW and comparison of retention position and mass spectra with reference NA, , , Hall and Douglas (1981), Philp (1985), Chicarelli et al (1988); previous evidence of terpenoid NA in oil sands, , Azevedo et al (1992) and NIST MS library; previous assignment of monoaromatic terpenoid NA in tasmanite, dbt-I Sulphurcontaining tricyclic diaromatic -18 4-isobutyldibenzothiophene Comparison of retention position with synthetic reference hydrocarbon, Wilde (2015); mass spectral interpretation and mass spectral comparison, Andersson et al (2001), Bobinger et al (1999), (Andersson and Schade, 2004), Li et al (2014); previous assignment of NA (Porter, 1985), (Hawthone and Porter, 1968) and NIST MS library…”

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confidence: 99%

Naphthenic acids in oil sands process waters: Identification by conversion of the acids or esters to hydrocarbons

Wilde

Rowland

2018

Organic Geochemistry

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Concerns over the toxicity associated with 'naphthenic' acids (NA) within oil produced waters and oil sands process waters (OSPW), whether justified or not, have increased the need for the structural elucidation of NA. Certainly, oil sands mining operations, such as those in Alberta, Canada, result in the production of large volumes of OSPW contaminated with NA. Monitoring NA, predicting the toxicities and accounting for the toxicity of residual NA after clean-up treatments, have all been hindered by the lack of NA identifications.Recently, a method involving the conversion of the esters of petroleum NA to the corresponding hydrocarbons before analysis by comprehensive two-dimensional gas chromatography-mass spectrometry (GC×GC-MS), resulted in the most comprehensive study of bicyclic NA from petroleum to date. Here, we present results of the analysis by GC×GC-MS of NA extracted from OSPW after conversion of the acids or ester derivatives to the corresponding hydrocarbons. The identifications presented include novel alicyclic, aromatic and sulphur-containing hydrocarbons and thus, by inference, of the corresponding acids. This supports and significantly extends, previous identifications of OSPW NA as their methyl esters and can now be used to better inform environmental monitoring programs and toxicity studies.

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confidence: 99%

Naphthenic acids in oil sands process waters: Identification by conversion of the acids or esters to hydrocarbons

Wilde

Rowland

2018

Organic Geochemistry

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“…(e) (f) As demonstrated by previous studies, the relative abundances of methylated DBT isomers and the absolute concentrations in oils are also relative to migration distance. Therefore, the ratios of methylated DBT isomers and concentrations of total DBTs for oils derived from same source bed/kitchen can be applied to trace oil migration direction and charging pathway (Wang et al 2004;Li et al 2008Li et al , 2014aFang et al 2016Fang et al , 2017a. Except for one case study in a Tertiary sandstone reservoir in the Beibuwan Basin, South China Sea, we also found that the absolute concentration of DBTs was not an effective indicator for tracing oil migration orientation in Tarim Paleozoic carbonate reservoirs (Li et al, unpublished data).…”

Section: The Extent Of Biodegradation and Water Washingmentioning

confidence: 88%

Geochemistry and origin of Ordovician oils in the Rewapu Block of the Halahatang Oilfield (NW China)

Tang

Fang

et al. 2018

Pet. Sci.

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The oils in the Rewapu Block of the Halahatang Oilfield in the Tarim Basin (northwestern China) were geochemically analyzed by gas chromatography-mass spectrometry to investigate their origin and possible secondary alteration. The physical properties and chemical compositions of these Ordovician oils vary greatly, ranging from light to extremely heavy oils. All these oils belong to one single population and were derived from same source kitchen/bed. The differences in their chemical compositions and physical properties mainly result from secondary alteration of oils that were charged during the early phase of trap formation. The thickness of Upper Ordovician and Silurian caprocks of oil reservoirs in the Rewapu Block is higher than that in the north part of the Halahatang region, and therefore, significant biodegradation process is prevented. Compared to heavy oils in the north part, the Rewapu oils are dominated by light oils with no 25-norhopanes and no GC-MS ''hump'' (UCM: unresolved complex mixture) on the chromatographic baselines. The heavy oils in Wells RP7 and RP101C were primarily influenced by water washing since apparent reduction of alkylated dibenzothiophenes was observed. The local geological background favored the water washing alteration. The reservoir geochemical study has practical application in hydrocarbon exploration and predicts the nature of oils in this oilfield. Keywords Biodegradation Á Water washing Á Oil charging process Á Ordovician Á Tarim Basin Edited by Jie Hao

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“…The thermodynamic stability of alkyl DBT isomers decreases as follows: C 4 > C 2 > C 3 > C 1 . Therefore, the alkyl DBT parameters (e.g., the ratios 4-/1-MDBT; 2, 4-/1, 4-MDBT; and 4, 6-/1, 4-MDBT) should be enhanced by increasing maturity to be used effectively in evaluating oil maturity (Luo et al, 2001;Li et al, 2014). In addition, these alkyl DBT parameters are applicable to both immature-mature and highly mature oil (Li M J et al, 2013a) and for both marine and continental oil (Hughes et al, 1995;Li, 2000).…”

Section: ) Dibenzothiophenesmentioning

confidence: 99%

Geochemical Characteristics and Migration Pathways of Ordovician Carbonate Oil Reservoirs in the Tuoputai Area, Tarim Basin, Northwestern China

Liu

Shen

Cheng

et al. 2021

Acta Geologica Sinica (Eng)

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Exploration potential is huge and the oil resources are rich in the Ordovician reservoirs of the Tarim Basin. However, the mechanism of hydrocarbon accumulation is complex and not yet fully understood. In the Tuoputai area, the hydrocarbon migration pathways and characteristics of deep hydrocarbon accumulation are revealed through analyses of the physical data of rich oil and gas, the geochemical parameters of oil, and fluid inclusions. The results show that the Ordovician oils in the Tuoputai area have the same geochemical characteristics as the mixed oil from the Lower Cambrian source rock and the Middle–Upper Ordovician source rock. The Ordovician reservoirs have been charged three times: in the late Caledonian, late Hercynian, and Himalayan stages. Oil charging occurred in the Hercynian stage, in particular, as it is the main filling period of hydrocarbon. The north‐northeast (NNE)‐trending TP12CX major fault, active in in these times and is dominant migration channel of hydrocarbon, but there is segmentation affected by the difference of activities. Oil maturity is higher in the south than in the north and is abnormally high near the major fault. Parameters related to migration indicate that oil migrated northeastward along the NNE‐trending TP12CX major fault and adjusted laterally along the secondary faults and weathering crust, forming the present characteristics of oil and gas distribution.

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Benzo[b]naphthothiophenes and alkyl dibenzothiophenes: Molecular tracers for oil migration distances

Cited by 68 publications

References 40 publications

Naphthenic acids in oil sands process waters: Identification by conversion of the acids or esters to hydrocarbons

Naphthenic acids in oil sands process waters: Identification by conversion of the acids or esters to hydrocarbons

Geochemistry and origin of Ordovician oils in the Rewapu Block of the Halahatang Oilfield (NW China)

Geochemical Characteristics and Migration Pathways of Ordovician Carbonate Oil Reservoirs in the Tuoputai Area, Tarim Basin, Northwestern China

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