Aromatic hydrocarbons as parameters of oil formation conditions

2021 ◽  
pp. 10-14
Author(s):  
A.S. Javadova ◽  
Keyword(s):  
Mass Spectrometry ◽  
Source Rock ◽  
Aromatic Hydrocarbons ◽  
Thermal Maturity ◽  
Coastal Zones ◽  
Organic Facies ◽  
Distribution Character ◽  
Estimation Of Distribution ◽  
Formation Conditions ◽  
Oil Formation

Aromatic hydrocarbons in the oils of Absheron and Baku archipelago, as well as in coastal zones have been identified via the method of chromato-mass-spectrometry. Geochemical estimation of distribution character of main biomarkers and their correlations as well is presented. The similarity in the distribution of monoaromatic and triaromatic steroid hydrocarbons, as well as benzogopane and sekabenzogopans has been specified, which suggests that studied oils are associated with one source rock or organic facies. The varieties observed in the distribution of saturated steranes are most likely the result of differences in the values of thermal maturity or the processes of secondary alterations.

scholarly journals Palynofacies and Paleoenvironment investigation of the Hauterivian – Early Aptian Ratawi and Zubair formations, Balad oilfield, Central Iraq

2019 ◽  
Vol 24 (6) ◽  
pp. 74
Author(s):  
Adnan Q. Mahdi1 ◽  
Fawzi M. Al-Beyati2 ◽  
A. M. Al Tarif ◽  
El-Arabi H. Shendi4 ◽  
Mohamed I .Abdel-fattah4
Keyword(s):  
Source Rock ◽  
Marine Environment ◽  
Immature Stage ◽  
Mature Stage ◽  
Type Ii ◽  
Thermal Maturity ◽  
Observation Study ◽  
Organic Facies ◽  
Source Rock Evaluation ◽  
Oil Gas

This work depends on a detailed optical observation study of sedimentary organic facies from the Hauterivian – early Aptian Ratawi and Zubair formations from the Ba-1 well, Balad oilfield, Central Iraq. This study has manifested the advantages of palynofacies analysis methods for source rock evaluation of the studied formations, twenty five cutting rock samples organic facies data indicate a wide variation of source richness, quality and thermal maturity, the Ratawi Formation samples has the Type-II< I kerogen indicates marine environment in immature stage, while Zubair Formation has the Type-II<<  I kerogen (oil-gas prone) reflect the marine environment with  terrigenous influx in early mature to mature stage (early oil window).   http://dx.doi.org/10.25130/tjps.24.2019.111

A traceless clean-up method coupled with gas chromatography and mass spectrometry for analyzing polycyclic aromatic hydrocarbons in complex plant leaf matrices

The Analyst ◽  
2020 ◽  
Vol 145 (9) ◽  
pp. 3266-3273
Author(s):  
Xiangzi Jin ◽  
Han Yeong Kaw ◽  
Huijie Li ◽  
Zhao Wang ◽  
Jinhua Zhao ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
Solid Phase ◽  
Phase Extraction ◽  
Plant Leaves ◽  
Gas Purge ◽  
Polycyclic Aromatic

This study developed a traceless clean-up method by combining solid phase extraction (SPE) with gas purge–microsyringe extraction (GP–MSE) to purify sample extracts for the determination of polycyclic aromatic hydrocarbons (PAHs) in plant leaves.

Geochemical Characteristics of Crude Oils from the Tarim Basin by Fourier Transform Ion Cyclotron Resonance Mass Spectrometry

2011 ◽  
Vol 29 (6) ◽  
pp. 711-741 ◽  
Author(s):  
Sumei Li ◽  
Xiongqi Pang ◽  
Quan Shi ◽  
Baoshou Zhang ◽  
Haizu Zhang ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Fourier Transform ◽  
Cyclotron Resonance ◽  
Sulfur Compounds ◽  
Crude Oils ◽  
Ion Cyclotron Resonance ◽  
Thermal Maturity ◽  
Sulfur Species ◽  
Abnormal Distribution ◽  
Ion Cyclotron

Nine marine and two terrestrial oils from the Tarim Basin in Western China were analyzed by Fourier transform ion cyclotron resonance mass spectrometry. Sulfur compounds with 8–47 carbon atoms and double-bond equivalent (DBE) values of 0–21 are abundant in the crude oils. The most abundant sulfur species in Tazhong marine oils are S1 species (80.57–85.22%), followed by O1S1 (6.95–14.78%) and S2 (0.71–6.69%) species. The dominant species in Yingmaili terrestrial oils are S1 (51.41–52.76%), O1S1 (26.83–35.27%) and O2S1 (11.97–21.76%) species; no S2 species were detected. The results suggest that the sulfur compounds present in oil vary with the oil type. For the S1 and S2 species, as the thermal maturity increased, the degree of condensation increased, and the median and range of the number of carbon atoms decreased. Compounds with DBE values of 9, which are most likely dibenzothiophenes, became concentrated as the thermal maturity increased. Therefore, the unusually high abundance of dibenzothiophenes in the Lower Ordovician oils could be related to the thermal maturity. The TZ83 (O1) oil has an abnormal distribution of S1 species, and is characterized by sulfur species with relatively low DBE values (0–7). This abnormal distribution could be caused by thermochemical sulfate reduction, and a relatively high content of H2S in the associated gases and abundant sulfo-diamantane in the oil supported this theory. In conclusion, the thermal maturity, organic facies, paleoenvironment of the source rock, and possibly thermochemical sulfate reduction have a large impact on the sulfur compounds present in the oils. The O1S1/S1 and S2/S1 ratios could be used as indicators of the precursors/paleoenvironment, and C10–19/C20–50 DBE9 and DBE1,3,6 /DBE9 could be used as indicators of thermal maturity. Fourier transform ion cyclotron resonance mass spectrometry is very useful for detecting sulfur compounds, especially those with high molecular weights, in the crude oils. This technique has potential for determining the formation mechanisms of some unusual oils and the geochemical implications of the sulfur compounds they contain.

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