Distribution of triterpanes and steranes biomarkers as indication of organic matters input and depositional environments of crude oils of oilfields in Gulf of Suez, Egypt

El-Sabagh, S.M.; Elnaggar, Ashraf Y.; Nady, Mohamed M. El; Ebiad, Mohamed A.; Rashad, Ahmed; Abdullah, Eman S.

doi:10.1016/j.ejpe.2018.02.005

Cited by 18 publications

(19 citation statements)

References 22 publications

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“…2) except JKK7 and Jkk4 are generally from the bay or estuary and the open marine environments. The result of this study is not inconsistent with result recorded from the different area which was attributed all the reasons to the factors like the type of organic input which emphasizes on the C29 origin is not always coming from the land source (Pan et al 2008;El Sabagh et al 2018). The effect of hosted rock lithology and the percentages of clays within the rock, in addition to the age of hosted rock are also considered as factors that control the maturity levels of organic matter on the base of the estimated limit value of C29 which need more accuracy especially at oil generation window because they lead to misinterpretation or misunderstanding (Petersen et al 2005;Kara-Gülbay and Korkmaz, 2012).…”

Section: Sterane and Diasterans/ Regular Steranescontrasting

confidence: 42%

“…The result revealed the high value of C27 and C29 with low value of C28, this result reflects the effect of origin of organic input within a depositional environment which refer to algal rich organic matter like brown-green algae and no more land origin input (Fig. 2) with the anoxic environment (Pan et al 2008;Kara-Gülbay and Korkmaz, 2012;El-Sabagh et al 2018;and Ayyildiz et al 2019). Steranes consist of six subunits of isoprene, which are tetracyclic saturated biomarkers.…”

Section: Sterane and Diasterans/ Regular Steranesmentioning

confidence: 81%

“…The usefulness of steranes biomarkers as indicators of depositional environments, maturity, and the age of hosted rocks are vital (Pan et al 2008;Martinelli, 2009;El-Sabagh et al 2018;Al-Atroshi et al 2020). The result revealed the high value of C27 and C29 with low value of C28, this result reflects the effect of origin of organic input within a depositional environment which refer to algal rich organic matter like brown-green algae and no more land origin input (Fig.…”

Section: Sterane and Diasterans/ Regular Steranesmentioning

confidence: 92%

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Distribution of Steranes and Triterpanes Biomarkersas Indication of Depositional Environment and Maturity of Sargelu and Kurrachine Formations in Different Wells Northern Iraq

Al-Dolaimy

Al-Beyati

Al-Mallah

2021

IGJ

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Eight cuttings samples were obtained from Sargelu and Kurrachine formations in different wells at different depths to detect steranes and triterpanes biomarkers as an indicator of the depositional environments and thermal maturity of organic matter. This was accomplished using GC-MS technology. The diasterane/sterane ratio showed low ratios in analyzed samples (BJS2, JKS3, BJK1, JKK4, JKK7) as in most marine carbonate sources, while algal-bacterial organic matter contribution for the samples analyzed based on the predominance of C23 tricyclic relative to the C19 tricyclic terpene and the C23 tricyclic greater than C24 tricyclic terpane. The Gammacerane index indicated that normal salinity conditions during depositions. The biomarkers related to maturation such as diasterane/sterane, Ts/(Ts+Tm), and C29Ts/C29 hopane show that the organic matter in Ain Zalah well (Sargelu Formation) is within early mature (oil window).

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Section: Sterane and Diasterans/ Regular Steranescontrasting

confidence: 42%

Section: Sterane and Diasterans/ Regular Steranesmentioning

confidence: 81%

Section: Sterane and Diasterans/ Regular Steranesmentioning

confidence: 92%

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Distribution of Steranes and Triterpanes Biomarkersas Indication of Depositional Environment and Maturity of Sargelu and Kurrachine Formations in Different Wells Northern Iraq

Al-Dolaimy

Al-Beyati

Al-Mallah

2021

IGJ

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“…Traditional methods of petroleum fingerprinting rely on petroleum biomarkers, organic molecules that are highly conserved and representative of the geographical origins and genesis of each oil sample (Radovic et al 2012). The presence of petroleum biomarkers, such as steranes ( m/z 217) and triterpanes ( m/z 191), indicates historical geological organic matter and deposits in crude oil; these molecules are the most useful geological information for forensic fingerprinting (El‐Sabagh et al 2018). Oil sample biomarker data were available for 15 of 19 crude oil samples included in the present study; for samples from Texas and Louisiana, regular steranes and triterpanes were below detection limit (Supplemental Data, Tables 3–6).…”

Section: Resultsmentioning

confidence: 99%

A Comparative Analysis of Analytical Techniques for Rapid Oil Spill Identification

Roman-Hubers

McDonald

Baker

et al. 2021

Enviro Toxic and Chemistry

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The complex chemical composition of crude oils presents many challenges for rapid chemical characterization in the case of a spill. A number of approaches are currently used to "fingerprint" petroleum-derived samples. Gas chromatography coupled with mass spectrometry (GC-MS) is the most common, albeit not very rapid, technique; however, with GC-MS alone, it is difficult to resolve the complex substances in crude oils. The present study examined the potential application of ion mobility spectrometry-mass spectrometry (IMS-MS) coupled with chem-informatic analyses as an alternative high-throughput method for the chemical characterization of crude oils. We analyzed 19 crude oil samples from onand offshore locations in the Gulf of Mexico region in the United States using both GC-MS (biomarkers, gasoline range hydrocarbons, and n-alkanes) and IMS-MS (untargeted analysis). Hierarchical clustering, principal component analysis, and nearest neighbor-based classification were used to examine sample similarity and geographical groupings. We found that direct-injection IMS-MS performed either equally or better than GC-MS in the classification of the origins of crude oils. In addition, IMS-MS greatly increased the sample analysis throughput (minutes vs hours per sample). Finally, a tabletop scienceto-practice exercise, utilizing both the GC-MS and IMS-MS data, was conducted with emergency response experts from regulatory agencies and the oil industry. This activity showed that the stakeholders found the IMS-MS data to be highly informative for rapid chemical fingerprinting of complex substances in general and specifically advantageous for accurate and confident source-grouping of crude oils. Collectively, the present study shows the utility of IMS-MS as a technique for rapid fingerprinting of complex samples and demonstrates its advantages over traditional GC-MS-based analyses when used for decision-making in emergency situations.

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“…Gam/Hop ratio is detected in relatively low amount in the studied oil samples indicating input of marine organic matter (Rousdy et al, 2010). The ratio can be also denoted the salinity variation of depositional environment (Grantham et al, 1983, El-Sabagh et al, 2018 indicating a decreasing trend from east to west of the field. This ratio was also used to interpret oil maturity (Roushdy et al, 2010) due to its sensitivity to oil source rock.…”

Section: Age Of Source Rockmentioning

confidence: 99%

Controlling Factors on Unusual Oil Composition Distribution in Bangestan Reservoir, Dezful Embayment, Sw Iran

2020

GiG

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Petroleum geochemical characteristics are a major parameter of hydrocarbon field development. The present study is an attempt to decipher unusual Bangestan (Cretaceous age) oil distribution throughout the Ahvaz oil field, SW Iran based on SARA test, and GC-MS analysis of selected oil samples. The results indicated that all analysed oils are ascribed to paraffinic group. Hydrocarbon indicators such as triterpane tricyclic C 22 /C 21 (high), C 24 /C 23 , and C 26 /C 25 (low) and C 31 R/C 30 Hopane (high), and C 25 /C 26 ratio vs C 25 /C 26 tet ratio presented that these oils sourced from carbonate-marl rocks. High saturation/aromatic ratio in these oil samples may be related to long migration or high maturity. Biomarker variation exhibits a marine environment for the source rocks deposition. The observed oil maturity trend is showing a well correlation with the prevailing geothermal gradient and possible basement faults and fractured system. Increasing oil maturity in the eastern part of the field may be referred to a heat flow anomaly. It seems the area around well-C location (the area of wells no. C, D, or E) can be considered to be a petrochemical separator of fluids for two sides of the field. Therefore, it can be concluded that the observed petrochemical pattern is a complicated response of several factors such as the presence of palaeohigh, basement controlled faults, petroleum source rocks, fracture system and geothermal gradient variation in this deep reservoir.

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Distribution of triterpanes and steranes biomarkers as indication of organic matters input and depositional environments of crude oils of oilfields in Gulf of Suez, Egypt

Cited by 18 publications

References 22 publications

Distribution of Steranes and Triterpanes Biomarkersas Indication of Depositional Environment and Maturity of Sargelu and Kurrachine Formations in Different Wells Northern Iraq

Distribution of Steranes and Triterpanes Biomarkersas Indication of Depositional Environment and Maturity of Sargelu and Kurrachine Formations in Different Wells Northern Iraq

A Comparative Analysis of Analytical Techniques for Rapid Oil Spill Identification

Controlling Factors on Unusual Oil Composition Distribution in Bangestan Reservoir, Dezful Embayment, Sw Iran

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