TY  - JOUR
AU  - Saheed, Ramadan Musbah M.
AU  - Knudsen, Tatjana Šolević
AU  - Faraj, Musbah Abduljalil M.
AU  - Nytoft, Hans Peter
AU  - Jovančićević, Branimir
PY  - 2023
UR  - http://cherry.chem.bg.ac.rs/handle/123456789/5795
AB  - Crude oil samples from the Sharara-C oil field (Concession NC-115, Murzuq Basin, SW Libya) were analysed by organic geochemical methods in order to infer the geochemical characteristics of their respective source rocks. Aromatic hydrocarbons were analysed by gas chromatography – mass spectrometry (GC-MS), and gas chromatography – tandem mass spectrometry (GC-MS-MS) was used to analyse saturated biomarkers. The Sharara-C oils are interpreted to have been generated by marine shales containing mixed terrigenous and marine organic materials deposited in an intermediate (suboxic) environment. Age-specific biomarker ratios indicated that the oils are older than Cretaceous, and maturation-related parameters pointed to their high thermal maturity. Consistent with previous studies, source rocks are inferred to be “hot” shales in the Lower Silurian Tanezzuft Formation. Almost all the parameter ratios calculated varied over a very narrow range, indicating that the investigated oils were compositionally similar. The only significant difference that was noted concerned the sterane/hopane ratios whose variation suggested that there was some variability in the composition of the source organic material. The organic geochemical parameters determined for the Sharara-C crude oils were compared with published data on other crude oils from Concession NC-115. Almost all the parameters agreed well with previously published data on oils from this part of the Murzuq Basin. The greatest deviation concerned the values of some of the maturity parameters. This tended to confirm the conclusions of previous studies concerning the presence of a number of distinct oil families and sub-families in the Sharara oil field area which are genetically related but which have different maturities.
T2  - Journal of Petroleum Geology
T1  - Geochemical Characteristics of Crude Oils from the Sharara-C Oil Field, Murzuq Basin, Southwestern Libya
VL  - 46
IS  - 1
SP  - 103
EP  - 123
DO  - 10.1111/jpg.12832
ER  - 

@article{
author = "Saheed, Ramadan Musbah M. and Knudsen, Tatjana Šolević and Faraj, Musbah Abduljalil M. and Nytoft, Hans Peter and Jovančićević, Branimir",
year = "2023",
abstract = "Crude oil samples from the Sharara-C oil field (Concession NC-115, Murzuq Basin, SW Libya) were analysed by organic geochemical methods in order to infer the geochemical characteristics of their respective source rocks. Aromatic hydrocarbons were analysed by gas chromatography – mass spectrometry (GC-MS), and gas chromatography – tandem mass spectrometry (GC-MS-MS) was used to analyse saturated biomarkers. The Sharara-C oils are interpreted to have been generated by marine shales containing mixed terrigenous and marine organic materials deposited in an intermediate (suboxic) environment. Age-specific biomarker ratios indicated that the oils are older than Cretaceous, and maturation-related parameters pointed to their high thermal maturity. Consistent with previous studies, source rocks are inferred to be “hot” shales in the Lower Silurian Tanezzuft Formation. Almost all the parameter ratios calculated varied over a very narrow range, indicating that the investigated oils were compositionally similar. The only significant difference that was noted concerned the sterane/hopane ratios whose variation suggested that there was some variability in the composition of the source organic material. The organic geochemical parameters determined for the Sharara-C crude oils were compared with published data on other crude oils from Concession NC-115. Almost all the parameters agreed well with previously published data on oils from this part of the Murzuq Basin. The greatest deviation concerned the values of some of the maturity parameters. This tended to confirm the conclusions of previous studies concerning the presence of a number of distinct oil families and sub-families in the Sharara oil field area which are genetically related but which have different maturities.",
journal = "Journal of Petroleum Geology",
title = "Geochemical Characteristics of Crude Oils from the Sharara-C Oil Field, Murzuq Basin, Southwestern Libya",
volume = "46",
number = "1",
pages = "103-123",
doi = "10.1111/jpg.12832"
}

Saheed, R. M. M., Knudsen, T. Š., Faraj, M. A. M., Nytoft, H. P.,& Jovančićević, B.. (2023). Geochemical Characteristics of Crude Oils from the Sharara-C Oil Field, Murzuq Basin, Southwestern Libya. in Journal of Petroleum Geology, 46(1), 103-123.
https://doi.org/10.1111/jpg.12832

Saheed RMM, Knudsen TŠ, Faraj MAM, Nytoft HP, Jovančićević B. Geochemical Characteristics of Crude Oils from the Sharara-C Oil Field, Murzuq Basin, Southwestern Libya. in Journal of Petroleum Geology. 2023;46(1):103-123.
doi:10.1111/jpg.12832 .

Saheed, Ramadan Musbah M., Knudsen, Tatjana Šolević, Faraj, Musbah Abduljalil M., Nytoft, Hans Peter, Jovančićević, Branimir, "Geochemical Characteristics of Crude Oils from the Sharara-C Oil Field, Murzuq Basin, Southwestern Libya" in Journal of Petroleum Geology, 46, no. 1 (2023):103-123,
https://doi.org/10.1111/jpg.12832 . .

TY  - JOUR
AU  - Saheed, Ramadan Musbah M.
AU  - Šolević-Knudsen, Tatjana
AU  - Faraj, Musbah Abduljalil M.
AU  - Nikolovski, Zlatko
AU  - Nytoft, Hans Peter
AU  - Jovančićević, Branimir
PY  - 2020
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/4303
AB  - Seven crude oils from four oil fields in the Sirte and Murzuq Basins in Libya were investigated in order to estimate their organic geochemical homogeneity. Saturated biomarkers (n-alkanes and isoprenoids) were analyzed using gas chromatography–mass spectrometry (GC–MS). The parameters calculated from the distributions of n-alkanes and isoprenoid aliphatic alkanes, pristane and phytane were used to interpret the organic geochemical characteristics of the oils. Based on the high relative concentration of lower n-alkane homologues in the C11–C16 range and high API values, the oils were classified as light oils. These results also implied that the oils were not biodegraded. The parameters calculated from the distributions of saturated biomarkers indicated that all investigated oils were generated from source rocks containing organic matter of a similar marine origin but with a contribution of terrestrial organic matter. The results also demonstrated that these source rocks were deposited in an oxic environment. The same source rock or the same type of source rocks for all seven samples were postulated. It was concluded that, if the crude oils from these distant basins originated from the same source rocks, they must have had different lengths of their migration pathways.
T2  - Journal of the Serbian Chemical Society
T1  - Saturated biomarkers in the estimation of organic geochemical homogeneity of crude oils from four oil fields in Libya
VL  - 85
IS  - 11
SP  - 1489
EP  - 1499
DO  - 10.2298/JSC200501055S
ER  - 

@article{
author = "Saheed, Ramadan Musbah M. and Šolević-Knudsen, Tatjana and Faraj, Musbah Abduljalil M. and Nikolovski, Zlatko and Nytoft, Hans Peter and Jovančićević, Branimir",
year = "2020",
abstract = "Seven crude oils from four oil fields in the Sirte and Murzuq Basins in Libya were investigated in order to estimate their organic geochemical homogeneity. Saturated biomarkers (n-alkanes and isoprenoids) were analyzed using gas chromatography–mass spectrometry (GC–MS). The parameters calculated from the distributions of n-alkanes and isoprenoid aliphatic alkanes, pristane and phytane were used to interpret the organic geochemical characteristics of the oils. Based on the high relative concentration of lower n-alkane homologues in the C11–C16 range and high API values, the oils were classified as light oils. These results also implied that the oils were not biodegraded. The parameters calculated from the distributions of saturated biomarkers indicated that all investigated oils were generated from source rocks containing organic matter of a similar marine origin but with a contribution of terrestrial organic matter. The results also demonstrated that these source rocks were deposited in an oxic environment. The same source rock or the same type of source rocks for all seven samples were postulated. It was concluded that, if the crude oils from these distant basins originated from the same source rocks, they must have had different lengths of their migration pathways.",
journal = "Journal of the Serbian Chemical Society",
title = "Saturated biomarkers in the estimation of organic geochemical homogeneity of crude oils from four oil fields in Libya",
volume = "85",
number = "11",
pages = "1489-1499",
doi = "10.2298/JSC200501055S"
}

Saheed, R. M. M., Šolević-Knudsen, T., Faraj, M. A. M., Nikolovski, Z., Nytoft, H. P.,& Jovančićević, B.. (2020). Saturated biomarkers in the estimation of organic geochemical homogeneity of crude oils from four oil fields in Libya. in Journal of the Serbian Chemical Society, 85(11), 1489-1499.
https://doi.org/10.2298/JSC200501055S

Saheed RMM, Šolević-Knudsen T, Faraj MAM, Nikolovski Z, Nytoft HP, Jovančićević B. Saturated biomarkers in the estimation of organic geochemical homogeneity of crude oils from four oil fields in Libya. in Journal of the Serbian Chemical Society. 2020;85(11):1489-1499.
doi:10.2298/JSC200501055S .

Saheed, Ramadan Musbah M., Šolević-Knudsen, Tatjana, Faraj, Musbah Abduljalil M., Nikolovski, Zlatko, Nytoft, Hans Peter, Jovančićević, Branimir, "Saturated biomarkers in the estimation of organic geochemical homogeneity of crude oils from four oil fields in Libya" in Journal of the Serbian Chemical Society, 85, no. 11 (2020):1489-1499,
https://doi.org/10.2298/JSC200501055S . .

TY  - THES
AU  - Faraj, Musbah Abduljalil M.
PY  - 2017
UR  - http://eteze.bg.ac.rs/application/showtheses?thesesId=5600
UR  - https://fedorabg.bg.ac.rs/fedora/get/o:17120/bdef:Content/download
UR  - http://vbs.rs/scripts/cobiss?command=DISPLAY&base=70036&RID=49839631
UR  - http://nardus.mpn.gov.rs/123456789/9179
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/2750
AB  - Ova doktorska disertacija sastoji se od dve jasno definisane celine.U prvom delu ove teze vrednosti parametara izračunatih na osnovu raspodela i obilnostiodabranih pentacikličnih terpana u sirovim naftama iz Libije i Srbije, koji su originalno dobijeniiz rezultata gasno hromatografsko – maseno spektrometrijske (GC-MS) analize upoređene su sakvantifikacionim rezultatima koji su zasnovani na gasno hromatografsko – masenospektrometrijsko – maseno spektrometrijskoj (GC-MS-MS) analizi. Analizirani parametri sunajčešće korišćeni terpanski izvorni i maturacioni parametri, koji su primenjeni na veliku grupuuzoraka od 70 sirovih nafti, koje potiču iz pet naftnih polja. Cilj je bio da se ispita u kojoj meri semerenja odabranih parametara ovim dvema tehnikama slažu i da se odredi uticaj razlika izmeđuvrednosti ovih parametara na geohemijsku interpretaciju. U tom cilju, korišćene su dvestatističke metode: koeficijent slaganja korelacija i dijagram srednja vrednost-razlika. Dobijenirezultati pokazuju da izračunavanje C2718α(H)-22,29,30-trisnorneohopan/(C2718α(H)-22,29,30-trisnorneohopan + C2717α(H)-22,29,30- trisnorhopan), C2918α(H)-30-norneohopan/C2917α(H)21β(H)-30-norhopan i C2917α(H)21β(H)-30- norhopan/C3017α(H)21β(H)- hopan odnosa bilo GC-MS ili GC-MS-MS tehnikom ne utiče značajno nainterpretaciju. S druge strane, određivanje C3017β(H)21α(H)-moretan/C3017α(H)21β(H)-hopanodnosa, gamaceranskog indeksa i oleananskog indeksa GC-MS ili GC-MS-MS tehnikom možeznačajno uticati na interpretaciju. Ove razlike se mogu objasniti koeluiranjem i preklapanjempikova tokom GC-MS analize ali takođe i boljim razdvajanjem, većom preciznošću i boljomselektivnošću GC-MS-MS tehnike. Odstupanje skoro svih parametara od linije jednakosti jeslično za nafte iz istog naftnog polja ali su uočene razlike pri analizi nafti iz različitih naftnihpolja. Stoga, kada se planira primena GC-MS-MS rezultata u organsko geohemijskiminterpretacijama, preporučuje se i regionalna kalibracija odnosa između GC-MS i GC-MS-MS rezultata za svaki naftni sistem...
AB  - This thesis consists of two dinstictive parts.In the first part of this thesis the values of parameters calculated from distributions andabundances of selected pentacyclic terpanes in crude oils from Libya and Serbia, which wereoriginally derived from gas chromatography-mass spectrometry (GC-MS) were compared withquantification results based on gas chromatography-mass spectrometry-mass spectrometry (GCMS-MS). The parameters analyzed are the most often used terpane source and maturityparameters, which were applied to a large sample set of 70 oils, originating from five oil fields.The aim of the paper was to investigate to which extent the measurements of the selectedparameters by these two instrumental techniques agree and to determine influence of differencesbetween parameter values on geochemical interpretation. For that purpose two methods,concordance correlation coefficient and mean-difference plot were used. The obtained resultsindicate that calculation of C2718α(H)-22,29,30-trisnorneohopane/(C2718α(H)-22,29,30-trisnorneohopane + C2717α(H)-22,29,30-trisnorhopane), C2918α(H)-30-norneohopane/C2917α(H)21β(H)-30-norhopane and C2917α(H)21β(H)-30-norhopane/C3017α(H)21β(H)-hopane ratios either by GC-MS or GC-MS-MS do notsignificantly influence interpretation. On the other hand, determination of C3017β(H)21α(H)-moretane/C3017α(H)21β(H)- -hopane ratio, gammacerane index and oleanane index by GC-MSvs. GC-MS-MS could notably affect interpretation. These differences can be explained by coelutionand peak overlapping in GC-MS but also by better separation, higher precision and betterselectivity of the GC-MS-MS. Deviation of the almost all studied parameters from the line ofequality was similar for the oils from the same oil field but some differences were observed forthe oils from different oil fields. Therefore, when GC-MS-MS results are to be used in organicgeochemical interpretations, a regional calibration of GC-MS vs. GC-MS-MS relationship foreach petroleum system is highly recommended...
PB  - Универзитет у Београду, Хемијски факултет
T2  - Универзитет у Београду
T1  - Organic-geochemical characterization and correlation of crude oils samples from the most significant oil fields in the Sirte basin, Lybia
UR  - https://hdl.handle.net/21.15107/rcub_nardus_9179
ER  - 

@phdthesis{
author = "Faraj, Musbah Abduljalil M.",
year = "2017",
abstract = "Ova doktorska disertacija sastoji se od dve jasno definisane celine.U prvom delu ove teze vrednosti parametara izračunatih na osnovu raspodela i obilnostiodabranih pentacikličnih terpana u sirovim naftama iz Libije i Srbije, koji su originalno dobijeniiz rezultata gasno hromatografsko – maseno spektrometrijske (GC-MS) analize upoređene su sakvantifikacionim rezultatima koji su zasnovani na gasno hromatografsko – masenospektrometrijsko – maseno spektrometrijskoj (GC-MS-MS) analizi. Analizirani parametri sunajčešće korišćeni terpanski izvorni i maturacioni parametri, koji su primenjeni na veliku grupuuzoraka od 70 sirovih nafti, koje potiču iz pet naftnih polja. Cilj je bio da se ispita u kojoj meri semerenja odabranih parametara ovim dvema tehnikama slažu i da se odredi uticaj razlika izmeđuvrednosti ovih parametara na geohemijsku interpretaciju. U tom cilju, korišćene su dvestatističke metode: koeficijent slaganja korelacija i dijagram srednja vrednost-razlika. Dobijenirezultati pokazuju da izračunavanje C2718α(H)-22,29,30-trisnorneohopan/(C2718α(H)-22,29,30-trisnorneohopan + C2717α(H)-22,29,30- trisnorhopan), C2918α(H)-30-norneohopan/C2917α(H)21β(H)-30-norhopan i C2917α(H)21β(H)-30- norhopan/C3017α(H)21β(H)- hopan odnosa bilo GC-MS ili GC-MS-MS tehnikom ne utiče značajno nainterpretaciju. S druge strane, određivanje C3017β(H)21α(H)-moretan/C3017α(H)21β(H)-hopanodnosa, gamaceranskog indeksa i oleananskog indeksa GC-MS ili GC-MS-MS tehnikom možeznačajno uticati na interpretaciju. Ove razlike se mogu objasniti koeluiranjem i preklapanjempikova tokom GC-MS analize ali takođe i boljim razdvajanjem, većom preciznošću i boljomselektivnošću GC-MS-MS tehnike. Odstupanje skoro svih parametara od linije jednakosti jeslično za nafte iz istog naftnog polja ali su uočene razlike pri analizi nafti iz različitih naftnihpolja. Stoga, kada se planira primena GC-MS-MS rezultata u organsko geohemijskiminterpretacijama, preporučuje se i regionalna kalibracija odnosa između GC-MS i GC-MS-MS rezultata za svaki naftni sistem..., This thesis consists of two dinstictive parts.In the first part of this thesis the values of parameters calculated from distributions andabundances of selected pentacyclic terpanes in crude oils from Libya and Serbia, which wereoriginally derived from gas chromatography-mass spectrometry (GC-MS) were compared withquantification results based on gas chromatography-mass spectrometry-mass spectrometry (GCMS-MS). The parameters analyzed are the most often used terpane source and maturityparameters, which were applied to a large sample set of 70 oils, originating from five oil fields.The aim of the paper was to investigate to which extent the measurements of the selectedparameters by these two instrumental techniques agree and to determine influence of differencesbetween parameter values on geochemical interpretation. For that purpose two methods,concordance correlation coefficient and mean-difference plot were used. The obtained resultsindicate that calculation of C2718α(H)-22,29,30-trisnorneohopane/(C2718α(H)-22,29,30-trisnorneohopane + C2717α(H)-22,29,30-trisnorhopane), C2918α(H)-30-norneohopane/C2917α(H)21β(H)-30-norhopane and C2917α(H)21β(H)-30-norhopane/C3017α(H)21β(H)-hopane ratios either by GC-MS or GC-MS-MS do notsignificantly influence interpretation. On the other hand, determination of C3017β(H)21α(H)-moretane/C3017α(H)21β(H)- -hopane ratio, gammacerane index and oleanane index by GC-MSvs. GC-MS-MS could notably affect interpretation. These differences can be explained by coelutionand peak overlapping in GC-MS but also by better separation, higher precision and betterselectivity of the GC-MS-MS. Deviation of the almost all studied parameters from the line ofequality was similar for the oils from the same oil field but some differences were observed forthe oils from different oil fields. Therefore, when GC-MS-MS results are to be used in organicgeochemical interpretations, a regional calibration of GC-MS vs. GC-MS-MS relationship foreach petroleum system is highly recommended...",
publisher = "Универзитет у Београду, Хемијски факултет",
journal = "Универзитет у Београду",
title = "Organic-geochemical characterization and correlation of crude oils samples from the most significant oil fields in the Sirte basin, Lybia",
url = "https://hdl.handle.net/21.15107/rcub_nardus_9179"
}

Faraj, M. A. M.. (2017). Organic-geochemical characterization and correlation of crude oils samples from the most significant oil fields in the Sirte basin, Lybia. in Универзитет у Београду
Универзитет у Београду, Хемијски факултет..
https://hdl.handle.net/21.15107/rcub_nardus_9179

Faraj MAM. Organic-geochemical characterization and correlation of crude oils samples from the most significant oil fields in the Sirte basin, Lybia. in Универзитет у Београду. 2017;.
https://hdl.handle.net/21.15107/rcub_nardus_9179 .

Faraj, Musbah Abduljalil M., "Organic-geochemical characterization and correlation of crude oils samples from the most significant oil fields in the Sirte basin, Lybia" in Универзитет у Београду (2017),
https://hdl.handle.net/21.15107/rcub_nardus_9179 .

TY  - JOUR
AU  - Faraj, Musbah Abduljalil M.
AU  - Šolević-Knudsen, Tatjana
AU  - Stojanović, Ksenija A.
AU  - Pavlović-Ivković, Sonja
AU  - Nytoft, Hans Peter
AU  - Jovančićević, Branimir
PY  - 2017
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/2567
AB  - The values of parameters calculated from distribution and abundance of the selected pentacyclic terpanes in crude oils from Libya and Serbia, which were originally derived from gas chromatography-mass spectrometry (GC-MS) were compared with results of quantification based on gas chromatography-mass spectrometry-mass spectrometry (GC-MS-MS). The parameters analyzed are the most often used terpane source and maturity parameters, which were applied to a large sample set of 70 oils, originating from five oil fields. The aim of the paper was to investigate to which extent the measurements of the selected parameters by these two instrumental techniques agree and to determine the influence of differences between parameter values on geochemical interpretation. For that purpose two methods, concordance correlation coefficient and mean-difference plot were used. The obtained results indicate that calculation of C(27)18 alpha(H)-22,29,30-trisnorneohopane/(C(27)18 alpha(H)-22,29,30-trisnorneohopane +C(27)17 alpha(H)-22,29,30-trisnorhopane), C(29)18 alpha(H)-30-norneohopane/C(29)17 alpha(H) 21 beta(H)-30-norhopane and C(29)17 alpha(H)21 beta(H)-30-norhopane/ C(30)17 alpha(H)21 beta(H)-hopane ratios either by GC-MS or GC-MS-MS do not significantly influence interpretation. On the other hand, the determination of C(30)17 beta(H)21 alpha(H)-moretane/C(30)17 alpha(H)21 beta(H)-hopane ratio, gammacerane index and oleanane index by GC-MS vs. GC-MS-MS could notably affect interpretation. These differences can be explained by the co-elution and the peak overlapping in GC-MS but also by better separation, higher precision and better selectivity of the GC-MS-MS. Deviation of the almost all studied parameters from the line of equality was similar for the oils from the same oil field but some differences were observed for the oils from different oil fields. Therefore, when GC-MS-MS results are to be used in organic geochemical interpretations, a regional calibration of GC-MS vs. GC-MS-MS relationship for each petroleum system is highly recommended.
PB  - Serbian Chemical Soc, Belgrade
T2  - Journal of the Serbian Chemical Society
T1  - GC-MS vs. GC-MS-MS analysis of pentacyclic terpanes in crude oils from Libya and Serbia - A comparison of two methods
VL  - 82
IS  - 11
SP  - 1315
EP  - 1331
DO  - 10.2298/JSC170419075A
ER  - 

@article{
author = "Faraj, Musbah Abduljalil M. and Šolević-Knudsen, Tatjana and Stojanović, Ksenija A. and Pavlović-Ivković, Sonja and Nytoft, Hans Peter and Jovančićević, Branimir",
year = "2017",
abstract = "The values of parameters calculated from distribution and abundance of the selected pentacyclic terpanes in crude oils from Libya and Serbia, which were originally derived from gas chromatography-mass spectrometry (GC-MS) were compared with results of quantification based on gas chromatography-mass spectrometry-mass spectrometry (GC-MS-MS). The parameters analyzed are the most often used terpane source and maturity parameters, which were applied to a large sample set of 70 oils, originating from five oil fields. The aim of the paper was to investigate to which extent the measurements of the selected parameters by these two instrumental techniques agree and to determine the influence of differences between parameter values on geochemical interpretation. For that purpose two methods, concordance correlation coefficient and mean-difference plot were used. The obtained results indicate that calculation of C(27)18 alpha(H)-22,29,30-trisnorneohopane/(C(27)18 alpha(H)-22,29,30-trisnorneohopane +C(27)17 alpha(H)-22,29,30-trisnorhopane), C(29)18 alpha(H)-30-norneohopane/C(29)17 alpha(H) 21 beta(H)-30-norhopane and C(29)17 alpha(H)21 beta(H)-30-norhopane/ C(30)17 alpha(H)21 beta(H)-hopane ratios either by GC-MS or GC-MS-MS do not significantly influence interpretation. On the other hand, the determination of C(30)17 beta(H)21 alpha(H)-moretane/C(30)17 alpha(H)21 beta(H)-hopane ratio, gammacerane index and oleanane index by GC-MS vs. GC-MS-MS could notably affect interpretation. These differences can be explained by the co-elution and the peak overlapping in GC-MS but also by better separation, higher precision and better selectivity of the GC-MS-MS. Deviation of the almost all studied parameters from the line of equality was similar for the oils from the same oil field but some differences were observed for the oils from different oil fields. Therefore, when GC-MS-MS results are to be used in organic geochemical interpretations, a regional calibration of GC-MS vs. GC-MS-MS relationship for each petroleum system is highly recommended.",
publisher = "Serbian Chemical Soc, Belgrade",
journal = "Journal of the Serbian Chemical Society",
title = "GC-MS vs. GC-MS-MS analysis of pentacyclic terpanes in crude oils from Libya and Serbia - A comparison of two methods",
volume = "82",
number = "11",
pages = "1315-1331",
doi = "10.2298/JSC170419075A"
}

Faraj, M. A. M., Šolević-Knudsen, T., Stojanović, K. A., Pavlović-Ivković, S., Nytoft, H. P.,& Jovančićević, B.. (2017). GC-MS vs. GC-MS-MS analysis of pentacyclic terpanes in crude oils from Libya and Serbia - A comparison of two methods. in Journal of the Serbian Chemical Society
Serbian Chemical Soc, Belgrade., 82(11), 1315-1331.
https://doi.org/10.2298/JSC170419075A

Faraj MAM, Šolević-Knudsen T, Stojanović KA, Pavlović-Ivković S, Nytoft HP, Jovančićević B. GC-MS vs. GC-MS-MS analysis of pentacyclic terpanes in crude oils from Libya and Serbia - A comparison of two methods. in Journal of the Serbian Chemical Society. 2017;82(11):1315-1331.
doi:10.2298/JSC170419075A .

Faraj, Musbah Abduljalil M., Šolević-Knudsen, Tatjana, Stojanović, Ksenija A., Pavlović-Ivković, Sonja, Nytoft, Hans Peter, Jovančićević, Branimir, "GC-MS vs. GC-MS-MS analysis of pentacyclic terpanes in crude oils from Libya and Serbia - A comparison of two methods" in Journal of the Serbian Chemical Society, 82, no. 11 (2017):1315-1331,
https://doi.org/10.2298/JSC170419075A . .

TY  - JOUR
AU  - Faraj, Musbah Abduljalil M.
AU  - Šolević-Knudsen, Tatjana
AU  - Nytoft, Hans Peter
AU  - Jovančićević, Branimir
PY  - 2016
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/2355
AB  - Four crude oil samples from the oil fields Intisar A, Intisar D and Intisar E (Sirte Basin, Libya) were investigated in order to define depositional environment, lithology, thermal maturity and geologic age of the corresponding source rocks. Saturated biomarkers (n-alkanes, isoprenoids, steranes and triterpanes) were determined using gas chromatography - mass spectrometry (GC MS) and gas chromatography mass spectrometry - mass spectrometry (GC MS MS). Aromatic hydrocarbons (phenanthrene, methylphenanthrenes, methyl-dibenzothiophenes and trimethyl-naphtalenes) were analyzed by GC-MS. The Intisar crude oils were generated from siliciclastic source rocks containing a mixture of marine and terrestrial organic matter. Maturation parameters indicated high level of thermal maturity corresponding to the main phase of oil generation. The analysis of the age-specific biomarker ratios suggested Cretaceous, most probably Lower Cretaceous age for the Intisar oils. Two source rocks for the Intisar oils were identified, similar in the precursor organic matter type, lithology, maturity and geologic age but different in the redox conditions in the environment during their deposition. The oils generated from these different sources probably migrated over different migration pathways. (C) 2016 Elsevier B.V. All rights reserved.
PB  - Elsevier Science Bv, Amsterdam
T2  - Journal of Petroleum Science and Engineering
T1  - Organic geochemistry of crude oils from the Intisar oil field (East Sirte Basin, Libya)
VL  - 147
SP  - 605
EP  - 616
DO  - 10.1016/j.petrol.2016.09.030
ER  - 

@article{
author = "Faraj, Musbah Abduljalil M. and Šolević-Knudsen, Tatjana and Nytoft, Hans Peter and Jovančićević, Branimir",
year = "2016",
abstract = "Four crude oil samples from the oil fields Intisar A, Intisar D and Intisar E (Sirte Basin, Libya) were investigated in order to define depositional environment, lithology, thermal maturity and geologic age of the corresponding source rocks. Saturated biomarkers (n-alkanes, isoprenoids, steranes and triterpanes) were determined using gas chromatography - mass spectrometry (GC MS) and gas chromatography mass spectrometry - mass spectrometry (GC MS MS). Aromatic hydrocarbons (phenanthrene, methylphenanthrenes, methyl-dibenzothiophenes and trimethyl-naphtalenes) were analyzed by GC-MS. The Intisar crude oils were generated from siliciclastic source rocks containing a mixture of marine and terrestrial organic matter. Maturation parameters indicated high level of thermal maturity corresponding to the main phase of oil generation. The analysis of the age-specific biomarker ratios suggested Cretaceous, most probably Lower Cretaceous age for the Intisar oils. Two source rocks for the Intisar oils were identified, similar in the precursor organic matter type, lithology, maturity and geologic age but different in the redox conditions in the environment during their deposition. The oils generated from these different sources probably migrated over different migration pathways. (C) 2016 Elsevier B.V. All rights reserved.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Journal of Petroleum Science and Engineering",
title = "Organic geochemistry of crude oils from the Intisar oil field (East Sirte Basin, Libya)",
volume = "147",
pages = "605-616",
doi = "10.1016/j.petrol.2016.09.030"
}

Faraj, M. A. M., Šolević-Knudsen, T., Nytoft, H. P.,& Jovančićević, B.. (2016). Organic geochemistry of crude oils from the Intisar oil field (East Sirte Basin, Libya). in Journal of Petroleum Science and Engineering
Elsevier Science Bv, Amsterdam., 147, 605-616.
https://doi.org/10.1016/j.petrol.2016.09.030

Faraj MAM, Šolević-Knudsen T, Nytoft HP, Jovančićević B. Organic geochemistry of crude oils from the Intisar oil field (East Sirte Basin, Libya). in Journal of Petroleum Science and Engineering. 2016;147:605-616.
doi:10.1016/j.petrol.2016.09.030 .

Faraj, Musbah Abduljalil M., Šolević-Knudsen, Tatjana, Nytoft, Hans Peter, Jovančićević, Branimir, "Organic geochemistry of crude oils from the Intisar oil field (East Sirte Basin, Libya)" in Journal of Petroleum Science and Engineering, 147 (2016):605-616,
https://doi.org/10.1016/j.petrol.2016.09.030 . .