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Evaluating Molecular Evolution of Kerogen by Raman Spectroscopy: Correlation with Optical Microscopy and Rock-Eval Pyrolysis

1
Department of Petroleum Engineering, University of North Dakota, Grand Forks, ND 58203, USA
2
Raman Application Department, HORIBA Scientific, Edison, NJ 08820, USA
3
Geology and Petrology department, Core Laboratories, Houston, TX 77040, USA
*
Author to whom correspondence should be addressed.
Energies 2018, 11(6), 1406; https://doi.org/10.3390/en11061406
Received: 5 May 2018 / Revised: 28 May 2018 / Accepted: 28 May 2018 / Published: 31 May 2018
(This article belongs to the Section Energy Sources)
Vitrinite maturity and programmed pyrolysis are conventional methods to evaluate organic matter (OM) regarding its thermal maturity. Moreover, vitrinite reflectance analysis can be difficult if prepared samples have no primary vitrinite or dispersed widely. Raman spectroscopy is a nondestructive method that has been used in the last decade for maturity evaluation of organic matter by detecting structural transformations, however, it might suffer from fluorescence background in low mature samples. In this study, four samples of different maturities from both shale formations of Bakken (the upper and lower members) Formation were collected and analyzed with Rock-Eval (RE) and Raman spectroscopy. In the next step, portions of the same samples were then used for the isolation of kerogen and analyzed by Raman spectroscopy. Results showed that Raman spectroscopy, by detecting structural information of OM, could reflect thermal maturity parameters that were derived from programmed pyrolysis. Moreover, isolating kerogen will reduce the background noise (fluorescence) in the samples dramatically and yield a better spectrum. The study showed that thermal properties of OM could be precisely reflected in Raman signals. View Full-Text
Keywords: unconventional reservoirs; kerogen; vitrinite maturity; Rock-Eval; Raman spectroscopy unconventional reservoirs; kerogen; vitrinite maturity; Rock-Eval; Raman spectroscopy
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MDPI and ACS Style

Khatibi, S.; Ostadhassan, M.; Tuschel, D.; Gentzis, T.; Carvajal-Ortiz, H. Evaluating Molecular Evolution of Kerogen by Raman Spectroscopy: Correlation with Optical Microscopy and Rock-Eval Pyrolysis. Energies 2018, 11, 1406. https://doi.org/10.3390/en11061406

AMA Style

Khatibi S, Ostadhassan M, Tuschel D, Gentzis T, Carvajal-Ortiz H. Evaluating Molecular Evolution of Kerogen by Raman Spectroscopy: Correlation with Optical Microscopy and Rock-Eval Pyrolysis. Energies. 2018; 11(6):1406. https://doi.org/10.3390/en11061406

Chicago/Turabian Style

Khatibi, Seyedalireza; Ostadhassan, Mehdi; Tuschel, David; Gentzis, Thomas; Carvajal-Ortiz, Humberto. 2018. "Evaluating Molecular Evolution of Kerogen by Raman Spectroscopy: Correlation with Optical Microscopy and Rock-Eval Pyrolysis" Energies 11, no. 6: 1406. https://doi.org/10.3390/en11061406

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