Effect of Temperature on Kerogen Transformation and Hydrocarbon Generation in Bazhenov Formation (Western Siberia, Russia) Rocks During Hydrous Pyrolysis

Grigorii G. Savostin, Margarita S. Tikhonova, Anton G. Kalmykov (), Dmitry S. Volkov, Mariia O. Kostyshina, Olesya N. Vidishcheva, Mariia L. Makhnutina, Yuliya A. Kotochkova, Tatiana V. Grigorenko and Mikhail A. Proskurnin
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Grigorii G. Savostin: Geology Department, M.V. Lomonosov Moscow State University, Leninskie Gory, 1, GSP-1, 119991 Moscow, Russia
Margarita S. Tikhonova: Geology Department, M.V. Lomonosov Moscow State University, Leninskie Gory, 1, GSP-1, 119991 Moscow, Russia
Anton G. Kalmykov: Geology Department, M.V. Lomonosov Moscow State University, Leninskie Gory, 1, GSP-1, 119991 Moscow, Russia
Dmitry S. Volkov: Chemistry Department, M.V. Lomonosov Moscow State University, Leninskie Gory, 1-3, GSP-1, 119991 Moscow, Russia
Mariia O. Kostyshina: Geology Department, M.V. Lomonosov Moscow State University, Leninskie Gory, 1, GSP-1, 119991 Moscow, Russia
Olesya N. Vidishcheva: Geology Department, M.V. Lomonosov Moscow State University, Leninskie Gory, 1, GSP-1, 119991 Moscow, Russia
Mariia L. Makhnutina: Geology Department, M.V. Lomonosov Moscow State University, Leninskie Gory, 1, GSP-1, 119991 Moscow, Russia
Yuliya A. Kotochkova: Geology Department, M.V. Lomonosov Moscow State University, Leninskie Gory, 1, GSP-1, 119991 Moscow, Russia
Tatiana V. Grigorenko: Geology Department, M.V. Lomonosov Moscow State University, Leninskie Gory, 1, GSP-1, 119991 Moscow, Russia
Mikhail A. Proskurnin: Chemistry Department, M.V. Lomonosov Moscow State University, Leninskie Gory, 1-3, GSP-1, 119991 Moscow, Russia

Energies, 2024, vol. 18, issue 1, 1-23

Abstract: The aim of this investigation is to determine the role of temperature in hydrocarbon generation in Bazhenov formation source rocks, as hydrothermal processes in situ are supposed to be the main contributor to kerogen transformation in Western Siberia. Laboratory modeling of organic matter isothermal transformation in powdered and extracted samples by hydrous pyrolysis at 300 °C, 325 °C, 350 °C, 375 °C, and 400 °C for 24 h was performed. Heated samples were analyzed via pyrolysis, and hydrocarbons were investigated by GC and GC-MS. Results show that more than 90% of the kerogen generation potential was utilized. The amounts of liquid and gaseous products reached 82 and 126 mg of hydrocarbon/g TOC, respectively. The volume of generated gas increased while the maximum production of liquid decreased with temperatures over 350 °C. The biomarker composition of liquid products at different temperatures was similar. The characteristics of kerogen and the product composition had a high correlation with the parameters for samples naturally formed in situ under an elevated heat flow. More subtle chemical analyses are required to determine the effects of kerogen’s chemical structure and the rock mineral composition on oil and gas generation.

Keywords: Bazhenov formation; hydrous pyrolysis; pyrolysis; kerogen; organic matter conversion; oil and gas generation; biomarker analysis; Western Siberia (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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