Article
Environmental Sciences
Gerardo Gold-Bouchot, Flor Arcega-Cabrera, Victor Ceja-Moreno
Summary: Oil extraction and transport activities in the Gulf of Mexico are increasing the concentration of polycyclic aromatic hydrocarbons (PAHs) and exerting environmental pressure on the ecosystem. This study analyzed PAH levels in the Perdido Fold Belt area from May 2016 to September 2017 and found that the highest concentrations were recorded during the September 2017 cruise. The spatial distribution of PAHs showed higher values in the southern and northeastern areas, with riverine inputs playing a significant role.
FRONTIERS IN MARINE SCIENCE
(2023)
Article
Energy & Fuels
Guillermo Felix, Alexis Tirado, Alexander Quitian, Vicente Samano, Mikhail A. Varfolomeev, Chengdong Yuan, Jorge Ancheyta
Summary: The characterization of SARA fractions of heavy crude oils during hydrocracking reactions is usually focused on asphaltenes, with limited studies on the structural differences of all SARA fractions. In this study, a heavy crude oil was upgraded by non-catalytic and catalytic hydrocracking, and it was found that the hydrogenation capacity of each catalyst affects the average molecular weight of all SARA fractions, with Fe2O3 (analytical grade) having the most significant impact. The hydrocracking reactions also resulted in a reduction in the number of aliphatic carbons in aromatics, resins, and asphaltenes fractions, increasing their aromaticity.
Article
Energy & Fuels
Yumeng Chen, Dian Zhang, Junguo Li, Changning Wu, Ke Liu
Summary: This study presents a case study on scavenging combustible matter in waste coal using a self-designed collector Ksw, consisting of kerosene, span, and water. The results showed that Ksw outperformed conventional collectors in terms of floatability and economic feasibility. The superior performance of Ksw was attributed not only to the oil droplet size and number but also to its specific composition features.
Article
Geosciences, Multidisciplinary
Wenwen Li, Jian Cao, Dongming Zhi, Yong Tang, Wenjun He, Tingting Wang, Liuwen Xia
Summary: Understanding the potential and controls on shale oil accumulation in alkaline lacustrine settings is crucial for global shale oil budget evaluation. Fine-grained sedimentary rocks in alkaline lacustrine settings, particularly argillaceous dolomite and pyroclastic rocks, show high shale oil potential with good hydrocarbon generation potential and abundant fractures and pores. Further studies are needed to precisely evaluate shale oil potential in relation to TOC and explore new proxies and standards.
MARINE AND PETROLEUM GEOLOGY
(2021)
Article
Geosciences, Multidisciplinary
Jinbu Li, Min Wang, Junsheng Fei, Liang Xu, Haoming Shao, Ming Li, Weichao Tian, Shuangfang Lu
Summary: The determination of in situ hydrocarbon content and occurrence characteristics of shale oil reservoirs is crucial for efficient development. This study proposes a 2D NMR T1-T2 mapping method to assess the water and oil content, distribution, and evaporative loss laws of preserved shales. The T1-T2 mapping can effectively determine the porosity, water and oil contents, and saturations of preserved shales in a nondestructive and rapid way, making it a valuable tool for determining in situ fluid content.
MARINE AND PETROLEUM GEOLOGY
(2022)
Article
Geochemistry & Geophysics
Yinhua Pan, Maowen Li, Yongge Sun, Zhiming Li, Lingling Liao, Yuhong Liao
Summary: Understanding the formation and enrichment mechanisms of shale oil is crucial for evaluating shale oil exploration and production. This study simulated the petroleum generation and expulsion processes of Type II kerogen in an organic-rich shale through semi-open hydrous pyrolysis experiments. The structural characteristics of kerogen, bitumen fractions, and expelled oil during shale maturation were analyzed using Fourier transform infrared spectroscopy and quantitative flash pyrolysis-gas chromatography. The results showed that the composition of expelled oils changed with increasing maturity, while the structural composition of kerogen exhibited an opposite trend. The cracking and condensation of kerogen and bitumen fractions, as well as compositional fractionation due to oil expulsion, were identified as the main factors influencing these trends. Overall, decarboxylation was observed during shale maturation in general for kerogen, expelled oil, and bitumen.
ORGANIC GEOCHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
N. V. Sizova
Summary: The initiating effect of high-molecular oil fractions on cumene radical oxidation was investigated using microcalorimetry. It was found that initiators appear in the high-molecular fractions of oil during their isolation from native oils. The content of nickel, vanadium, and vanadylporphyrins was found to have a weak correlation with the initiating activity. Additionally, initiators were identified in freshly isolated 'acid resin' fractions, which lost their initiating ability during storage due to chemical condensation processes. This method can be used to determine the content of inhibitors or initiators of radical oxidation in oil objects.
CHEMISTRY FOR SUSTAINABLE DEVELOPMENT
(2023)
