Diamondoids in Oil and Gas Condensates (Review)

Nekhaev, A. I.; Максимов, А. Л.

doi:10.1134/s0965544119100098

Cited by 11 publications

(2 citation statements)

References 143 publications

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“…Larger diamondoids become more stable and appear on the stability map. Diamondoids were found in oil and gas condensates 42 and their amount reflects the extent of the natural oil cracking. 43 Yet another class of magic saturated hydrocarbons is graphanelike structures, the carbon backbone of which corresponds to a layer of diamond structure (#10, Figure 5b).…”

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confidence: 99%

“Magic” Molecules and a New Look at Chemical Diversity of Hydrocarbons

Lepeshkin

Baturin

Naumova

et al. 2022

J. Phys. Chem. Lett.

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We address the question why among the multitude of imaginable C n H m compositions some are easily synthesizable and abundant in nature, while others are not. To shed light on this problem we borrow approaches from nanocluster study, where stability with respect to neighboring compositions is used as a criterion of “magic” (particularly stable) clusters. By merging this criterion with predictions of lowest-energy structures of all C n H m molecules in a wide range of compositions (n ≤ 20, m ≤ 42) we provide guidelines for predicting the presence or absence of certain hydrocarbon molecules in various environments, their relative abundance and reactivity/inertness. The resulting maps of stability show the increased stability of C2n H2 compounds, polyaromatic hydrocarbons, and diamondoids, which is supported by experimental studies of the interstellar medium, flames, and petroleum fractions. This approach can be applied to any other molecular system, rationalizing the diversity of known compounds and predicting new potentially synthesizable molecules.

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confidence: 99%

“Magic” Molecules and a New Look at Chemical Diversity of Hydrocarbons

Lepeshkin

Baturin

Naumova

et al. 2022

J. Phys. Chem. Lett.

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“…The occurrence of higher thiadiamondoids with four–six cages has been proven by comprehensive two-dimensional gas chromatography time-of-flight mass spectrometry (GC × GC-TOF MS) of crude oils . GC × GC-TOF MS also plays an important role in the identification of thiadiamondoids with its multiple sulfur atoms, diamondoids with four–five cages, and ethanodiamondoids with two–three cages. − In addition, diamondoids in crude oils have been quantified using GC–triple quadrupole MS …”

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confidence: 99%

Discovery and Molecular Characterization of Organic Caged Compounds and Polysulfanes in Zhongba81 Crude Oil, Sichuan Basin, China

et al. 2020

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Deep carbonate strata in the Sichuan Basin in China mainly produce natural gas of high maturity. The discovery of uncommon condensate oil in the Zhongba gas field is of particular research interest. Condensate oil from the Zhongba81 well of the Lei3 Member of the Triassic Leikoupo Formation was comprehensively characterized using two-dimensional gas chromatography time-of-flight mass spectrometry. Abundant caged compounds (diamondoids, ethanodiamondoids, and thiadiamondoids), thiols, cyclic, and acyclic sulfides as well as polysulfanes were identified within it. High levels of diamondoids and ethanodiamondoids suggest that the condensate experienced high degrees of thermal cracking. Moderate levels of thiadiamondoids in the condensate and sulfur isotopes in abundant H 2 S show that the reservoir has undergone moderate thermochemical sulfate reduction alteration. A large number of low-molecular-weight sulfur compounds observed including thiols and polysulfanes have been preserved in the current low-temperature reservoir. More detailed information on the molecular composition of crude oil can facilitate stronger understanding of hydrocarbon accumulation and improve field exploration potential.

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Naturally Occurring Diamondoids

2024

The Chemistry of Diamondoids

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Diamondoids in Oil and Gas Condensates (Review)

Cited by 11 publications

References 143 publications

“Magic” Molecules and a New Look at Chemical Diversity of Hydrocarbons

“Magic” Molecules and a New Look at Chemical Diversity of Hydrocarbons

Discovery and Molecular Characterization of Organic Caged Compounds and Polysulfanes in Zhongba81 Crude Oil, Sichuan Basin, China

Naturally Occurring Diamondoids

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