Aromatic hydrocarbons in Mongolian oils

Molecular mass distributions of components of 24 isobaric homologous series of aromatic hydrocarbons were established in crude oils from Lower Cretaceous (Zuunbayan oil field) and Jurassic (Tamsagbulag oil field) deposits. The concentrations of individual C-10-C-14 biarenes and C-14-C-17 triarenes in these oils were determined, the salient features of the isomer composition of these hydrocarbons were revealed, and this composition was correlated with the thermodynamic stability of the compounds

Structure and compositions of cenozoic oils from the pannonian basin (Yugoslavia)

The average structural characteristics of oily and resinous components of nine crude oils of various types from different Miocene horizons of the Sirakovo and Bradarac-Maljurevac oil fields (Serbia), as well as the mass-spectrometrically established hydrocarbon-group composition of these oils, are described. The most abundant components of crudes from both oil fields are mono- and bicyclanes bearing long alkyl substituents. It was found that there is no universal trend in the chemical type of the oils with the occurrence depth of the producing zones in these fields, that is, oils are enriched in aliphatic hydrocarbons with depth in the Sirakovo oil field and in naphthene hydrocarbons in the Bradarac field. These trends cannot be explained by microbial degradation processes or by the catagenetic alteration of petroleum composition in the Earth's interior and indicate a low level of thermal maturity of the source organic matter that gave rise to the hydrocarbon systems in question. A certain parallelism of variation in the structural parameters of hydrocarbonaceous and heteroorganic (resinous) components of the oils depending on natural factors is noted

Structure and compositions of cenozoic oils from the pannonian basin (Yugoslavia)

The average structural characteristics of oily and resinous components of nine crude oils of various types from different Miocene horizons of the Sirakovo and Bradarac-Maljurevac oil fields (Serbia), as well as the mass-spectrometrically established hydrocarbon-group composition of these oils, are described. The most abundant components of crudes from both oil fields are mono- and bicyclanes bearing long alkyl substituents. It was found that there is no universal trend in the chemical type of the oils with the occurrence depth of the producing zones in these fields, that is, oils are enriched in aliphatic hydrocarbons with depth in the Sirakovo oil field and in naphthene hydrocarbons in the Bradarac field. These trends cannot be explained by microbial degradation processes or by the catagenetic alteration of petroleum composition in the Earth's interior and indicate a low level of thermal maturity of the source organic matter that gave rise to the hydrocarbon systems in question. A certain parallelism of variation in the structural parameters of hydrocarbonaceous and heteroorganic (resinous) components of the oils depending on natural factors is noted

Aromatic hydrocarbons in Mongolian oils

Molecular mass distributions of components of 24 isobaric homologous series of aromatic hydrocarbons were established in crude oils from Lower Cretaceous (Zuunbayan oil field) and Jurassic (Tamsagbulag oil field) deposits. The concentrations of individual C-10-C-14 biarenes and C-14-C-17 triarenes in these oils were determined, the salient features of the isomer composition of these hydrocarbons were revealed, and this composition was correlated with the thermodynamic stability of the compounds

Saturated hydrocarbons in mesozoic oils from Mongolia

Individual compositions were determined for relict biogenic hydrocarbons occurring in typical Mesozoic crude oils from the East Gobi and Tamsag oil-bearing provinces of Mongolia. Possible biological origins of these oils and the routes of formation of their hydrocarbon-group composition are discussed

Saturated hydrocarbons in mesozoic oils from Mongolia

Individual compositions were determined for relict biogenic hydrocarbons occurring in typical Mesozoic crude oils from the East Gobi and Tamsag oil-bearing provinces of Mongolia. Possible biological origins of these oils and the routes of formation of their hydrocarbon-group composition are discussed