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The transformation of hydrothermal processes in sediments is accompanied by the transformation of organic matter. Work presents an analysis of the change in the composition of the bitumoid of domanic sediments of the Volga-Ural oil and gas province with thermal effects on the specimen of the kerogen containing formation. The laboratory modelling of the katagenesis process on domanic rock sample was conducted in autoclave at a pressure of 50 atm, at a temperature range of 200-350 °C with the addition of water, and ...

The sediments of the of the Middle Franconian stage of the Upper Devonian along the cut contain the maximum amount of dispersed organic matter. This rock complex is the main oil producing stratum for most oil and gas fields on the territory of the Volga-Ural basin. The Semiluks horizon is represented by three types of sections: typical of Dominic and transitional ones. In Sargaevian sedimentation occurred under conditions of a shallow, epicontinental, open sea with normal salinity of water. The parameters of kerog...

Depositions of the Domanic type in the territory of Tatarstan are stratigraphically associated with carbonate-siliceous deposits of the Upper Devonian part of the section. These deposits, enriched with organic matter, are characterized by the ability to generate liquid and gaseous hydrocarbons and accumulate them in the form of deposits of unconventional type. In this paper, the results of geochemical studies of rock samples from the depth interval 1705-1728 m of the Semi-Bug-Buregian deposits of the Berezovskaya ...

Today, as a result of the depletion of low- and medium-density oil deposits, the world faces the problem of increasing oil production by involving non-traditional, alternative sources of hydrocarbon raw materials, which include fuel shale. In the area of the Volga-Ural oil and gas province, tight shale hydrocarbons reserves are located in domanic sediments. Quantity and spatial distribution of organic matter of domanic species remains underinvestigated. Assessment of oil potential, generation of mobile hydrocarbon...

The deposits of light oil and gas in the Devonian sediments of the "Ansagan" deposit are found. In the deposits of the Famenian stage of the upper Devonian, a gush of gas condensate was obtained. Samples of formation fluid are characterized by low density (0.78 g/cm3). The extracted oil refers to low-tar and paraffin (the content of paraffins is more than 2-3 %). The genetic relationship between oils and organic matter of rocks has been studied. To determine the group composition of bitumoids, the SARA method was ...

Data characterizing biological productivity of wooden layer in dark coniferous forests secondary succession stands of southern taiga subzone of West Siberian continental sector have been given. Thus, the obtained data prove that ecosystems of the same age group which vary in type of root vegetation forming, developing under the similar vitality conditions (temperature, moisture and nutrition) form different organic matter stores in phytomass. The wooden layer phytomass of secondary birch stands accumulates almost ...

The objects of the study were samples of Domanik rock from Upper Devonian siliceous-carbonate and carbonate sediments of the Romashkin? oil field, which occurs in the central part of the South Tatarian arch in Tatarstan. The composition of organic matter and mineral rock components and bitumoids extracted from them was studied by thermal analysis, X-ray diffraction analysis, SARA analysis and gas chromatography. Significant differences in the mineralogical composition and content of organic matter are found in sam...

Revealing the conditions and mechanisms of evolution of oil deposit based on optical and electron microscopy, electron paramagnetic resonance (EPR) is a necessary step to create improved of recovery methods. Application EPR for study temperature, mechanical and radiation dynamics of organic matters were presented in this communication. The subject of the investigation was the core material from Bazhenov suite (East Siberian oil and gas province). In order to reveal the features of the material composition and the ...

The Volga-Ural oil and gas province is one of the oldest oil-producing regions in Russia. The central position in its borders is occupied by Tatarstan, in the territory of which is explored the largest oil deposits of the region. Oil deposits belong to the Devonian sediments, and in a lesser degree to the Carboniferous and Permian deposits. Despite the high degree of research of the region, the origin of oil deposits still one of the most controversial issues. Most researchers consider that the source of oil is th...

On the territory of the Volga-Ural oil and gas province in the Permian sediments are concentrated significant resources of bitumen-containing rocks, which are of interest as a source of unconventional oil. In this connection, it is very important to clarify the conditions for the formation of bituminous strata and their productive areas. High efficiency in the study of oil-bearing rocks has radio-spectroscopic methods for determining the structure of the oil deposit and the nature of its oil and bitumen saturation...

In connection with finding - out of a question about probable feeding of deposits by hydrocarbons, acting from the basement, the results of integrated geologicalgeochemical research of the dynamics of variation of chemical and geochemical parameters of oils and bitumen from the rocks of sedimentary cover and basement in the zones of probable inflow of hydrocarbons at the central areas of the Romashkino oil field are presented in this work. Also the results of researches on comparative studying of changes in organi...

This paper presents the dependence between particles of various sizes present in the sediments collected from the Klusov (Slovakia) water reservoir, such as sand, silt and clay and their nutrient content. The results of physical characteristics of sediments indicate that the clay/silt fraction dominated in the reservoir sediments. Chemical analysis showed that the total nitrogen content in sediments was recorded from 0.07 % in sediment collected at the inlet to the reservoir to 0.26 % in sediment taken near to the...

Numerous past studies proved the potential of fluorescence spectroscopy to characterize aquatic organic matter and its link to function and chemical water quality. It was proposed as an optimum monitoring method due to its advantages, such as: rapid measurements, high sensitivity and selectivity, requires small quantities of sample with little or no sample preparation. Although fluorescence spectroscopy was used on different types of water systems, no complex study was undertaken to compare the fluorescence signal...

Investigation of the paramagnetic properties of core samples from the section of the reference well was performed on the basis of a representative sample (97 samples) by electron paramagnetic resonance (EPR) for mineral associations of the Evlan horizon of the Upper Devonian deposits of the Volga-Ural region of the Republic of Tatarstan. Within the Volga-Ural region, reef formation dates back to the late Frasnian and has developed to the maximum extent in the Voronezh, Evlan and Liven times. The deposition of the ...

Carbonaceous material (CM) from Outer Carpathians hydrothermal veins was investigated by Raman spectroscopy in order to reveal thermal conditions of its alteration. The studied CM as being found in association with ?marmarosh diamonds? confirms that the crystallization environment of this mysterious quartz variety is connected with thermally-influenced organic matter. Obtained temperatures in the range of 159 to 205°C are indicative for low to medium hydrothermal conditions. Presented temperatures stay in quite co...

The reef system (carbonate platform) is a geomorphological barrier and a sedimentary and chemical-biological filter in a directed flow of geo-biosphere processes. To carry out lithological and geochemical reconstructions of these processes, an analysis of the change in oxidation-reduction conditions, climate, intake of organic matter type and mineral composition is required. Increased attention to these carbonate platforms is due to the fact that within their boundaries hydrocarbon deposits are discovered, confine...