The model of accumulation radiolarite layers in the bazhenov formation of West Siberia

2019 ◽  
pp. 92-97
Author(s):  
O. V. Khotylev ◽  
N. A. Balushkina ◽  
V. S. Vishnevskaya ◽  
N. I. Korobova ◽  
G. A. Kalmykov ◽  
...  
Keyword(s):  
Western Siberia ◽  
West Siberia ◽  
Textural Features ◽  
High Carbon ◽  
Bazhenov Formation ◽  
Siliceous Rocks

The Bazhenov Formation of Western Siberia is one of the most important and promising high-carbon formations. Its peculiarity is a huge area of distribution and high generation potential of its constituent deposits. Another feature of the formation is the predominance of silicides in its composition, among which the most interesting are radiolarites, which are often associated with hydrocarbon inflows. However, the mechanism of the forecast and the nature of their distribution still do not have an unambiguous solution. Based on a study of the composition and textural features of the structure of radiolarite layers in the clayey-siliceous rocks of the Bazhenov formation, a model of their formation based on the interaction of plankton (radiolarians) and currents is proposed.

Features of the microcomponent composition of pore solutions of rocks of the Bazhenov Formation in Western Siberia

2019 ◽  
pp. 49-58
Author(s):  
T. A. Kireeva ◽  
A. Yu. Bychkov ◽  
M. Yu. Zubkov
Keyword(s):  
Natural Waters ◽  
Western Siberia ◽  
Experimental Studies ◽  
Ocean Water ◽  
Pore Waters ◽  
Bazhenov Formation ◽  
Clay Deposits ◽  
Siliceous Rocks ◽  
Organic Clay ◽  
The Relationship

The results of experimental studies of the macro- and microcomponent composition of pore solutions of bituminous clay-siliceous rocks of the Bazhenov Formation (BS) of Western Siberia, containing up to 12.63% Corg (“normal rocks”), as well as silt-sandstones from the “anomalous” section are presented. BS with a Corg content of up to 0.63% (“abnormal” rocks) obtained on the basis of a study of aqueous extracts from core samples. It has been established that pore solutions of “normal” BS rocks have a sulfate-bicarbonate-sodium composition, and “abnormal” ones have a hydrocarbonate-sodium chloride composition. In pore solutions of both “normal and“ abnormal ”rocks relative to ocean water, the following were noted: a) concentration of Mn, Co, Ni, Cu, Zn, Mo, Sb, Cd, Ba, V, Cr of various degrees of intensity; b) increased content of Cs, Pb, Ti only in pore solutions of “abnormal” rocks; c) reduced content of Li, B, Rb, Sr. A direct relationship was found between the contents of Li, B, Ba, Sr, U, Mo, Cd, Sb, and Ni with the content in the Corg rock. For V, Cs, Sb, Rb, Ti, Mn in pore waters, the relationship with the amount of Corg in the rocks is close to the inverse relationship. In the pore solutions of “normal” BS rocks, the Ba content is equal to or higher than the Sr content, which is anomalous with respect to the stratal waters of most oil fields and ocean water and, apparently, is associated with the peculiarities of the accumulation of organic clay deposits, since in “anomalous” rocks The BS content of Sr is two times higher than the Ba content, which is closer to the usual for most natural waters.

scholarly journals Composition and age of monacite fragments from superior jurassic terrigenous sediments of bazhenov formation foundation (multan area in west siberia)

2020 ◽  
Vol 33 (01) ◽  
pp. 84-93
Author(s):  
Yuriy V. Erokhin ◽  
Kirill S. Ivanov ◽  
Vera V. Khiller
Keyword(s):  
Rare Earth ◽  
Western Siberia ◽  
Chemical Properties ◽  
West Siberia ◽  
Upper Jurassic ◽  
Yenisei Ridge ◽  
Bazhenov Formation ◽  
Terrigenous Sediments ◽  
Lower Proterozoic ◽  
Rare Earth Phosphate

Bazhenov Formation is regarded as the main oil-bearing stratum mothering nearly all the fields of the Western Siberia Oil-Gas-bearing Megabasin. Presently, it is one of the most studied formations of Siberia and, probably, Eurasia as a whole. While there is an enormous amount of studies devoted to the Bazhenov Formation, there are no detailed mineralogical studies at the modern hardware level. The age and sources of the terrigenous materials of the formation have not been studied as well. We have explored the detrital monazite from the upper-Jurassic terrigenous sediments of the Multan Area at the foundation of the Bazhenov Formation in the central part of Western Siberia, Surgut District. All the detrital rare earth phosphate is of the cerium kind being a monazite-(Се). The mineral is rather dissimilar in respect of its chemical properties, especially, the content of thorium. Some fragments have been subjected to superposed secondary changes. The detrital monazite is rounded to various degrees which is indicative of the various distances from the rare earth phosphate orebody washout. As per the chemical data, most of the monazite has been washed out from the medium and basic rocks (probably subalkaline or alkaline) as well as the sialic rocks (granitoids and associated veins). According to the chemical dating, most of the monazite fragments have been washed out of the very ancient Proterozoic formations and lower-Proterozoic rocks. Terrigenous materials derives probably from the rock assemblages of the eastern and south-eastern fringes of the Western Siberian megabasin such as the Proterozoic Yenisei Ridge or Lower-Proterozoic blocks of the Altay and Sayan Faulting.

STRUCTURE OF BAZHENOV HORIZON IN THE NORTH-EAST OF WEST SIBERIA

2018 ◽  
pp. 41-45
Author(s):  
R. M. Gilaev ◽  
A. V. Stupakova ◽  
A. N. Stafeev ◽  
A. A. Suslova ◽  
E. S. Shelkov
Keyword(s):  
West Siberia ◽  
High Carbon ◽  
Bazhenov Formation ◽  
North East ◽  
The North ◽  
New Variant ◽  
North Eastern ◽  
Bazhenov Horizon ◽  
Lower Berriasian ◽  
North Eastern Part

Based on the lithofacies and structural analysis we consider a new variant of the structuralfacies zonation of the Bazhenov horizon (Tithonian — lower Berriasian) in the north-eastern part of West Siberia. The low content of terrigenous sedimentary material in high-carbon facies the bazhenov formation, due to its capture of relatively deep Pur-Tazovsky paleobasins, which formed the cone of the Yenisei-Khatanga sea strait. Pur-Tazovsky basin filled with the yanovstanskaya formation, he adjoined from the north-east to extensive relatively shallow Obsky paleobasin — the accumulation of black shale bazhenov formation.

scholarly journals Types of Void Space in the Bazhenov Reservoir Rocks

Geosciences ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 269
Author(s):  
Olga V. Postnikova ◽  
Alexander V. Postnikov ◽  
Olga A. Zueva ◽  
Artem E. Kozionov ◽  
Ekaterina V. Milovanova ◽  
...  
Keyword(s):  
Western Siberia ◽  
Distribution Patterns ◽  
Void Space ◽  
X Ray Diffraction ◽  
Bazhenov Formation ◽  
Reservoir Rocks ◽  
Oil Reserves ◽  
Light Oil ◽  
Clay Rocks ◽  
High Degree

The deposits of the Bazhenov formation are a unique reservoir of unconventional oil reserves in Western Siberia. They contain both solid organic matter (kerogen) and liquid light oil. The successful development of these hydrocarbons is largely determined by the adequacy of the void space models. The aim of the study is to identify the types of void space in the sediments of the Bazhenov formation and to identify the distribution patterns across the section of the researched wells. The void space was studied by electron and optical microscopy, and the mineral composition of the rocks was determined by X-ray diffraction analysis. The deposits of the Bazhenov productive formation in the territory of Western Siberia are represented by a wide complex of lithotypes, including various kinds of silicites, carbonate, clay rocks, and mixtites. The reservoir space in the reservoir rocks of the Bazhenov formation is a complex and hierarchically subordinated system, which includes voids and fractures of various sizes, configurations, and genesis. The void space of the Bazhenov formation is characterized by a fairly high degree of spatial heterogeneity, which is controlled by lithological, facies, and tectonic factors, as well as the direction of catagenetic processes.

The structure of the pore volume of the reservoir intervals of the Bazhenov formation of the Priobskoye field of Western Siberia

2019 ◽  
pp. 39-45
Author(s):  
A. S. Roslyakova ◽  
A. G. Kalmykov ◽  
G. A. Kalmykov ◽  
R. A. Khamidullin ◽  
N. I. Korobova ◽  
...  
Keyword(s):  
Organic Matter ◽  
Pore Volume ◽  
Western Siberia ◽  
Gas Permeability ◽  
Reservoir Properties ◽  
Bazhenov Formation ◽  
Siliceous Rock ◽  
Local Warming ◽  
The Absolute ◽  
Structural Zones

The paper presents a study of the structure and reservoir properties of rocks of the Bazhenov formation in the sections of three wells located in different structural zones of the Priobskoye field. It is shown that the porosity of the samples varies from 0.02% to 6.95%, the absolute gas permeability of the rocks reaches 1.364 mD. It is established that the collectors in the Bazhenov formation are confined to silicite-radiolarites (possessing porosity associated with the leaching of radiolarian shells) and kerogen-clay-siliceous rock and kerogen-clay silicite (porosity is associated with the release of space between the clay-siliceous matrix and kerogen by ripening organic matter). The following secondary processes influenced the formation of voids in these lithotypes: recrystallization of radiolarians and local warming up.

Distribution of organic matter in Bazhenov high-carbon formation

2019 ◽  
pp. 46-56
Author(s):  
M. S. Topchii ◽  
N. V. Pronina ◽  
A. G. Kalmykov ◽  
G. A. Kalmykov ◽  
M. M. Fomina ◽  
...  
Keyword(s):  
Organic Matter ◽  
Geological Structure ◽  
Heterogeneous Structure ◽  
Carbon Formation ◽  
High Carbon ◽  
Mixed Composition ◽  
Shale Formations ◽  
Bazhenov Formation ◽  
Geological Features ◽  
Micro Level

One of the most famous and promising shale formations in Russia is the Bazhenov formation. The ambiguity of ideas about its geological features, caused by the complex, heterogeneous structure of the strata, attracts the attention of many researchers. In this work, the Bazhenov formation is singled out in conjunction with its stratigraphic counterparts in the Bazhenov high-carbon formation (BVCHF). In this were considered the main characteristics of its allotment and distribution over the area, as well as the geological structure. Being an unconventional reservoir of hydrocarbons, BVCHF has properties of a petroleum-bearing rock, one of the main characteristics of which is organic matter, its type and maturity. The paper presents the results of the study of organic matter by various methods at the micro level, as well as their integration with larger-scale studies. The need for detailed consideration of the organic matter of the BVCHF is justified by the fact that it has a mixed composition and, as a consequence, a different degree of transformation and spatial distribution.

scholarly journals TECHNOLOGICAL RESEARCH INTO THE METAL ATTRIBUTES OF THE NORTHERN SELKUP SHAMAN COSTUME OF THE XVII–XVIII CENTURIES

2020 ◽  
pp. 85-100
Author(s):  
N.M. Zinyakov ◽  
O.E. Poshekhonova
Keyword(s):  
Western Siberia ◽  
Raw Materials ◽  
High Carbon Steel ◽  
Ferrous Metal ◽  
Production Equipment ◽  
Metallographic Analysis ◽  
Burial Ground ◽  
High Carbon ◽  
Technological Research ◽  
Technological Methods

To reconstruct the technological methods and technical achievements of Northern Selkup blacksmiths, the components of the Northern Selkup shaman costume, which is composed of ferrous metal, were studied using metallographic analysis methods. The materials were found in two graves in a Kikki-Akki burial ground from the XVII–XVIII centuries (Western Siberia, Taz river). It was found that the basic raw materials for production were unevenly carbonized steel and soft iron; high-carbon steel was also found in rare instances, which was most likely received by Northern Selkup blacksmiths from Russia. The iron items of the shaman costume were forged by professional blacksmiths who possessed complex technological skills and production equipment.

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