scholarly journals SEISMOSTRATIGRAPHIC MODEL OF THE ALADAN-MAYA SEDIMENTARY BASIN, SOUTHEASTERN SIBERIAN PLATFORM

2020 ◽  
Vol 39 (6) ◽  
pp. 25-47
Author(s):  
E.P. Razvozzhaeva ◽  
Keyword(s):  
Siberian Platform ◽  
Oil And Gas ◽  
Sedimentary Basin ◽  
Sedimentary Cover ◽  
Parent Material ◽  
Geologic Map ◽  
Seismic Sections ◽  
Basin Boundaries

Generations of the materials of the seismic exploratory works conducted in the Aldan-Maya sedimentary basin substantiated the seismostratigraphic model and construction of the lateral and longitudinal sections allowed an understanding of the specific features of the sedimentary cover structure and specifying the basin boundaries. Based on the seismic sections and geologic map at a scale of 1: 2 500 000 a scheme of structures formed in the Riphean was developed. These constructions made it possible the purposeful plan of the oil-and-gas searching and exploratory works, estimation of thickness and area of the parent material. The investigations made can be applied for clarification of the structure of the eastern Siberian Platform.

Geothermal features of the western part of Yenisei-Khatanga regional trough

2019 ◽  
pp. 28-36
Author(s):  
Dmitry A. Novikov
Keyword(s):  
Oil And Gas ◽  
Sedimentary Basin ◽  
Sedimentary Cover ◽  
Heating Effect ◽  
Small Thickness ◽  
Geological Evolution ◽  
Geological Section ◽  
Gas Bearing ◽  
Different Parts ◽  
Comprehensive Study

The article deals with the results of a comprehensive study of the geothermal conditions of oil and gas bearing deposits in the western part of Yenisei-Khatanga regional trough. Four types of vertical geothermal zonality are established, the characteristics of which depend on the geological evolution of different parts of the sedimentary basin. The minimal geothermal gradients (1,80–2,2 0 C/100 m) are established there in the near edge zones with a small thickness of the sedimentary cover and the development of the infiltration system. The maximum gradients (3,2–3,4 0 С/100 m) are established in the zones of disjunctive tectonics, which had a significant heating effect on the geological section due to the ascending discharge of groundwater from deep-lying aquifers.

scholarly journals Application of experimental tectonic methods in petroleum geology on the examples of deposits in Western Siberia

2019 ◽  
pp. 92-109
Author(s):  
M. Yu. Zubkov
Keyword(s):  
Western Siberia ◽  
Oil And Gas ◽  
Sedimentary Cover ◽  
Optical Polarization ◽  
Mechanism Of Formation ◽  
Tectonic Structures ◽  
Stress Regime ◽  
Tangential Stresses ◽  
Seismic Sections ◽  
Hydrocarbon Deposits

Modeling of the most common types formation of anticlinal and uplift-thrust tectonic structures was carried out with using optical polarization and tectonic-sedimentary methods based on seismic sections analysis of various areas and deposits located in the West Siberian oil and gas basin that were selected for examples. Experiments with using the optical-polarization method allowed us to research the nature of the stress-regime arising in the gelatin models of the sedimentary cover due to the growth of anticlinal blocks and uplift-thrust dislocations. By the level of tangential stresses and orientation of isoclines in optical models, zones of probable tectonogenic fracture and the direction of cracks are predicted. 2D tectonic-sedimentation modeling made possible to explain the mechanism of formation of “rootless” uplifts, zones of subsidence or decompression in sediments, the principle of tectonic “pump” function, and to obtain dependencies between size and shape of uplift, density and opening of cracks formed above, to calculate the value of fracture “porosity”, as well as lateral dimensions of zones of tectonogenic fracturing. 3D tectono-sedimentation modeling allowed to link hydrography of the earth surface of the simulated area with decompression of zones that came to the surface in the models. These zones of decompression can serve as a search sign for exploration of highly productive zones containing hydrocarbon deposits.

scholarly journals CONDITIONS FOR THE FORMATION OF CLINOFORMS IN THE MIDDLE AND SOUTH CASPIAN MEGABASIN

2021 ◽  
Vol 2 (446) ◽  
pp. 82-89
Author(s):  
P. Z. Mammadov ◽  
R. Y. Ganiyevа
Keyword(s):  
Oil And Gas ◽  
Sedimentary Basin ◽  
Sedimentary Cover ◽  
Mobile Belt ◽  
South Caspian Basin ◽  
Stratigraphic Analysis ◽  
Central Segment ◽  
Specific Shape ◽  
New Perspective

The paper considers sedimentation process and objects of lateral development in deep-water uncompensated and shallow-water – epicontinental paleobasins developed at various evolution stages of South- Caspian and Middle-Caspian basins. The South Caspian megabasin is a great tectonic crustal element and a highly prospective sedimentary basin in the central segment of the Alpine-Himalayan mobile belt. The role of boundary structures of Scythian-Turan platform in the Middle Caspian (such as South-Caspian land and Karaboghaz arc) and avalanche sedimentation on the continental shelf in development of sedimentation units and specific shape objects of lateral development in many kilometers long sedimentary cover of South-Caspian basin has been shown. According to interpretation of seismo-stratigraphic data the inflow of paleodeltaic, avandelatic and turbidite objects of lateral development for infill of the Early Pliocene basin has been proved. Seismo-stratigraphic analysis, using other analyses (e.g. study of morphostructure of palaeorelief and thicknesses of the units and formations) and GSW, enabled the genesis of deposits in the underlying PS formations to be clarified from a new perspective and the favou- rable zones of formation of large lithological and stratigraphic traps for oil and gas accumulations to be identified.

scholarly journals Geological structure of the northern part of the Kara Shelf near the Severnaya Zemlya archipelago according to recent studies

2020 ◽  
Vol 245 ◽  
pp. 505-512
Author(s):  
Evgeny Gusev ◽  
Alexey Krylov ◽  
Dmitry Urvantsev ◽  
Yury Goremykin ◽  
Petr Krynitsky
Keyword(s):  
Oil And Gas ◽  
Sedimentary Basin ◽  
Sedimentary Cover ◽  
Geological Structure ◽  
The Arctic ◽  
The West ◽  
The North ◽  
Thin Carbon ◽  
Severnaya Zemlya ◽  
Gas Potential

Until recently, the North of the Kara Shelf was completely unexplored by seismic methods. Seismic and seismo-acoustic data that have appeared in recent years have made it possible to decipher features of the regional geological structure. This study solves the urgent problem of determining the prospects for the oil and gas potential of the North Kara sedimentary basin. The relevance of the research is associated with determining the prospects of the oil and gas potential of the North Kara sedimentary basin. The aim of the study is to clarify the age of the reflecting horizons using data on the geology of the island, as well as to determine the tectonic position of the sedimentary cover and basement structures in the north of the Kara shelf. The sedimentary cover is divided into three structural levels: Cambrian-Devonian, Middle Carboniferous-Cretaceous, Miocene-Quarter. The Cambrian-Devonian complex fills the deep troughs of the North Kara shelf. The most noticeable discontinuity is the base of Carboniferous-Permian rocks, lying on the eroded surface of folded Silurian-Devonian seismic complexes. The blanket-like plate part of the cover is composed of thin Carbon-Quarter complexes. The authors came to the conclusion that the fold structures of the Taimyr-Severozemelskiy fold belt gradually degenerate towards the Kara sedimentary basin and towards the continental slope of the Eurasian basin of the Arctic Ocean. A chain of narrow uplifts within the seabed relief, which correspond to narrow anticlines is traced to the West of the Severnaya Zemlya islands. Paleozoic rocks have subhorizontal bedding further to the West, within the Kara shelf. Mesozoic folding in the North of the Kara Sea is expressed exclusively in a weak activation of movements along faults. At the neotectonic stage, the shelf near Severnaya Zemlya was raised and the Mesozoic complexes were eroded. The modern seismic activity of the North Zemlya shelf is associated with the ongoing formation of the continental margin.

Significance of Mineralogical and Lithologic-Petrographical Rank in the Ranking of Geological Information

2020 ◽  
Vol 42 (4) ◽  
pp. 33-49
Author(s):  
O.V. CHEPIZHKO ◽  
V.V. YANKO ◽  
V.M. KADURIN ◽  
I.M. NAUMKO ◽  
S.M. SHATALIN
Keyword(s):  
Fluid Flow ◽  
Black Sea ◽  
Bottom Sediments ◽  
Oil And Gas ◽  
Sedimentary Cover ◽  
Geochemical Characteristics ◽  
The Black Sea ◽  
Flow Parameters ◽  
Geochemical Parameters ◽  
Geological Information

For the first time the importance of mineralogical and lithological-petrographical ranks in the line of geological information ranks is substantiated for implementation of long-term forecasts, standard and non-standard approaches to research of physical and geochemical parameters as a basis of creation of complex system of forecast criteria and prospecting indicators of hydrocarbons within the sedimentary cover of Black sea based on the theory of global fluid-flows derivation. These criteria have different sensitivity to the object (hydrocarbon deposits) and are therefore ranked. The ranking determined the following parameters: 1) seismic data within the object, obtained by the method of deep seismic sounding, RWM SDP; 2) parameters of tectono-geodynamic structures; 3) the main characteristics of sedimentary cover and bedrock; 4) geochemical characteristics; 5) parameters of mineral complexes and fluid inclusions in mineral neoformations; 6) the value of the distribution of meiobenthos. Based on modern views of oil and gas geology, structural-tectonic and lithological-facies criteria are among the main ones. The study of the mineralogical component of sediments is made with using mineralogical, thermobarogeochemical and X-ray spectral methods. Fixation of anomalies of fluid flow at the bottom of the Black Sea as to the distribution of abiotic parameters in order to assess the prospects of oil and gas is determined by structural and tectonic features and high permeability of fluid flow; parameters of mineral complexes (minerals, facies) and genetic connections; heterogeneity of geochemical characteristics of bottom sediments; the presence of hydrocarbon inclusions in authigenic minerals of bottom sediments.

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