SILURIAN REEF OF THE LEDYANSK UPLIFT AS A POTENTIAL RESERVOIR OF HYDROCARBONS IN THE NORTH OF THE SIBERIAN PLATFORM

2020 ◽  
pp. 13-22
Author(s):  
I. A. Varaksina ◽  
Keyword(s):  
Siberian Platform ◽  
Oil And Gas ◽  
High Capacity ◽  
Reservoir Properties ◽  
The North ◽  
Formation Stage ◽  
Potential Reservoir ◽  
Upper Silurian ◽  
Primary Porosity ◽  
Gas Potential

The results of the lithological study of the Silurian sediments drilled in by wells within the Ledyansk uplift in the north of the Siberian platform are presented. It is found that in the early Silurian time on the territory under consideration a large organogenic buildup corresponding to typical Silurian reefs of a stable shelf was formed, the formation stage of its framework was confined to Wenlock. In Late Silurian, against the background of regression, the reef formations were overlain by lagoon-sebkha clayey-evaporite deposits. It is shown that the heterogeneity of the section affected the distribution of reservoir properties. The high primary porosity of the reef framework contributed to the processes of dissolution, stylolization, fracturing and formation of a high-capacity reservoir. The combination of various voids led to the development of a complex reservoir. The saline-sulfate rocks of the Upper Silurian – Lower Devonian act as a seal. The question of the prospects for the oil and gas potential of the Silurian reef deposits is of particular relevance in view of the wholesale development of organogenic buildups on the Siberian platform in the Wenlock time.

scholarly journals The oil and gas potential of the north of the Siberian platform and adjacent shelf

2021 ◽  
Vol 1201 (1) ◽  
pp. 012076
Author(s):  
A N Dmitrievskiy ◽  
N A Eremin ◽  
N A Shabalin ◽  
I K Basnieva ◽  
A T Kondratyuk
Keyword(s):  
Siberian Platform ◽  
Seismic Data ◽  
Oil And Gas ◽  
Deep Structure ◽  
The Arctic ◽  
The North ◽  
Common Depth Point ◽  
Oil And Gas Resources ◽  
The Common ◽  
Gas Potential

Abstract The objective of this article is an estimation of the oil and gas potential of the north of the Siberian platform and adjacent shelf. The Siberian platform is characterized by a large concentration of oil and gas resources in the southern and central parts of the platform. The main oil and gas province of the Siberian Platform is the Leno-Tungus oil and gas province. The oil- bearing strata in the Lena-Tungus oil and gas province are confined to the Riphean, Vendian, Lower-Middle Cambrian deposits, in which large oil and gas fields are discovered. In modern contours the Siberian platform in the north and north-west is fringed by the Yenisei-Khatanga regional trough. In the east, the Yenisei-Khatanga regional trough is connected with the Anabar- Lena trough, framing the north-eastern part of the Siberian platform. Analysis of the available geological and geophysical materials shows a fairly high potential of the Anabar-Lena and Yenisei-Khatanga troughs for the discovery of large hydrocarbon fields. The basic understanding of the geologic-tectonic structure and petroleum potential of the northern part of the Siberian Platform and the adjacent shelf of the Arctic zone are currently based on seismic data by the method of the common depth point (CDP), tied to the existing deep search and parametric wells. Representations of the deep structure and oil and gas potential of specific areas, the allocation of targeted promising oil and gas horizons can change dramatically as the depth of seismic acquisition of the method of the common depth point increases and the software for processing and interpreting seismic data is improved. The localized oil and gas resources of the north of the Siberian platform and adjacent shelf are 41017,3, subsequently, 27582,3 - onshore and offshore - 13435 MMT (million tons) of oil equivalent.

scholarly journals Geodynamics and Oil and Gas Potential of the Yenisei-Khatanga Basin (Polar Siberia)

Minerals ◽  
2018 ◽  
Vol 8 (11) ◽  
pp. 510 ◽  
Author(s):  
Valery Vernikovsky ◽  
Georgy Shemin ◽  
Evgeny Deev ◽  
Dmitry Metelkin ◽  
Nikolay Matushkin ◽  
...  
Keyword(s):  
Lower Cretaceous ◽  
Oil And Gas ◽  
Foreland Basin ◽  
Gas Reservoirs ◽  
The North ◽  
Western Arctic ◽  
Folded Structures ◽  
Gas Potential ◽  
First Time ◽  
North Western

The geodynamic development of the north–western (Arctic) margin of the Siberian craton is comprehensively analyzed for the first time based on our database as well as on the analysis of published material, from Precambrian-Paleozoic and Mesozoic folded structures to the formation of the Mesozoic-Cenozoic Yenisei-Khatanga sedimentary basin. We identify the main stages of the region’s tectonic evolution related to collision and accretion processes, mainly subduction and rifting. It is demonstrated that the prototype of the Yenisei-Khatanga basin was a wide late Paleozoic foreland basin that extended from Southern Taimyr to the Tunguska syneclise and deepened towards Taimyr. The formation of the Yenisei-Khatanga basin, as well as of the West-Siberian basin, was due to continental rifting in the Permian-Triassic. The study describes the main oil and gas generating deposits of the basin, which are mainly Jurassic and Lower Cretaceous mudstones. It is shown that the Lower Cretaceous deposits contain 90% of known hydrocarbon reserves. These are mostly stacked reservoirs with gas, gas condensate and condensate with rims. The study also presents data on oil and gas reservoirs, plays and seals in the Triassic, Jurassic and Cretaceous complexes.

A comprehensive analysis of conditions and features of oil-and-gas content within the Akhlovskaya structural zone (the North Caucasus)

2021 ◽  
pp. 25-38
Author(s):  
I. I. Bosikov ◽  
A. I. Mazko ◽  
A. V. Mayer ◽  
O. V. Gagarina
Keyword(s):  
Oil And Gas ◽  
Gas Content ◽  
North Caucasus ◽  
Reservoir Properties ◽  
Resource Base ◽  
Entire Area ◽  
The North ◽  
Urgent Task ◽  
Porosity Coefficient ◽  
Saturated Thickness

At the present stage, the development of the oil industry of the Russian Federation is impossible without replenishing the resource base, and therefore an urgent task is to analyze and assess the conditions and characteristics of oil-andgas content in unexplored regions.Purpose of the study is an analysis and an assessment of reservoir properties of rocks of the Aptian horizon Р1+2- К2 within the Akhlovskaya structure.We analyzed the graphs of the distribution of indicators in wells R-212 and R-213 in the Akhlovsky area and concluded that the reservoir is heterogeneous, and there are interlayers of mudstones with other reservoir properties and geophysical characteristics. The following pairs of parameters (porosity coefficient and oil-saturated thickness of rocks, rock resistivity and porosity coefficient, rock resistivity and oil-saturated thickness of rocks) have a significant positive correlation. Having studied the distribution of indicators in the Akhlovsky area for wells R-212 and R-213 along one horizon, we concluded that these indicators differ very slightly, which indicates the homogeneity of the reservoir properties. Qualitative indicators Qualitative indicators don't change. Thus, we can expect similar indicators within the entire area of the explored layer Р1+2- К2 in the territory of the Akhlovsky area.

scholarly journals Silurian biostratigraphy: revision of the North Atlantic Realm in the Llandovery

1979 ◽  
Vol 91 ◽  
pp. 57-60
Author(s):  
A.J Boucot ◽  
J.M Hurst
Keyword(s):  
North Atlantic ◽  
Siberian Platform ◽  
Middle Devonian ◽  
North Atlantic Region ◽  
Atlantic Region ◽  
The North ◽  
Lower Ordovician ◽  
The North Atlantic ◽  
Upper Silurian ◽  
North Greenland

Llandovery faunas have been considered more cosmopolitan than any others during the Lower Ordovician - Middle Devonian with only two undivided biogeographic Realms, the North Atlantic and Malvinokaffric, being recognised. Endemie pentameroids known from the Ashgill - Middle Llandovery of the Uralian region, Siberian Platform and adjacent Sette Daban occur commonly in North Greenland. Thus, during this time and in biofacies rich in pentameroids, the North Atlantic Realm appears divisible into a North Atlantic Region and a Uralian-Cordilleran Region, as in the Upper Silurian.

scholarly journals ASSESSMENT OF THE OIL AND GAS POTENTIAL OF THE PRE-JURASSIC COMPLEX

2021 ◽  
Author(s):  
К.В. Емельянов ◽  
П.С. Гребнев ◽  
В.Р. Яппаров ◽  
А.М-Э. Абумуслимов
Keyword(s):  
Western Siberia ◽  
Oil And Gas ◽  
The North ◽  
Gas Potential

В статье рассмотрены перспективы изучения Доюрского комплекса на Севере Западной Сибири, а также результаты испытаний ДЮК в регионе деятельности «Мегионнефтегаза». The article considers the prospects of studying the pre-jurrasic complex in the North of Western Siberia, as well as the results of the tests of DUK in the region of activity called the «Me- gionneftegaz».

UPPER PERMIAN CARBONATE RESERVOIRS OF THE NORTH WEST SHELF AND NORTHERN PERTH BASIN, AUSTRALIA

1999 ◽  
Vol 39 (1) ◽  
pp. 343 ◽  
Author(s):  
J.D. Gorter ◽  
J.M. Davies
Keyword(s):  
Oil And Gas ◽  
Upper Permian ◽  
Gas Reservoirs ◽  
Secondary Porosity ◽  
North West ◽  
Associated Gas ◽  
The North ◽  
Timor Sea ◽  
Primary Porosity ◽  
Carnarvon Basin

The Perth, Carnarvon, Browse, and Bonaparte basins contain Permian shallowmarine carbonates. Interbedded with clastic oil and gas reservoirs in the northern Perth Basin (Wagina Formation), and gas reservoirs in the Bonaparte Basin (Cape Hay and Tern formations), these carbonates also have the potential to contain significant hydrocarbon reservoirs. Limestone porosity may be related to the primary depositional fabric, or secondary processes such as dolomitisation, karstification, and fracturing. However, in the Upper Permian interval of the North West Shelf and northern Perth Basin, where there are no indications of significant preserved primary porosity in the limestones, all known permeable zones are associated with secondary porosity. Fractured Permian carbonates have the greatest reservoir potential in the Timor Sea. Tests of fractured Pearce Formation limestones in Kelp Deep–1 produced significant quantities of gas, and a test of fractured Dombey Formation limestone in Osprey–1 flowed significant quantities of water and associated gas. Minor fracture porosity was associated with gas shows in dolomitic limestones in Fennel–1 in the Carnarvon Basin, and fractures enhance the reservoir in the Woodada Field in the northern Perth Basin. Karst formation at sub-aerial unconformities can lead to the development of secondary porosity and caverns, as in the Carnarvon Basin around Dillson–1. Minor karst is also developed at the top Dombey Formation unconformity surface in the Timor Sea region.

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