... Formation top to the rocks of the sub-Achimov member, but also to propose the criteria for delineating the upper boundary in the central regions of the West Siberian sedimentary basin within the Khentei hemianteclise, the South Nadym megamonoclise and the Mansi syneclise. Four members are distinguished...

...V.G. Eder; A.G. Zamirailova; P.A. Yan Abstract Based on results of comprehensive lithological and geochemical analysis, we have established the regularities of the spatial distribution of major rock-forming components of the Bazhenov Formation in the West Siberian Basin (WSB), namely, siliceous...

...V.A. Kontorovich; D.V. Ayunova; I.A. Gubin; S.V. Ershov; A.Yu. Kalinin; L.M. Kalinina; M.S. Kanakov; M.V. Solov’ev; E.S. Surikova; N.I. Shestakova Abstract The study presents a seismic and geological characterization of the Meso-Cenozoic sedimentary cover of the Nadym–Pur interfluve area...

...Fig. 2. Total salinity (TDS) of groundwaters in the Oxfordian regional reservoir, Nadym–Taz interfluve. 1–5, boundaries of West Siberian basin (1), Jurassic sedimentary basin (2), Inner area and Outer belt (3), Yamal–Kara basin (4), clay alteration of Oxfordian regional reservoir (5); 6...

... and mixing at depth are responsible for the character of direct, inverse, or more intricate hydrogeochemical zoning in the region. The nature of vertical hydrogeochemical zoning of petroliferous basins has recently been a focus of study. The particular interest to the West Siberian artesian basin is due...

...) parts. Structurally, the deepest central part of the Nadym-Taz interfluve extends submeridionally and is connected with a system of megatroughs (Mid-Pur, Yarainer-Etypur, Upper-Agan, Pyakupur-Amput) and megabasins (Nerut’, Bol’shaya Kheta, Lower Taz, and Taz, with its complicating Upper-Tanlov basin...

... regional reservoirs: Toarcian, Pliensbachian, and Hettangian-Sinemurian (see Fig. 2 ). Reservoir sealing bed permeable complex catagenesis source beds reservoir rocks porosity permeability oil potential The Lower-Jurassic deposits in the Nadym-Taz interfluve in the north of the West...

... contact, resulting from cooling of the oil- and gas-saturated reservoir. Prospects for discovery of pools screened by second-kind capillary barriers are discussed. The Jurassic and Neocomian deposits in the Nadym region are characterized by optimal conditions for the development of second-kind capillary...

... J 2 , one of the most promising parts of the Lower-Middle Jurassic section are discussed in this paper. The area under consideration (about 16,000 km 2 ) occupies the southern flank of the Nadym megadepression in the north, the northern subduction zone of the North-Surgut monocline in the south...

... that these glacial formations are represented by subaerial forms. They were left by a glacier whose margin was situated on land and, when hypsometrically below 125 m, in a shallow-water near-glacier lacustrine basin (Mansi). Well-preserved glacier forms, moraines lying immediately on the surface, and no boulderless...

..., assigned to the Turonian. Fields of oil, condensate, and fat gas were discovered in the underlying Jurassic, Neocomian, and Aptian–Albian sediments. The principal reserves of Cenomanian gas are concentrated in the Urengoi and Nadym districts of the Nadym–Pur petroliferous region (PR). By now, more...

... that the level of OM maturity ubiquitously increases with depth, but the rate (gradient) of these changes varies throughout the basin. Four regions with different deep zoning of catagenesis were distinguished: Yamal, Gyda, Nadym-Pur, and Pur-Taz (see Fig. 3 ). Analytical expressions showing the relationship...

...P.A. Yan The structure, composition, and deposition environments of Callovian-Oxfordian strata in the Nadym-Taz interfluve are analyzed on the basis of deep drilling data from the Tyumen’ SDB-6. Depositional and sequence stratigraphy modeling reconstructs coastal and shelf conditions...

...Figure 3. Map shows the location of the Nadym–Pur, Pur–Taz, and Middle Ob regions; oil fields; and gas fields in the West Siberian basin from which 37 oil samples were selected for biomarker, quantitative diamondoid, and compound-specific isotopic analyses. Circle, triangle, rhombus, and star...

...V.A. Kazanenkov; A.R. Kurchikov; A.G. Plavnik; M.N. Shaporina Abstract —The paper considers present-day rock temperature distribution in the top of the Tyumen and Malyshevka Formations throughout the West Siberian sedimentary basin. A temperature variations map based on earlier and newly obtained...

... a large zone of low MC 3 1 ( R vt 0 = 1.20–1.24%) in the northern Nadym semisyncline (Nadym, Kheiga, and Mar’yino areas), which almost fully covers the Upper Tanlovo basin. Small zones of MC 3 1 maturity grade are inferred in the western Neruta depression...

... in combination traps. In about 50% of all reservoirs in the Nadym-Pur district, oil constitutes a rim on a gas/condensate reservoir (Dikenshteyn et al, 1977). The Pokur Suite is productive in all fields in the Purpey region except the Yarayner oil field. This part of the northern basin is primarily massive...