... of this interval is the upper part of the Bazhenov Formation overlapped by the Sortym Formation. 8 5 2001 © 2002 UIGGM, SIBERIAN BRANCH OF THE RAS 2002 UIGGM, SIBERIAN BRANCH OF THE RAS Upper Jurassic and Callovian stratigraphy lithology ammonites bivalves microfauna spores and pollen...

...Fig. 1. Water chemistry division of eastern part of Neocomian reservoirs. 1 , wells; 2 , region boundaries; 3 , regional mineralization contour line (10 g/l); 4 , boundaries of stratigraphic units: Akha and Sortym ( a ), Sortym and Megion ( b ), Sangopai and Cherkashino ( c ), Cherkashino...

..., siliceous, shales of the Bazhenovo Formation was followed by accumulation of the condensed, thinly laminated, organic-lean clays of the sub-Achimov succession (Akh, Sortym, Megion, and Shuratov Formations). The Achimov base-of-slope beds composed of lenticular sands and silts were deposited as basin-floor...

...- and 1,6-dimethylnaphthalenes being predominant ( Fig. 4 a ). alkylnaphthalenes composition distribution oil geochemical parameters method of principal components Aromatic hydrocarbons (HCs) play a significant role in the formation of naphthides; therefore, data on their composition can...

... , Diffraction analysis for the Sortym Formation using vertical seismic profiling data : Journal of Seismic Exploration , 23 , 463 – 480 . 0963-0651 Koren Z. Ravve I. , 2011 , Full-azimuth subsurface angle domain wavefield decomposition and imaging Part I: Directional and reflection image...

... seismic profiles with deep wells; 5 , boundaries of formations: 1, Tanopcha, Akh; 2, Malaya Kheta, Baikalovskaya, Shuratovskaya; 3, Malaya Kheta, Sukhaya Dudinka, Nizhnyaya Kheta; 4, Severnaya Sos’va, Ulansyn, Kharasoim, 5, Koshai, Leushinka, Alyasov, Tutleim; 6, Tangalov, Sortym; 7, Malaya Kheta...

... Complexes Parameter Aquifer complexes Aptian-Albian-Cenomanian Neocomian Upper Jurassic Lower-Middle Jurassic Pokur Formation Tangala and Sortym Formations and their age analogs Yanov Stan and Vasyugan Formations and their age analogs Tyumen’, Kotukhta, Yagel’naya, and Beregovaya...

...), and massive structural pools predominate ( Ermilov et al., 2004 ; Kontorovich et al., 1975 ). The Berriasian–Lower Aptian ( Neocomian ) megacomplex , which overlies the Jurassic sediments, includes the sediments of the Sortym and Tangalova Formations in the study area. Its base is controlled...

... the top of the Lower Hauterivian Seyakha member in the southeast to the lowermost Barremian in the northwest of the Gydan subregion. In adjacent areas of the Gydan Peninsula, the Berriasian–Lower Aptian section is subdivided into the Sortym and Tangalov Formations in the Urengoi–Purpe region...

... Formation in the Poykin 51 (Neocomian), Nizhne-Sortym 208, and Itur 80 (Berriasian-Valanginian) do not represent source rocks because of low TOC (0.34 to 0.49 wt.%) and low oil-generative potential (HI less than 106 mg HC/g TOC) ( Figure 5 ). An Upper Jurassic Bazhenov rock sample ( Figure 4 ) from...

...) is traceable at the base of the Neocomian in all the regions. This is a few tens of meters in thickness and is made up of bituminous mudstones. Above the Bazhenov Formation, the Akh, Sortym, and Megion Formations (upper Berriasian – lower Hauterivian) are recognized in each of the structure-facies zones...

... oils show geochemical characteristics that suggest they were derived from clastic-rich lacustrine or nearshore marine source rocks dominated by terrigenous higher plant input like those in the Lower to Middle Jurassic Tyumen Formation, although no correlation was observed between the oils and a single...

... is overlapped (in the absence of unconformity) with the deposits of the Neocomian clinoform complex, such as argillaceous rocks of the sub-Achimov member and the lower parts of the Akhsk and the Sortym formations ( Naumov, 1977 ; Zhamoida and Petrov, 2008 ). The width of these deposits varies over a wide range...

... structure is typical of the Kulomzino, Megion, Sortym, and Akh Formations. Crustal isostasy is observed not only now. According to laws of physics, they also took place in the geologic past, including the Mesozoic in West Siberia. Some researchers ( Igoshkin and Shlezinger, 1990 ; Kovylin et al., 1998...