We have developed methodological techniques for studying the structure of intervals field on the basis of detailed correlation of well sections: selection of the most informative complex of well-log curves applied to geological conditions at each geological features; an initial allocation of solid intervals of the profile used as main and auxiliary markers, as if the grip is located between the pervious seams and streaks; tension and compression well-log curves; rendering reference intervals, limited to one or two well-log curves; sequential paleoprofeling repeated change of line of settlement, to ascertain the presence of specific changes in the context between the two adjacent lines of the comparison;
The first part explains the nature of formation of the upper Jurassic anomalous sections of the Bazhenov formation as the result of the accumulation of precipitation upon immersion of the individual blocks in considerationem faults with subsequent widespread precipitation accumulation actually Bazhenov formation, after which dip was involved previously stationary adjacent blocks with an offsetting limits on the accumulation of precipitation of the lower Cretaceous Achimov sequence, resulting in rocks of the Bazhenov formation actually are "upturned" over the anomalous sections, whereas the thickness of the Achimov bundle over the Bazhen proper is minimal.
In the second part, well sections of the lower Cretaceous Sortym formation were correlated between two parallel markers: the Georgievskaya formation and the Urievskaya unit; wells were grouped by section types in order to identify the block structure of the studied deposits; and correlation schemes were combined with seismic data.
Based on the developed methodological techniques for studying lower Cretaceous deposits, it is concluded that during their formation, vertical sinking of blocks along consedimentation faults and equal-speed deflection in the same time intervals caused the clinoform occurrence of rocks; the complex of studies allows us to assume the presence of oil-producing formations in the sedimentary column.
References
1. Gutman I.S., Saakyan M.I., Ursegov S.O. et al., Metodicheskie rekomendatsii k korrelyatsii razrezov skvazhin (Methodological recommendations for the correlation of well sections): edited by Gutman I.S., Moscow: Nedra Publ., 2013, 112 p.
2. Gutman I.S., Korrelyatsiya razrezov skvazhin slozhnopostroyennykh neftegazonosnykh ob”yektov na osnove innovatsionnykh tekhnologiy (Well log correlation for complex oil and gas bearing objects on the basis of innovative technologies), Moscow: Publ. of Gubkin Russian State University of Oil and Gas, 2011, 116 p.
3. Karogodin Yu.N., Glebov V.V., Ershov S.V., Kazanenkov V.A., Osobennosti stroeniya achimovskoy tolshchi neokoma Nizhnevartovskogo svoda v svyazi s dorazvedkoy mestorozhdeniy nefti i gaza (Features of the structure of the Achimov strata of the neocomian of the Nizhnevartovsk arch in connection with additional exploration of oil and gas fields), Collected papers “Geologiya i problemy poiskov novykh krupnykh mestorozhdeniy nefti i gaza v Sibiri (Rezul'taty rabot po Mezhvedomstvennoy regional'noy nauchnoy programme “Poisk” za 1994 g.) (Geology and problems of prospecting for new large oil and gas fields in Siberia (Results of work on the Interdepartmental Regional Scientific Program "Poisk" for 1994)), Part 1, 1996, pp. 102–107.
4. Gutman I.S., Kachkina E.A., Saakyan M.I., Skachek K.G., Abnormal sections of Bazhenov suite and Achimov clinoform respectively as a result of the fault tectonics and plicative (In Russ.), Nedropol'zovanie – KhKhI vek, 2016, no. 3 (60), pp. 72–83.
