Characteristic aspects of the Cenomanian deposits on the exampleof Russkoye field

Authors: А.I. Kudamanov, А.S. Potapova, Т.M. Karikh (TNNC LLC, RF, Tyumen)

Key words: the Cenomanian, Russkoye field, incised valleys, microscopic lamina, permeability, heterolyte filling, tidal flats, sand storms.

The major reserves of Russkoye field relate to the Cenomanian formations PK1-7 of pokurskaya suite that is characterized by a complex structure. That is determined by facies environment and uneven development of secondary processes. The integrated core study allowed specifying the Cenomanian deposition nature and determining within the field an “odd” different from the other in Western Siberia type of clastic reservoir. The “odd” type is represented by coarse-fine grained shaly (shale content is 12-20%) and sand (12-20% as well) silt stones in the deposits of heterolyte filling of tidal flats. The “odd” nature of deposits is determined by sand material localization as thin lenticular lamina (0.1-3.0 mm; up to 30-40 % for rock) with sharp boundaries and high permeability along the layers. The formation of shaly siltstones with sandy lamina relates supposedly to drought periods and eolation activation which lead to sand storms on the territory of tidal flats. 

1. The explanatory note to the “Atlas litologo-paleogeograficheskikh kart
yurskogo i melovogo periodov Zapadno-Sibirskoy ravniny v masshtabe
1:5000000” (Atlas of the lithologic and paleogeographic maps of the Jurassic
and Cretaceous periods of the West Siberian Plain on the scale 1:5,000,000):
edited by Nesterov I.I., Tyumen': Publ. of ZapSibNIGNI, 1976, V. 93.
2. Klimat v epokhi krupnykh biosfernykh perestroek (The climate of the era of
large-scale rearrangements of Biosphere): edited by Semikhatov M.A., Chumakov
N.M., Moscow: Nauka Publ., 2004, 299 p.
3. Saks V.N., Ronkina Z.Z., Proceedings of Institute of Arctic Geology of the Ministry of Geology and mineral resources of the USSR, 1957, V. 90, 232 p.
4. Baraboshkin E.Yu., Prakticheskaya sedimentologiya (terrigennye kollektory)
(Practical sedimentology (clastic reservoirs)), Tomsk: Publ. of Tomsk Polytechnic
University, 2007, 154 p.

To buy the complete text of article (a format - PDF) or to read the material which is in open access only the authorized visitors of the website can. .

Mobile applications

Read our magazine on mobile devices

Загрузить в Google play

Press Releases