Lithofacies interpretation at the upper part of the Pokurskaya formation in the Cenomanian succession, the north of the West Siberian Basin
The lithofacies of the Cenomanian succession within a gas field in the north of the West Siberian basin were studied using well log information especially spontaneous potential log to determine the lithostratigraphy, hydrodynamic characteristics, possible reservoir sands and depositional environment of the study area for opportunities that will support the exploration program. Geophysical well logs from six profile wells were used for this study. The lithostratigraphic model and sequence-stratigraphic frame were developed using spontaneous potential log curves to identify lithic units like sand, silt and mud. The depositional environments penetrated by the wells interpreted from log signatures gave four main types of lithofacies: Foreshore, Regressive Shoreface; Transgressive Shoreface; Discontinuous Currents were recognized from the stacking patterns of the spontaneous potential curves by modified electro facies classification. The stratigraphic column of the wells was subdivided into parasequences composing four sequences within the regional stratigraphic trend.
- Kontorovich A. E., Ershov S. V., Kazanenkov V. A., Karogodin Y. N., Kontorovich V. A., Lebedeva N. K., Nikitenko B. L., Popova N. I., Shurygin B. N. Cretaceous paleogeography of the West Siberian sedimentary basin. Russian Geology and Geophysics, 2014, vol. 55, no. 5–6, pp. 582–609. https://doi.org/10.1016/j.rgg.2014.05.005
- Selley R. C. Concepts and methods of subsurface analysis. AAPG Continuing Education Course Notes Series. Tulsa, Oklahoma, American Association of Petroleum Geologists, 1979, vol. 9, 82 p. https://doi.org/10.1306/CE9397
- Muromtzev V. S. Electrometric geology of sand bodieslithological traps of oil and gas. Leningrad, Nedra Publ., 1984. 260 p. (in Russian).
- Walker R. G., James N. P. Facies models: Response to sea level change. Stittsville, Ontario, Geological Association of Canada, Love Printing Service Ltd., 1992. 407 p.
- Chow J. J., Ming-Ching Li., Fuh S. C. Geophysical well log study on the paleoenvironment of the hydrocarbon producing zones in the Erchungchi Formation, Hsinyin, SW Taiwan. TAO : Terrestrial, Atmospheric and Oceanic Sciences, 2005, vol. 16, no. 3, pp. 531–543. https://doi.org/10.3319/TAO.2005.16.3.531(T)
- Siddiqui N. A., EL-Ghali M. A., bin Abd Rahman A. H., Mijinyawa A., Ben-Awuah J. Depositional environment of shallow-marine sandstones from outcrop gamma-ray logs, Belait Formation, Meragang Beach, Brunei Darussalam. Research Journal of Environmental and Earth Sciences, 2013, vol. 5, no. 6, pp. 305–324. https://doi.org/10.19026/rjees.5.5705
- Catuneanu O. Principles of Sequence Stratigraphy. Geological Magazine, 2007, vol. 144, iss. 6, pp. 1031–1032. https://doi.org/10.1017/S0016756807003627
- Van Wagoner J. C., Mitchum R. M., Campion K. M., Rahmanian V. D. Siliciclastic sequence stratigraphy in well logs, cores, and outcrops : Concepts for high-resolution correlation of time and facies. AAPG Methods in Exploration Series. Tulsa, Oklahoma, American Association of Petroleum Geologists, 1990, vol. 7. 55 p. https://doi.org/10.1306/Mth7510
- Zunde D. A. Methods for constructing a sequence-stratigraphic model of the Pokurskaya suite. Oilfield Engineering, 2015, no. 5, pp. 54–59 (in Russian).
- Alexandrova G. N., Kosmynin V. A., Postnikov A. V. Stratigraphy and sedimentation conditions of Cretaceous deposits in the southern part of the Varyogan mega-shaft (Western Siberia). Stratigraphy. Geological Correlation, 2010, vol. 18, no. 4, pp. 65–91 (in Russian).
- Ulmishek G. F. Petroleum Geology and Resources of the West Siberian Basin, Russia. Reston, Virginia, US Department of the Interior, US Geological Survey, 2003. 49 p. https://doi.org/10.3133/b2201G
- Kontorovich A. E., Nesterov I. I., Salmanov F. K., Surkov V. S., Trofimuk A. A., Erv’ye Yu. G. Petroleum Geology of West Siberia. Moscow, Nedra Publ., 1975. 679 p. (in Russian).
- Lapkovsky V. V., Istomin A. V., Kontorovich V. A., Berdov V. A. Correlation of well logs as a multidimensional optimization problem. Russian Geology and Geophysics, 2015, vol. 56, no. 3, pp. 487–492. https://doi.org/10.1016/j.rgg.2015.02.009
- Yasamanov N. A. Mesozoic and Cenozoic Climates and Landscapes of West and Central Siberia (Paleogeographic Factors of Bauxite Accumulation). Moscow, Nedra Publ., 1976. 142 p. (in Russian).
- Potapova E. A. Implementation of a sequence-stratigraphic approach to clarify the correlation of clinoform formations of the BU group on the southeastern slope of the Srednemessoyakhsky swell. Geology, Geophysics and Development of Oil and Gas Fields, 2015, no. 7, pp. 22–29 (in Russian).