The paper presents the results of constructing a facies model of the Neocomian deposits of the northern part of the Priobskoye oil field based on seismic facies analysis and interpretation of core and geophysical well information.
To obtain qualitative analysis results, an interpretation tool based on the technology of “neural networks” was used. A statistical approach is applied to determine the optimal number of seismic classes. The new lithological-facies model more accurately reflects the state of oil reserves, formed the basis of the geological representation of the structure of the field protected in 2020, was used in making design decisions, allowing to increase the dynamics of production.
Materials and methods
The site under consideration has been studied by 194 wells with core sampling and seismic surveys in the amount of more than 2 800 km². The software of the three-dimensional seismostratigraphic interpretation of Stratimagic by Paradigm company was used to carry out
seismic facies analysis for the target interval of Cretaceous sediments. The materials of works  and  describing the regional development of Mesozoic-Cenozoic deposits on the territory of the Priobskaya oil and gas bearing zone were involved.
facies sedimentation conditions, clinoform deposits, seismofacial analysis, core, GIS, attribute analysis