Reserves probabilistic assessment approach for fluvial upper-middle Jurassic deposits in the northern part of Tazovsky peninsula

   Introduction. In recent years, oil & gas exploration process focus has shift ed towards clarifying the geological structure & resource potential of complex reservoirs. An example of these object types is Tyumen formation characterized by weak consistency, as well as a high heterogeneity and contrast properties.

   Aim. The aim is to develop an experimental approach of the resource potential probabilistic assessment of channel geobodies, considering the conceptual features.

   Materials and methods. This paper describes a methodology for estimating effective thicknesses based on a comprehensive analysis of G&G data with an emphasis on the bodies’ spatial structure analysis, considering the conceptual structure diff erentiation.

   Results. Multivariate calculation of effective thickness maps was performed in accordance with the developed methodology for considering the channel bodies’ diff erentiation. The results obtained were also compared with the assessment of effective channel thicknesses by morphometric analysis, and a high convergence of forecast values was noted using two different methods.

   Conclusion. Considering facies zoning with the involvement of sedimentation slices detailed analysis in the assessment process allowed us to obtain a correct eff ective volume forecast, in order to accurately plan perspective appraisal drilling.

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