Use of lithofacies analysis in geomodeling of Bobrikovskian formation in Sirenevskoye oilfield

Most oilfields in the Republic of Tatarstan are currently nearly depleted. Assets of each oil and gas production facility include wells which are considered noncommercial due to complex geology and low reserves. Preparation of reserves and their development is a current challenge for geologists. This paper addresses application of conceptual geologic model of Bobrikovskian formation in Sirenevskoye oilfield to estimate reserves and further evaluate hydrodynamic model. Recreation of depositional environment has been achieved through lithofacies analysis.
Materials and methods
Well log interpretation, development database, Pascal programming language.
Results
Thus, the survey of the given area, based on electrometric data, Bobrikovskian formation core analysis data and fi d development performance has made it possible to defi and map sandbodies (facies zones) and study the pattern of lithological changes as well as thickness and properties of reservoir rocks. Furthermore, analysis of the field development through electrometric models suggested by V. Muromtsev has enabled to reveal favorable areas, which may contribute to production.
Сonclusions
Such technique of prompt local forecasting may be applied to a cluster of fields in the Republic of Tatarstan to determine lithological and deformational oil traps. This approach provides for more efficient well spacing at the exploration stage, which helps to reduce drilling costs or other expenses associated with application of diff ent survey methods for petroleum exploration.