Seismiofacies and petrofacial modeling of the Sigovskaya formation as a tool for removing uncertainties in the construction of a 3D geological model of the reservoir

Abstract

Reliable seismic facies and petrofacial models are a tool for removing uncertainties in the construction of a 3D geological model of a reservoir. In recent years, Gazprom Neft PJSC has confirmed the high efficiency of petrofacial modeling. Owing to the developed technology, the informativity of the complex of geophysical research of wells has increased significantly. A wide range of geological and petrophysical information allows to create a more detailed geological model of the field and reasonably develop optimal solutions for the development of productive hydrocarbon deposits. The success of petrofacial modeling and providing a well log interpretation methodology depends on the presence of a relationship between reservoir properties of the unit and depositional environments. To reduce uncertainties in the assessment of reservoirs, it is necessary to refine the existing ideas about the geological and facies architecture of oil-field. The refinement of the lithofacies reservoir model based on new data helps to localize the position of sand bodies with improved filtration and reservoir properties of the rocks.