The paper presents the results of studying the change in the oil saturation and porosity coefficients of the productive strata of the Underkirmaki suite (UKS) of the Binagadi field one hundred and ten years after the start of its development. Considering that practical methods for quantifying the current oil saturation factor in cased wells have not yet been developed, in the determinations, logging data and core data were mainly used for wells during their operation. Based on new data from correlated well sections the dependence of K_per on K_p was plotted for all reservoir intervals identified in the well sections. It has been established that there are no initial contours of oil content in the study area. To assess the influence of lithological features on the porosity and permeability properties of reservoirs, paired dependencies between K_per and K_p for the studied horizon were established. The resulting dependence is characterized by a high closeness of the relationship (R=0.85). In order to study the spatial distribution of reservoirs over the area (wells), as well as porosity, permeability and oil saturation, three-dimensional grids of the geomodel were created. As a result, a practical use of a petrophysical model is shown, the effectiveness of which lies in the fact that it is comparable with well log data, which makes it possible to dissect intervals where there are no well logs with great certainty.

Keywords: logging, well, porosity, permeability, electrical resistivity

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