Abstract
The developed transition saturation zone and the presence of free water above the accepted level of OWC, which is usually characterized by undersaturated reservoirs, greatly complicates the development of deposits and requires updating the geological model based not only on the standard partition of the lithotype section according to well log data, but also involving the results of core material research.
The aim of this work is to interpret well logging data using rock typing in the conditions of a developed transitional saturation zone and the presence of free water above the accepted OWC level. The work was carried out in one of the Western Siberia oil fields in the Upper-Middle Jurassic terrigenous sediments. The work is based on a comparison of interpretation algorithms based on a standard approach and on the basis of building flexible interpretation algorithms and creating an interactive system of petrophysical modeling. In addition, intermediate conclusions will be shown, such as the use of a calibrated fluid model based on special core studies data for standard log data for drilling horizontal and pilot shafts. Comparison of the core data results interpretation and the petrophysical model constructed by the volumetric method.
