Forecast of current oil saturation based on nuclear physical log data of surrounded wells

One of the most important problem of geoscientists and engineers faced on is connected with revealing of additional sources of hydrocarbons in the matured oil fields, which can be recovered with less expenses. Carbon/Oxygen logging (COR) in the cased wells is considered to be among the most effective methods of additional reserves discovery in such oil fields. However application of impulse neutron logging is not always applicable due to the technical reasons and demand of additional expenditures. New method where gridding-interpolation algorithm is used to forecast current oil saturation is proposed in the paper. The method was successfully used in Western Siberia oil fields.