ABOUT DECISION OF TASKS OF THE FLUID FILT RATION THROUGH POROUS-MEDIABY FUZZY MATHEMATICS

One of the main problems of reservoir engineering is uncertainties in geologic parameters. Evaluation of influence of geologic data' uncerta inties to the final technologic parameters is an actual problem. This article describes a new mathematical approach - fuzzy mathematics whic h deals with ''fuzziness'' of numbers and intervals. It is shown that even 1% uncertainty in geologic parameters is a very critical for fina l estimation of oil recovery factor. Given are fuzzy phase permeabilit ies, Buckley-Leverett' function and its derivative for 1, 5 and 10% un certainty in geologic parameters.