METHOD FOR WELL INVESTIGATION USING METHODS FOR DETERMINING AMOUNT OF RESIDUAL EXTRACTED RESERVES OF DEVELOPED DEPOSIT Russian patent published in 2013 - IPC E21B49/00 G01V8/00 

FIELD: oil and gas industry.

SUBSTANCE: method involves oil sampling, determination of optical properties of samples in visible part of spectrum at different wave lengths under laboratory conditions, statistical processing of obtained data and correlation of field and laboratory data. Based on laboratory investigations and considering the determined relationships, residual extracted oil reserves are calculated. Statistical processing and correlation of field and laboratory data consists in calculations of root-mean-square values, dispersion and variation coefficients of light absorption factor K_la as per a mathematical formula. At complex data interpretation there has been found out dependence of variation coefficient K_la on accumulated oil production in the form of linear regression presented by mathematical formula.

EFFECT: obtaining objective data on physical and chemical properties of produced oil, and namely optical properties for calculation of residual extracted oil reserves and determination of current properties of manifolds of the developed deposit, as well as data on flooding of well products under field conditions.

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