METHOD FOR INCREASING RELIABILITY OF GEOPHYSICAL SURVEY DATA INTERPRETATION IN WELLS DUE TO CLAY CAKE FORMATION AND GROWTH PROCESS MODELLING Russian patent published in 2025 - IPC G01N15/08 E21B47/00 

FIELD: measuring.

SUBSTANCE: invention relates to petrophysical analysis of core and can be used to increase reliability of logging data interpretation. Collector filtration-capacitance properties determining method includes the clay cake formation experimental works performance in close to the reservoir conditions, on the core samples with the characteristic for the investigated formation filtration-capacitance properties, using the original drilling fluid or similar, using the installation simulating the well drilling conditions, in particular the drilling fluid constant circulation; differential pressure characteristic for the well under study; temperature measurement, which allows to take into account its effect on the viscosity of the filtered liquid, calculation of the porosity and permeability of the clay cake, use of the obtained petrophysical characteristics to determine filtration-capacitance properties of the collector and study colmatage properties of the drilling fluid when interpreting geophysical survey data in wells based on a multiphysical formation model. At that, when calculating permeability of clay cake, experimentally measured permeability of colmataged sample is taken into account.

EFFECT: improving reliable determination of filtration-capacitance properties of a collector.

1 cl, 6 dwg, 4 tbl