METHOD FOR DETECTION OF GEOLOGICAL PROPERTIES OF TERRIGENOUS ROCK Russian patent published in 2010 - IPC E21B49/00 

FIELD: mining.

SUBSTANCE: method includes geophysical surveys of wells, identification of filtration-capacitance properties in core (Kp - porosity, Kper - absolute permeability) of rocks opened by well, processing of all the information obtained with assessment of geological properties and further extraction of collector intervals. Rock is modeled as a structural frame with various dimensions of porous channels that shape pore space. Using above-mentioned representations, shape of rock geological properties reflection is determined into its petrophysical properties depending on values of pore radiuses and ranges of porosity variation, petrophysical models of rock geological properties reflection are established. In process of geophysical surveys of well cuts rock porosity (Kp) is defined in open boreholes. Based on application of petrophysical models of rock geological properties reflection, absolute permeability (Kper) is calculated in each well for each bed, taking into account geometry of pore space of rock, which is an index of structural-mineralogical heterogeneity of geological medium, its filtration-capacitance properties, absolute and phase permeability.

EFFECT: detection of geological properties of terrigenous rocks.

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