METHOD OF DETECTION OF PRODUCTIVE COLLECTORS AND DETERMINATION OF POROSITY THEREOF IN DEPOSITS OF BAZHENOV FORMATION Russian patent published in 2008 - IPC G01V5/14 

FIELD: mining.

SUBSTANCE: specimens of cores are sampled from key wells, the specimens are studied for the content of the clay fraction and the solid organic substance, neutron and lateral logging is conducted; the content of all rock-forming minerals, element composition, the content of organic substance, distribution of atoms of uranium by slides sampled in the whole shaft of each key well are determined additionally on all core specimens taken from key wells and the three-dimensional mineral-component model of deposits of the Bazhenov formation is formed with determination of petrophysical characteristics of all components of this model; besides spectrometric gamma ray logging is performed additionally in each well investigated for determination of concentrations of potassium, uranium, thorium, next the correlation curve of hydrogen content determined by gamma ray logging against uranium content determined by spectrometric gamma ray logging is plotted, the correlation between uranium content and hydrogen content in solid organic substance and correlation between total emission of potassium and thorium and hydrogen content by neutron logging with the deduction of hydrogen content in solid organic substance is determined, next basing on the correlations obtained porosity of deposits of the Bazhenov formation is determined and productivity of collectors in deposits of the Bazhenov formation is evaluated.

EFFECT: reliable determination of productive intervals in accordance with actual availability of the collector and increased accuracy of determination of the density factor in deposits of the Bazhenov formation.

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