METHOD TO DETECT SPATIAL DISTRIBUTION AND CONCENTRATION OF CLAY IN CORE SAMPLE Russian patent published in 2012 - IPC G01N23/83 

FIELD: measurement equipment.

SUBSTANCE: application: to detect spatial distribution and concentration of clay in a core sample. The invention concept is as follows: it consists in the fact that a contrast X-ray substance is pumped into a core sample, such as a water-soluble salt of metal with high atomic weight that enters into a selective ion-exchange reaction with clay, of the common formula: R⁺M^-, where R⁺ is selected from the group {Ba ⁺; Sr²⁺; Tl⁺; Rb⁺…}, M^- is selected from the group {Cl_n; NO_n; OH_n; CH₃COO, SO₄; …} in accordance with the table of solubility of inorganic substances in water, upon completion of the reaction of selective ion exchange, a non-contrast displacement agent is pumped into a sample, the sample is scanned by means of X-ray tomography, on the produced computer tomography image an area of interest and a reference section are identified, histograms are produced for grayscale in cross sections of the sample, and spatial distribution and concentration of clay are defined in the sample by means of analysis of histograms, starting from the reference section histogram.

EFFECT: higher spatial resolution and accuracy of detection of clay concentration and spatial distribution in a core sample.

4 cl, 3 dwg