FIELD: physics.
SUBSTANCE: group of inventions relates to geosteering in oil and gas exploration. Method for multi-sector correction of gamma-ray data obtained during drilling includes the following steps: dividing each sector of the gamma-ray image into a plurality of counting zones; counting the number of valid counting pulses for each counting zone in a given time interval during measurement while drilling; constructing a plurality of measurement vectors characterizing the measurement results in all sectors based on the value of the recorded amount for each counting area; construction of a correction matrix with a conditional number less than a given value, wherein said correction matrix is used to correct measurement data; calculation of gamma radiation intensity for each sector in which measurements were carried out, using a plurality of measurement vectors and the constructed correction matrix to correct the measurement data of each sector in which measurements were carried out for each given time interval.
EFFECT: high accuracy of gamma-ray images.
15 cl, 6 dwg
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