METHOD AND SYSTEM FOR MULTI-SECTOR CORRECTION OF GAMMA-RAY IMAGE DATA OBTAINED DURING DRILLING Russian patent published in 2025 - IPC G01V5/12 E21B47/22 

Abstract RU 2839038 C1

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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RU 2 839 038 C1

Authors

Din, Luyan

Yan, Ninnin

Tan, Khajtsyuan

Yan, Chzhen

Lin, Nan

Khuan, Mintsyuan

Lyu, Tsinlun

Yan, Tsyuantszin

Chzhan, Syaolin

Chzhan, Chzhiyun

Khan, Chuntyan

Ma, Khaj

Tsuj, Syaokhuej

Lu, Chao

Chen, Sin

Dates

2025-04-25Published

2021-10-15Filed