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A Minicomputer-based Differential Method of Interpretation of Gamma-ray Logs by a Modified Deconvolution Technique

By
Qin Jigeng
Qin Jigeng
Beijing Research Institute of Uranium Geology, Ministry of Nuclear Industry, Beijing
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Tan Qingjiang
Tan Qingjiang
Beijing Research Institute of Uranium Geology, Ministry of Nuclear Industry, Beijing
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Fang Li
Fang Li
Beijing Research Institute of Uranium Geology, Ministry of Nuclear Industry, Beijing
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Published:
January 01, 1989

Abstract

The principles of a new minicomputer-based differential interpretation method of gamma-ray logs by a modified deconvolution technique are described. With the aid of minicomputers, this new method can be used to find the optimal value of α(opt) of a shape constant automatically and to give in the field quantitative interpretation of gamma-ray logs. A number of experimental results obtained both in model boreholes and in field boreholes have shown the applicability of this new modified deconvolution technique to a great variety of circumstances encountered in prospecting for uranium deposits.

Also described are some problems encountered with field use of this new method, especially determination of the optimal sampling interval of gamma-ray logging and the excess of the interpreted thickness of a uranium ore bed. In most cases, the estimated values of the thicknesses of ore beds are greater than the true ones. The excess usually is about one sampling interval, i.e., 10 cm in our case. Finally, a method of determination of the true thickness of ore beds by subtracting the ore sampling interval from the estimated values is proposed.

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Contents

Society of Exploration Geophysicists Geophysical References Series

An Overview of Exploration Geophysics in China — 1988

Zhao Jingxiang
Zhao Jingxiang
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Wang Yanjun
Wang Yanjun
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Fu Xuexin
Fu Xuexin
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Stanley H. Ward
Stanley H. Ward
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Society of Exploration Geophysicists
Volume
3
ISBN electronic:
9781560802662
Publication date:
January 01, 1989

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