Research on the temperature character of the detector of smalldiameter natural gamma ray spectrum logging tool
DOI:
Author:
Affiliation:
1.School of Geosciences, China University of Petroleum(huadong), Qingdao 266555, China; 2. The Institute of Acoustics of the Chinese Academy of Sciences, Beijing 100101, China
Clc Number:
TL814
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Abstract:
The size and temperature character of the gamma ray detector are primary factors which influence the quality of well logging directly in developing smalldiameter natural gamma ray spectrum logging tool. The spectrum response of the detector is measured at various temperatures in natural radioactive background. By comparing the changes of gamma ray spectrum and the character of the logging tool’s spectrum stabilization by highvoltage at different temperatures, it is able to obtain that, the total rate and the address of element K’s characteristic peak in gamma ray spectrum changes slowly when the environment temperature is below 150 degree centigrade. And under 125 degree centigrade, the resolution of detector works in high condition. So it is said the tool’s best working temperature is below 125 degree centigrade.