Development of pulsed neutron uranium logging instrument

作者：Wang, Xin-guang^*; Liu, Dan; Zhang, Feng

来源：Review of Scientific Instruments, 2015, 86(3): 034501.

DOI：10.1063/1.4913660

• D-T neutron generators
• Epithermal neutron
• Logging instruments
• Logging response
• Pulsed neutron
• Temporal distribution
• Thermal neutrons
• Uranium contents

This article introduces a development of pulsed neutron uranium logging instrument. By analyzing the temporal distribution of epithermal neutrons generated from the thermal fission of U-235, we propose a new method with a uranium-bearing index to calculate the uranium content in the formation. An instrument employing a D-T neutron generator and two epithermal neutron detectors has been developed. The logging response is studied using Monte Carlo simulation and experiments in calibration wells. The simulation and experimental results show that the uranium-bearing index is linearly correlated with the uranium content, and the porosity and thermal neutron lifetime of the formation can be acquired simultaneously.

• 出版日期2015-3
• 单位中国原子能科学研究院; 中国石油大学（北京）; 东华理工大学