Development of pulsed neutron uranium logging instrument

Journal Article · Sun Mar 15 00:00:00 EDT 2015 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.4913660· OSTI ID:22392420

Wang, Xin-guang ^[1]; Liu, Dan ^[2]; Zhang, Feng ^[1]

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1. School of Geosciences, China University of Petroleum, Qingdao 266580 (China)
2. China Institute of Atomic Energy, Beijing 102413 (China)

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 {sup 235}U, 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.

• OSTI ID: 22392420
• Journal Information: Review of Scientific Instruments, Vol. 86, Issue 3; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
CALIBRATION
COMPUTERIZED SIMULATION
DISTRIBUTION
EPITHERMAL NEUTRONS
LIFETIME
MONTE CARLO METHOD
NEUTRON GENERATORS
POROSITY
PULSES
THERMAL FISSION
THERMAL NEUTRONS
URANIUM
URANIUM 235