Analysis of the elemental spectral characteristics of single elemental capture spectrum log using Monte-Carlo simulation*
Lan Chang-Lin, Zhan Xu-Wen, Wu Hong-Liang, Zhang Yi , Liu Tong, Feng Zhou, and Lv Tao
1. School of Nuclear Science and Technology, Lanzhou University, Gansu 730000, China.
2. Research Institute of Petroleum Exploration and Development, Beijing 100083, China.
Abstract In this study, the gamma-ray spectrum of single elemental capture spectrum log was simulated. By numerical simulation we obtain a single-element neutron capture gamma spectrum. The neutron and photon transportable processes were simulated using the Monte Carlo N-Particle Transport Code System (MCNP), where an Am–Be neutron source generated the neutrons and thermal neutron capture reactions with the stratigraphic elements. The characteristic gamma rays and the standard gamma spectra were recorded, from analyzing of the characteristic spectra analysis we obtain the ten elements in the stratum, such as Si, Ca, Fe, S, Ti, Al, K, Na, Cl, and Ba. Comparing with single elemental capture gamma spectrum of Schlumberger, the simulated characteristic peak and the spectral change results are in good agreement with Schlumberger. The characteristic peak positions observed also consistent with the data obtained from the National Nuclear Data Center of the International Atomic Energy Agency. The neutron gamma spectrum results calculated using this simple method have practical applications. They also serve as an reference for data processing using other types of element logging tools.
This work was supported by The National S & T Major Special Project (No. 2011ZX05020-008).
Corresponding Authors: Lan Chang-Lin(Email: lanchl@lzu.edu.cn)
E-mail: lanchl@lzu.edu.cn
About author: Lan Chang-Lin, Ph.D., graduated from Lanzhou University (Lanzhou) in 2009. Currently, he is a full-time professor at the School of Nuclear Science and Technology, Lanzhou University. His main research interests include the neutron logging technology and the nuclear technology application.
Cite this article:
. Analysis of the elemental spectral characteristics of single elemental capture spectrum log using Monte-Carlo simulation*[J]. APPLIED GEOPHYSICS, 2019, 16(3): 321-326.
2019, Vol. 16 
