Monte Carlo Simulation on n- Density Logging Using A D-D Neutron Generator

HE Xiongying; XU Dapeng; XIE Qin; LU Xiaolong; ZHENG Shiping; YAO Zeen; LAN Changlin

doi:10.11804/NuclPhysRev.30.02.151

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Article Navigation > Nuclear Physics Review > 2013 > 30(2): 151-155

HE Xiongying, XU Dapeng, XIE Qin, LU Xiaolong, ZHENG Shiping, YAO Zeen, LAN Changlin. Monte Carlo Simulation on n- Density Logging Using A D-D Neutron Generator[J]. Nuclear Physics Review, 2013, 30(2): 151-155. doi: 10.11804/NuclPhysRev.30.02.151

Citation:

HE Xiongying, XU Dapeng, XIE Qin, LU Xiaolong, ZHENG Shiping, YAO Zeen, LAN Changlin. Monte Carlo Simulation on n- Density Logging Using A D-D Neutron Generator[J]. Nuclear Physics Review, 2013, 30(2): 151-155. doi: 10.11804/NuclPhysRev.30.02.151

Monte Carlo Simulation on n- Density Logging Using A D-D Neutron Generator

doi: 10.11804/NuclPhysRev.30.02.151

School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China;
Logging While Drilling Center, CNPC Logging, Xi'an 710061, China;

Received Date: 1900-01-01
Rev Recd Date: 1900-01-01
Publish Date: 2013-06-20

Abstract

A D-D neutron source model was developed according to the neutron spectrum and the neutron angular distribution of D-D reaction. A standard calibration well model was built. The transports of the D-D neutrons and γ-rays in the well were simulated using MCNP code. The mixed γ-spectra and inelastic γ-spectra in the NaI detector were obtained for both different distances from a neutron source and different densities. Mixed γ count in the energy range of 2.5 to 5.0 MeV as a function of distance shows that the NaI detector should be located at a distance of 3080 cm from the neutron source. The nonlinear relationships between the density and the mixed γ count were presented in this paper.
It was demonstrated that the energy spectrum of mixed γ rays can realize the n-γ density logging.
- density logging,
- D-D neutron generator,
- monte-carlo simulation,
- limestone
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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

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Monte Carlo Simulation on n- Density Logging Using A D-D Neutron Generator

doi: 10.11804/NuclPhysRev.30.02.151

School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China;

Logging While Drilling Center, CNPC Logging, Xi'an 710061, China;

Received Date: 1900-01-01
Rev Recd Date: 1900-01-01
Publish Date: 2013-06-20

Key words:

Abstract: A D-D neutron source model was developed according to the neutron spectrum and the neutron angular distribution of D-D reaction. A standard calibration well model was built. The transports of the D-D neutrons and γ-rays in the well were simulated using MCNP code. The mixed γ-spectra and inelastic γ-spectra in the NaI detector were obtained for both different distances from a neutron source and different densities. Mixed γ count in the energy range of 2.5 to 5.0 MeV as a function of distance shows that the NaI detector should be located at a distance of 3080 cm from the neutron source. The nonlinear relationships between the density and the mixed γ count were presented in this paper.
It was demonstrated that the energy spectrum of mixed γ rays can realize the n-γ density logging.

Citation: