Time dependent signatures: Moisture content interpretation in well logging applications with a D-T neutron generator

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS

卷:466

Article

Vo, Long K.¹  Sharma, Sanchit¹  Pinilla, Maria¹  Dunn, William L.¹  Bahadori, Amir A.¹  McNeil, Walter J.¹ 

[1] Kansas State Univ, Alan Levin Dept Mech & Nucl Engn, 3002 Rathbone Hall, Manhattan, KS 66506 USA

关键词: Well logging;    D-T;    Moisture content;    Time dependence;    Radiation detection & measurement;   

DOI  :  10.1016/j.nimb.2019.12.030

来源: Elsevier

【 摘 要 】

Measurements were collected at the Kansas State University Material Interrogation (KSUMI) facility to investigate whether a machine neutron source can effectively replace chemical neutron and photon sources in well logging applications. A large test chamber was constructed and filled in respective tests with the following: water, saline, dry sand, wet sand, nearly dry limestone, and wet limestone. The filled test chamber acted as an underground environment and the water acted as a surrogate for hydrocarbons. The KSUMI data acquisition system features options for spectroscopic and time dependent studies of neutrons and neutron-induced photons. The ability to correlate energies to their time of detection opened an avenue for interpretation of the test chamber characteristics by the isotopic time signatures. The results showed that a hydrogen time signature has a strong relationship with the moisture content. The results also indicated that the material density and absorber content have effects on the hydrogen time signatures, which consequently affect the moisture content interpretation of the test chamber.

【 授权许可】

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