Low radioactivity spectral gamma calibration facility
A low radioactivity calibration facility has been constructed at the Nevada Test Site (NTS). This facility has four calibration models of natural stone that are 3 ft in diameter and 6 ft long, with a 12 in. cored borehole in the center of each model and a lead-shielded run pipe below each model. These models have been analyzed by laboratory natural gamma ray spectroscopy (NGRS) and neutron activation analysis (NAA) for their K, U, and Th content. Also, 42 other elements were analyzed in the NAA. The /sup 222/Rn emanation data were collected. Calibrating the spectral gamma tool in this low radioactivity calibration facility allows the spectral gamma log to accurately aid in the recognition and mapping of subsurface stratigraphic units and alteration features associated with unusual concentrations of these radioactive elements, such as clay-rich zones.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); East China Petroleum Inst., Dongying, SD; EG and G Energy Measurements, Inc., Las Vegas, NV (USA); Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 5879070
- Report Number(s):
- LA-UR-86-980; CONF-8606105-1; ON: DE86008745
- Resource Relation:
- Conference: 27. annual logging symposium of the Society of Professional Well Log Analysts, Houston, TX, USA, 9 Jun 1986
- Country of Publication:
- United States
- Language:
- English
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