A multi-function compensated spectral natural gamma ray logging system

Conference · Sat Oct 01 04:00:00 EDT 1983 · Soc. Pet. Eng. AIME, Pap.; (United States)

OSTI ID:5330218

Smith, H D; Arnold, D M; Deaton, J G; Gadeken, L L; Robbins, C A

A natural gamma ray spectroscopy logging system has been designed which incorporates active compensation for differences in borehole conditions into the least squares calculation of the K-U-Th elemental concentrations. A low atomic number toolcase allows gamma rays in the photoelectric energy region to be detected, while a coincidence gain stabilization technique distinguishes formation gammas from those originating in the stabilizer source. These features permit additional measurements of formation lithology in open holes and mean casing thickness in cased wells.

• Research Organization: Welex/A Halliburton Co.
• OSTI ID: 5330218
• Report Number(s): CONF-8310121-
• Conference Information: Journal Name: Soc. Pet. Eng. AIME, Pap.; (United States) Journal Volume: SPE12050
• Country of Publication: United States
• Language: English

Related Subjects

440400* -- Well Logging Instrumentation
47 OTHER INSTRUMENTATION
ACTINIDES
ALKALI METALS
ATOMIC NUMBER
BOREHOLES
CAVITIES
COINCIDENCE CIRCUITS
DESIGN
ELECTRONIC CIRCUITS
ELEMENTS
GAMMA LOGGING
GAMMA SPECTROMETERS
GAMMA SPECTROSCOPY
LEAST SQUARE FIT
LITHOLOGY
MAXIMUM-LIKELIHOOD FIT
MEASURING INSTRUMENTS
METALS
NUMERICAL SOLUTION
ORE COMPOSITION
POTASSIUM
RADIOACTIVITY LOGGING
RESERVOIR ROCK
SPECTROMETERS
SPECTROSCOPY
THORIUM
URANIUM
WELL CASINGS
WELL LOGGING