Epithermal neutron lifetime logging in partially saturated formations and large-diameter holes

Conference · Sat Aug 01 04:00:00 EDT 1992 · IEEE Transactions on Nuclear Science (Institute of Electrical and Electronics Engineers); (United States)

OSTI ID:6855143

Stromswold, D C; Allen, L S ^[1]

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1. Mobil Research and Development Corp., Dallas, TX (United States)

This paper reports on a prototype logging tool which measures hydrogen content using epithermal neutron lifetime that was operated in airfilled holes through partially saturated formations at the U.S. Department of Energy's Nevada Test Site. Data from model formations of known hydrogen content show that the tool can be calibrated to provide volume fraction of water in partially saturated formations. Such calibrations were obtained for airfilled holes 12 inches (30 cm) in diameter and 8 feet (2.4 m) in diameter, which are typical hole sizes at the nuclear weapons test site. Data from the calibration models also allowed determination of the effects on the measurement caused by tool standoff from the wall of the hole. An 8-foot (2.4-m) diameter hole was logged for 1000 feet (300 m) through a partially saturated silica formation.

• OSTI ID: 6855143
• Report Number(s): CONF-911106--
• Conference Information: Journal Name: IEEE Transactions on Nuclear Science (Institute of Electrical and Electronics Engineers); (United States) Journal Volume: 39:4
• Country of Publication: United States
• Language: English

Related Subjects

07 ISOTOPE AND RADIATION SOURCES
070204 -- Radiation Sources-- Industrial Uses
Radiometric
440400* -- Well Logging Instrumentation
47 OTHER INSTRUMENTATION
BARYONS
BOREHOLES
CAVITIES
DEVELOPED COUNTRIES
ELEMENTARY PARTICLES
ELEMENTS
EPITHERMAL NEUTRONS
FEDERAL REGION IX
FERMIONS
HADRONS
HYDROGEN
LIFETIME
NATIONAL ORGANIZATIONS
NEUTRON LOGGING
NEUTRONS
NEVADA
NEVADA TEST SITE
NONMETALS
NORTH AMERICA
NUCLEONS
RADIOACTIVITY LOGGING
SATURATION
SITE CHARACTERIZATION
US DOE
US ORGANIZATIONS
USA
WATER SATURATION
WELL LOGGING