Salinity and lithology determination from the sodium and chlorine activation lines

Patent · Tue Sep 13 00:00:00 EDT 1983

OSTI ID:5448248

Schweitzer, J S; Tapphorn, R M

In the illustrative embodiments of the invention disclosed, the lithology and salinity of an earth formation traversed by a well bore are investigated by irradiating the formation with a neutron source and generating an energy spectrum of the activation gamma rays resulting therefrom. From the spectrum thus obtained, the level of the activation gamma radiation emitted by /sup 24/Na and that emitted by /sup 38/Cl are determined. The two intensity measurements are then combined, e.g., by forming a cross-plot or ratio thereof, to provide an indication of the lithology and salinity of the earth formation.

• Assignee: Schlumberger Technology Corp.
• Patent Number(s): US 4404467
• OSTI ID: 5448248
• Resource Relation: Patent File Date: Filed date 31 Oct 1980; Other Information: PAT-APPL-202454
• Country of Publication: United States
• Language: English

Related Subjects

15 GEOTHERMAL ENERGY
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
BOREHOLES
IRRADIATION
NEUTRON REACTIONS
ACTIVATION ANALYSIS
RESERVOIR ROCK
GEOPHYSICAL SURVEYS
GAMMA DETECTION
LITHOLOGY
NEUTRON SOURCES
RADIATION DETECTORS
SALINITY
BARYON REACTIONS
CAVITIES
CHEMICAL ANALYSIS
DETECTION
HADRON REACTIONS
MEASURING INSTRUMENTS
NUCLEAR REACTIONS
NUCLEON REACTIONS
PARTICLE SOURCES
RADIATION DETECTION
RADIATION SOURCES
SURVEYS
150303* - Geothermal Exploration & Exploration Technology- Exploratory Drilling & Well Logging
440103 - Radiation Instrumentation- Nuclear Spectroscopic Instrumentation