Carbon/oxygen well logging method and apparatus

Patent · Tue Sep 03 04:00:00 EDT 1991

OSTI ID:5682767

McKeon, D C; Roscoe, B A; Stoller, C

This patent describes a method for determining the hydrocarbon saturation S{sub 0} of an earth formation surrounding a borehole. It comprises emitting fast neutrons into the formation from a neutron source in the borehole, detecting gamma rays resulting from the interaction between the neutrons and materials from the borehole and the formation; forming gamma ray spectrum signals from the gamma rays and deriving from the signals the carbon yield and oxygen yield; expressing the carbon yield as a first linear function of S{sub 0} and of C{sub b}; and deriving S{sub 0} from the first and second linear functions.

• Assignee: Schlumberger Technology Corp., Houston, TX (United States)
• Patent Number(s): US 5045693; A
• Application Number: PPN: US 7-514915
• OSTI ID: 5682767
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020200* -- Petroleum-- Reserves
Geology
& Exploration
023000 -- Petroleum-- Properties & Composition
07 ISOTOPE AND RADIATION SOURCES
070204 -- Radiation Sources-- Industrial Uses
Radiometric
440400 -- Well Logging Instrumentation
47 OTHER INSTRUMENTATION
BARYONS
BOREHOLES
CARBON
CAVITIES
ELEMENTARY PARTICLES
ELEMENTS
EQUIPMENT
FAST NEUTRONS
FERMIONS
GAMMA SPECTRA
GEOCHEMICAL SURVEYS
GEOLOGIC FORMATIONS
HADRONS
HYDROCARBONS
NEUTRON LOGGING
NEUTRON SOURCES
NEUTRON-GAMMA LOGGING
NEUTRONS
NONMETALS
NUCLEONS
OIL SATURATION
ORGANIC COMPOUNDS
PARTICLE SOURCES
RADIATION SOURCES
RADIOACTIVITY LOGGING
SATURATION
SPECTRA
SURVEYS
WELL LOGGING
WELL LOGGING EQUIPMENT