Carbon/oxygen well logging method and apparatus

Patent · Tue Jun 26 04:00:00 EDT 1990

OSTI ID:6832249

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

This paper describes a method for determining the hydrocarbon saturation S{sub O} of a formation traversed by a borehole. It comprises: emitting fast neutrons into the formation from a source in the well bore, detecting inelastic gamma ray spectrum signals at near and far detectors from the source in response to gamma rays produced during inelastic nuclear reactions between the fast neutrons and materials in an of the borehole and the formation, and comparing representations of the near and far inelastic gamma ray spectrum signals respectively with predetermined model representations of the borehole and the formation to produce a representation of the hydrocarbon saturation in the formation substantially corrected for gamma rays produced by the nuclear reactions between the fast neutrons and the materials in and of the borehole.

• Assignee: Schlumberger Technology Corp., Houston, TX (USA)
• Patent Number(s): A; US 4937446
• Application Number: PPN: US s 7-401579
• OSTI ID: 6832249
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020200* -- Petroleum-- Reserves
Geology
& Exploration
03 NATURAL GAS
030200 -- Natural Gas-- Reserves
Geology
& Exploration
DETECTION
EQUIPMENT
EXPLORATION
GAMMA DETECTION
GAMMA SOURCES
GAMMA-GAMMA LOGGING
GEOLOGIC DEPOSITS
MINERAL RESOURCES
NATURAL GAS DEPOSITS
PETROLEUM DEPOSITS
RADIATION DETECTION
RADIATION SOURCES
RADIOACTIVITY LOGGING
RESOURCES
WELL LOGGING
WELL LOGGING EQUIPMENT