Neutron-Induced gamma ray spectroscopy for reservoir analysis

Journal Article · Wed Jun 01 04:00:00 EDT 1983 · SPEJ, Soc. Pet. Eng. J.; (United States)

DOI:https://doi.org/10.2118/9461-PA· OSTI ID:5418508

Westaway, P; Hertzog, R; Plasek, R E

The weighted least-squares (WLS) approach to spectral analysis has enabled more information to be extracted from the downhole recorded induced gamma ray spectra than was previously possible. GST (gamma ray spectroscopy tool), with its optimized inelastic and capture spectral modes, permits analysis of most and often all significant elements present in the formation and provides the possibility of evaluating hydrocarbons, salinity, lithology, porosity, and shaliness. Data have been obtained in a wide range of conditions in open and cased holes with the GST tool both in its present and experimental versions. This paper presents field examples to demonstrate the versatility and potential of the technique, not only as an effective oil-finder independent of water salinity conditions but as a valuable input to a more complete interpretation of well logs.

• Research Organization: Schlumberger Technical Services
• OSTI ID: 5418508
• Journal Information: SPEJ, Soc. Pet. Eng. J.; (United States), Journal Name: SPEJ, Soc. Pet. Eng. J.; (United States) Vol. 23:3; ISSN SSPJD
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
DATA
DATA ANALYSIS
ENGINEERING
EVALUATION
EXPERIMENTAL DATA
FIELD TESTS
GAMMA SPECTROSCOPY
HYDROCARBONS
INFORMATION
LITHOLOGY
NEUTRON LOGGING
NEUTRON-GAMMA LOGGING
NUMERICAL DATA
OIL WELLS
ORGANIC COMPOUNDS
POROSITY
RADIOACTIVITY LOGGING
RESERVOIR ENGINEERING
RESERVOIR ROCK
SALINITY
SPECTROSCOPY
TESTING
WELL LOGGING
WELLS