Abstract: Spectrum logging is an important method of dynamic monitoring in oil-field development,which used widely in oil-field such as high-precision C/O spectrum and NLL etc. The hydrocarbon reservoir producing status and watered-out degree can be measured, and the data about residual hydrocarbon distribution,high yield water position and channel section can be used to provide reliable zone selection data for plugging, evidences for oil-field scientific development and digging hydrocarbon reservoir are fully supplied.