SPWLA Glossary

A one-dimensional seismic trace constructed from contrasts in velocity or acoustic impedance derived from acoustic transit time logs and/or density logs from a well. The reflection coefficients calculated (at equal intervals of reflection times) from these values are convolved with a typical seismic wavelet to produce the synthetic seismic trace, which may include time-varying filtering, amplitude, and multiple content. It is an excellent medium to correlate well logs to the seismic field record. Errors in integrated transit time must be corrected by using data from a check shot survey or by correlation to the field seismic record section.