Sonic-Density Logging Without Boreholes


R. O. Lindseth, Teknica Ltd.

5th Formation Evaluation
Symposium of the Canadian Well Logging Society in Calgary, May 5 – 7,



Signal theory demonstrates that it should be possible to produce sonic-density borehole logs from seismic reflection traces. In practice, the process has been defeated by limitations in the quality of the input data. Recent developments in seismic data instrumentation and processing technology mow make it possible to produce a seismic sonic-density log, the ‘Seislog’, on a production basis.