Method for displaying acoustic well logging data by producing tr

Details Method for displaying acoustic well logging data by producing tr Method for displaying acoustic well logging data by producing tr

1984-12-20

1987-06-09

Tarcza, Thomas H.

Communications, electrical: acoustic wave systems and devices

Seismic prospecting

Well logging

367 30, 367 69, G01V 100

Patent

active

046725881

ABSTRACT:
A method for producing a display of acoustic signals received during full waveform acoustic well logging. In a preferred embodiment, the signals received at the individual receiver (or receivers) of the logging tool are stacked along lines of constant acoustic velocity to produce for display a stacked signal. Preferably, the raw signals are weighted prior to the stacking step, to compensate for decreasing amplitude of the acoustic arrival of interest with increasing transmitter to receiver distance. The stacked signals produced may be displayed in various formats, such as on a linear or logarithmic scale of inverse acoustic velocity, or of formation porosity. In a preferred embodiment, resulting in production for display of stacked signals providing greater resolution in the direction of the borehole axis, pairwise stacked signals are produced from data received at adjacent receivers, and after two or more acoustic transmitter firings at distinct positions in the borehole, the pairwise stacked signals associated with common depth intervals are added together and the resulting common depth stacks for each depth interval are displayed. The method makes full use of the entire wavetrain of the individual receiver signals processed in accordance therewith, and is sufficiently efficient to facilitate processing and display of acoustic logging data at the well site.

REFERENCES:
patent: 4203161 (1980-05-01), Johnson et al.
patent: 4543648 (1985-09-01), Hsu
patent: 4562557 (1985-12-01), Park et al.
patent: 4575830 (1986-03-01), Ingram et al.
patent: 4594691 (1986-06-01), Kimball et al.

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