Formation fracture detection using instantaneous characteristics

Details Formation fracture detection using instantaneous characteristics Formation fracture detection using instantaneous characteristics

1989-05-17

1992-06-23

Lobo, Ian J.

Communications, electrical: acoustic wave systems and devices

Seismic prospecting

Well logging

G01V 140

Patent

active

051249529

ABSTRACT:
A method for enhancing a plurality of recorded waveforms from sonic logging is disclosed. As a function of depth along a well borehole, a plurality of sonic waveforms is obtained. Adjacent waveforms are registered by time shifting so that common event coincides between adjacent waveforms. Typically this is the arrival of the P, S or S.sub.t wave component. Then, adjacent waveforms are subtracted from one another to provide a difference waveform, and the difference waveforms are then presented. This enhances oblique occurring events. Further, instantaneous waveform characteristics for each of the recorded waveforms are presented to further assist in data interpretation to locate and identify oblique occurring events.

REFERENCES:
patent: 3500543 (1970-03-01), Quarles, Jr.
patent: 4210966 (1980-07-01), Ingram
patent: 4279026 (1981-07-01), Lambright et al.
patent: 4672588 (1987-06-01), Willen

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