Borehole and surface‐to‐borehole seismic applications in fracture characterization

Paillet, F. L.; Turpening, Roger M.

doi:10.1190/1.1894017

“…Les enregistrements du champ d'ondes total permettent de déterminer les vitesses de propagation des différents modes et certains paramètres pétrophysiques, et d'obtenir des informations lithologiques et mécaniques (Gaudiani, 1982 ;Arditty, Garens et Staron, 1984 ;Morris, Little et Letton, 1984 ;Paillet et Turpening, 1984 ;Mari, Coppens, Gavin et Wicquart, 1992 ;Mari, Gaudiani et Delay, 2011).…”

Section: Resultsunclassified

Sismique en forage et diagraphies acoustiques

Mari¹,

Vergniault²

2020

View full text Add to dashboard Cite

show abstract

“…One of the important fracture characterization methods planned for the future at Mirror Lake is vertical seismic profiling (Paillet and Turpening, 1984). For this reason, accurate seismic background data is important, and acoustic waveform logs were made for all four boreholes using two conventional acoustic sources of 34 and 15 kilohertz, and a new low frequency source with a 5 kHz centerband frequency (Paillet and Turpening 1984) .…”

Section: Borehole Equipmentmentioning

confidence: 99%

“…One of the important fracture characterization methods planned for the future at Mirror Lake is vertical seismic profiling (Paillet and Turpening, 1984). For this reason, accurate seismic background data is important, and acoustic waveform logs were made for all four boreholes using two conventional acoustic sources of 34 and 15 kilohertz, and a new low frequency source with a 5 kHz centerband frequency (Paillet and Turpening 1984) . These logs are recorded by digitizing the entire pressure signal received by the acoustic-logging probe, rather than routing this signal through the acoustic-arrival detection system in the conventional acoustic logging system.…”

Section: Borehole Equipmentmentioning

confidence: 99%

Geophysical well log data for study of water flow in fractures near Mirror Lake, West Thornton, New Hampshire

Paillet¹

1985

View full text Add to dashboard Cite

Four closely spaced boreholes were drilled through about 20 meters of till into schist bedrock near Mirror Lake, West Thornton, New Hampshire.The site was selected for borehole-geophysical research because it is included in a detailed ground-water study where the effects of flow in fractures on flow in overlying drift deposits is being studied. Three of the boreholes are about 100 meters deep and the fourth is about 230 meters in depth. All four boreholes were logged with caliper, natural gamma, single-point-resistivity, acoustic and acoustic televiewer logs. Fracture sets dipping about 45° to the east were detected in all four boreholes. Two sets of deeper fractures were detected near the bottom of the deepest borehole. Acoustic waveform logs were obtained in all boreholes using three different source frequencies, 34, 15, and 5 kilohertz, for future comparison between surface and borehole seismic data.

show abstract

“…Full wave field recordings enable the determination of the propagation velocities of the various modes and some petrophysical parameters, and the ascertainment of lithological and mechanical information (Gaudiani, 1982;Arditty, Arens and Staron, 1984;Morris, Little and Letton, 1984;Paillet and Turpening, 1984;Mari, Coppens, Gavin and Wicquart, 1992;Mari, Arens, Chapellier and Gaudiani, 1998;Mari, Gaudiani and Delay, 2011).…”

Section: Introductionmentioning

confidence: 99%