HF/HR VSP acquisition, processing, and interpretation in the deviated section of the high-angle geothermal borehole of Grigny GGR5, targeting intra-Dogger thin, porous beds | Science and Technology for Energy Transition (STET)

Open Access

Figure 27

Downgoing raw P wavetrain flattened at 100 ms, full bandwidth amplitude peak normalized, then Low Cut filtered LC 120 Hz. Constant gain display. The dominant frequency corresponds to 150 Hz (7 ms period) on this display. The observed amplitude losses are relative to the amplitude of the first peak signal below 60 Hz.

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