Renting Multi-Frequency FWS Sonic Probe for Rock Integrity, Infrastructure & Permeability Profiling

Full Waveform Sonic Velocity Semblance

Our innovative slimline multi-frequency Full Waveform Sonic (FWS) downhole probe is modular, easy to ship, and simple to set up in the field – making it a good choice for geotechnical and engineering applications such as rock integrity, infrastructure, permeability profiling and other every-day applications. Our unique FWS tool includes a single, user-configurable, multi-frequency transmitter, as well as 2 or 3 broadband receivers. For detailed information and product specifications, go to the 2SAA-1000-F Modular Full Waveform Sonic webpage.

Depending on your needs, the FWS tool can be rented with our ultralight mini winches or semi-portable winches up to 1000 meters capacity.

With several FWS probes, a wide selection of winches, loggers, and software in our rental pool, you can be assured that we will be able to supply you a turnkey system when you need it. See the Rentals page for more information, including pricing and longer term discounts. If you have any questions or are ready to arrange a rental, please contact Paul Staples at or call +1 303.279.3211, x110.

Full Waveform Sonic Modular Tool Soils

When you rent borehole logging tools from Mount Sopris, you can be assured of at least two things:

  1. The equipment will be in top condition
  2. You will receive the very best support in the industry.

No one understands the operation and capabilities of the equipment like the manufacturer. Don’t let surprises derail your logging job and potentially affect your pocketbook!

Here are a few important guidelines and hints to ensure your success with the Full Waveform Sonic probe:

  • Zero the tool in LoggerSuite, so that the on-screen depth matches the depth of the bottom of tool.
  • Always centralize the tool for best results. Be sure to size the centralizers so that they fit easily in the borehole to avoid creating “front-end” noise on the waveform. Hint: If there is a restriction at the top of borehole, try using only 3 rods per collar pair instead of the usual 6.
  • Select an operating frequency resonating optimally for the formation and borehole diameter. Check the PDF manual here for details. For example, a 4-inch (0.1016 m) open fluid-filled borehole through sandstone with a Vp of 4500 m/sec, you would select a resonant excitation frequency (lowest mode) of Vp/2D = 22Hz. Set the frequency and other settings in the Tool Panel “Settings/Commands” dialogue box.
  • Waveform length is important. As a general rule, multiple the anticipated 1st arrival time by at least 2x so that flexural waves may be viewed. Generally, for most applications, we recommend 512 samples x 4 uS sampling.
  • Always set receiver gains to a fixed number so that the amplitude does not clip. Longer-spaced receivers may have higher gains. Hint: Select the “OthSvsShort.wch” header, which will save your settings.
  • Collected FWS waveforms must be depth-shifted prior to processing:
    • Tx-Rx1 mid-point channel shift = 1.027m
    • Tx-Rx2 mid-point channel shift = 1.179m
    • Tx-Rx3 mid-point channel shift = 1.332m
  • For the best results, always rent a 3 Receiver tool from Mount Sopris.
  • WellCAD is an excellent resource for processing semblance, filtering, and merging FWS data with other logs.

Contact Mount Sopris for details and have some fun on your next FWS logging project!

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