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Borehole source of SH-waves SHock


on request
Item ID: sh-bh


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Main features:
  • Operating energies ‎from 1500 J
  • Operation in dry wells
  • Operations in boreholes of various diameter

The borehole source SHock is utilized to generate pressure (P-) and shear waves of horizontal polarization (SH-waves) in wells while performing the operations through crosshole seismic testing (CST) and reverse vertical seismic profiling (RVSP) methods. The power supply Jack is used as the source of energy.

The source generates a transverse wave through an asymmetric blow delivered into wall of the well. A rigid pneumo-electric line makes it easy to rotate the source in the borehole, providing generation of "right" and "left" blows. The SHock source allows excitation of seismic signal in both water-filled and dry wells, what is not feasible for borehole sparkers.

The source is supplied on a reel equipped with a high-voltage slip ring. Thus, one does not need to disconnect the power supply during operations of winding / unwinding the cable.

The set includes:
  • SHock source
  • Pneumo-electric line
  • Reel with high-voltage slip ring
  • Wire to connect a reel and a power supply

Shock_сейсмограммы ОПП.png

An example of CRP seismograms registered by the 3C seismic cable while exciting the signal with the SHock source in an adjacent well. Picture above shows two CRP seismograms, picture below – P- and S-waves spectra. The source operation was provided by power supply Jack.


х-компонента.PNGy- компонента.PNG

Examples of CRP seismograms for non-oriented X- and Y-components with superimposition of right and left blows.

RadExPro ориентация.jpg

An illustration of the process of orienting the seismic record in XY plane in RadExPro Plus program. Visualization of the "sonde path" is shown on the left. Right part illustrates seismic records for non-oriented (X‘ and Y') and oriented (X and Y) components.

3С МСП SH разница и -.png

Example of data after 3C records orientation and subtraction of “right” and “left” blows


Minimum borehole diameter 40 mm
Features for different borehole diameters Replaceable electrode groups
Replaceable discharge chambers
Energy 150 - 2000 J
Weight (without cable) 5 kg
Length 700 mm
All year round
marin, land, borehole
1D, 2D, 3D, 4D