Modifying Moveout-Based Anisotropic Spreading Correction for Borehole Seismic Data

Abstract:

The higher signal-to-noise ratio of borehole seismic data compared to surface seismic data makes them suitable for amplitude-related analyses and reflection seismic imaging. However, sometimes removing undesirable effects from the amplitude information is necessary. Energy decay due to wavefront spreading (called geometrical spreading) is one of the effects that should be removed before amplitude analysis and imaging in exploration seismic, and it needs special considerations, where the subsurface medium is highly anisotropic.

One of the successful surface seismic techniques to compensate for energy decay or amplitude distortion due to geometrical spreading is MASC (Moveout-Based Anisotropic Spreading Correction). However, this technique cannot be used for borehole seismic data easily and needs some modifications. Here, we modified this valuable technique for borehole seismic and applied it to a real field case study.

The results show that the modified MASC technique can be applied to borehole seismic data easily with minimum subsurface velocity information.