System and methods for determining a converted wave attenuated vertical seismic profile of a hydrocarbon reservoir

A non-transitory computer readable medium storing instructions executable by a computer processor, the instructions comprising functionality for:

• obtaining a multi-component VSP dataset, wherein the multi-component VSP dataset comprises a vertical component and a horizontal component;
• transforming, using a computer processor, the vertical component into a vertical spectrum and the horizontal component into a horizontal spectrum;
• providing a band-pass filter based, at least in part, on an energy signal of the horizontal spectrum;
• determining, using the computer processor, a muted vertical amplitude spectrum by applying the band-pass filter to an amplitude spectrum of the vertical spectrum;
• determining, using the computer processor, an estimated noise model based, at least in part, on the muted vertical amplitude spectrum and the vertical spectrum;
• and
• determining, using the computer processor, the shear-wave attenuated vertical component VSP dataset by adaptively subtracting the estimated noise model from the vertical component of the multi-component VSP dataset.

A system comprising:

• a seismic source;
• a plurality of multicomponent borehole seismic receivers for detecting a seismic wave generated by the seismic source;
• and
• a seismic processor configured to:
• obtain a multi-component VSP dataset, wherein the multi-component VSP dataset comprises a vertical component and a horizontal component;
• transform the vertical component into a vertical spectrum and the horizontal component into a horizontal spectrum;
• provide a band-pass filter based, at least in part, on an energy signal of the horizontal spectrum;
• determine a muted vertical amplitude spectrum by applying the band-pass filter to an amplitude spectrum of the vertical spectrum;
• determine an estimated noise model based, at least in part, on the muted vertical amplitude spectrum and the vertical spectrum;
• and
• determine the shear-wave attenuated vertical component VSP dataset by adaptively subtracting the estimated noise model from the vertical component of the multi-component VSP dataset.