CPC G01V 1/306 (2013.01) [G01V 1/368 (2013.01); G01V 2210/161 (2013.01); G01V 2210/677 (2013.01)] | 20 Claims |
1. A method for determining a seismic quality factor Q for intervals of subsurface formations, the method comprising:
receiving vertical seismic profile traces;
filtering the vertical seismic profile traces with an inverse impulse response of a downhole receiver;
transforming the filtered vertical seismic profile traces from particle motion measured by the downhole receiver to far-field particle motion represented by a source wavelet;
determining a ratio of spectral amplitudes of a direct arrival event of the transformed vertical seismic profile traces and the source wavelet; and
generating, from the spectral ratio, a value for a quality factor Q representing an attenuation of the vertical seismic profile traces between a source at ground level surface and the downhole receiver;
generating, based on the value of the quality factor Q, a corrected seismic image, the corrected seismic image having a higher resolution than another seismic image generated independent from using the value of the quality factor Q; and
generating, based on the seismic image, a map of the subsurface formations.
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