Patent ID: 8064288
Filing Date: 2011-11-22
Classification: G01V,G03B

Abstract:
1. A method for seismic event mapping, comprising: adaptively velocity filtering seismic signals recorded by seismic sensors disposed at selected positions proximate an area of the Earth's subsurface being evaluated, the seismic sensors generating at least one of optical and electrical signals, the at least one of electrical and optical signals conducted to a computer for processing, wherein the adaptive velocity filtering comprises estimating an apparent velocity of seismic energy traveling from at least two selected points in the subsurface to each of the selected positions, using the apparent velocities to determine a filter passband for each of the plurality of selected positions and filtering the recorded signals for each of the plurality of selected positions using the determined filter passband; transforming the velocity filtered signals into a domain of possible spatial positions of a source of seismic events, the transforming comprising causing the recorded seismic signals to correspond to signals that would be detected by a seismic sensor at each selected position if a seismic event had originated at each position in the domain; and determining an origin in spatial position and time of at least one seismic event originating in the subsurface from space and time distribution of at least one attribute of the transformed seismic data.