Abstract: A method for generating an improved stack from wide azimuth data. This is accomplished by displaying gather traces in a geometrically sensible way that depends on gather and processing type. Once a gather is available in such a manner, a geoscientist can use various geometric or freehand shapes to indicate which traces from the gather to stack and which to ignore. Given sufficient computing power, this can be done interactively, allowing a geoscientist to determine a set of traces that create an optimal stack at a single location in the output cube. Multiple locations can be improved in this manner and a final stack can be generated that contains a blended agglomeration of all of the improvements.

Abstract: A method for generating an improved stack from wide azimuth data. This is accomplished by displaying gather traces in a geometrically sensible way that depends on gather and processing type. Once a gather is available in such a manner, a geoscientist can use various geometric or freehand shapes to indicate which traces from the gather to stack and which to ignore. Given sufficient computing power, this can be done interactively, allowing a geoscientist to determine a set of traces that create an optimal stack at a single location in the output cube. Multiple locations can be improved in this manner and a final stack can be generated that contains a blended agglomeration of all of the improvements.

Abstract: A method for generating a seismic image, comprising the steps of providing an input trace corresponding to seismic signals received at a receiver at a known receiver depth, using the input trace to generate a series of angle traces, each having a known time dip, for each angle trace, determining a filter H, for each angle trace, correcting the data by using the inverse of the filter H to generate a plurality of deghosted angle traces, copying each deghosted angle trace to a plurality of output locations and applying in each case the time dip for that angle trace so as to generate a plurality of corrected angle traces, at each output location summing a plurality of the corrected angle traces at that output location so as to generate a replacement trace; and using the replacement trace, preferably in combination with other replacement traces, to generate a seismic image.

Abstract: Apparatuses and methods for collecting and analyzing seismic data (D) include a frequency dependent noise factor (?2) for stabilizing a transformation matrix (S). The noise factor (?2) is a function of a number of nonzero eigenvalues of the transformation matrix (S).

Abstract: A method for generating a seismic image, comprising the steps of providing an input trace corresponding to seismic signals received at a receiver at a known receiver depth, using the input trace to generate a series of angle traces, each having a known time dip, for each angle trace, determining a filter H, for each angle trace, correcting the data by using the inverse of the filter H to generate a plurality of deghosted angle traces, copying each deghosted angle trace to a plurality of output locations and applying in each case the time dip for that angle trace so as to generate a plurality of corrected angle traces, at each output location summing a plurality of the corrected angle traces at that output location so as to generate a replacement trace; and using the replacement trace, preferably in combination with other replacement traces, to generate a seismic image.

Abstract: Apparatuses and methods for collecting and analyzing seismic data (D) include a frequency dependent noise factor (?2) for stabilizing a transformation matrix (S). The noise factor (?2) is a function of a number of nonzero eigenvalues of the transformation matrix (S).