Regularisation of irregularly sampled seismic data

摘要

There is provided a method of spatially shifting seismic signals acquired through a seismic survey using the steps of identifying within the signals a set of N actual locations of seismic receivers and corresponding N seismic signals received by the set of seismic receivers; identifying a set of N′ desired locations of seismic receivers; and determining a set of N′ signal values at said N′ desired locations by evaluating for each of said N′ signal values a weighted sum of the N seismic signals, wherein the weights are at least partly determined by the relative distance between pairs of locations selected from said set of N actual locations of seismic receivers.

主权项

1. A method of spatially shifting seismic signals acquired through a seismic survey comprising the steps of:
receiving the seismic signals, wherein the seismic signals are recorded by a plurality of seismic receivers arranged in an irregularly spaced grid pattern, and wherein the seismic signals comprise seismic waves that have interacted with geological layers in a subsurface of the Earth; identifying within said seismic signals a set of N actual locations of a set of the seismic receivers and corresponding N seismic signals received by said set of seismic receivers; identifying a set of N′ desired locations of the seismic receivers; interpolating a set of N′ signal values at said N′ desired locations by determining for each of said N′ signal values a weighted sum of said N seismic signals, wherein the weights are at least partly determined by evaluating a sinc function or any mathematical equivalent of said sinc function and wherein pairs of actual locations of the receivers from the set of N actual locations of the set of seismic receivers are used to evaluate the sinc function or any mathematical equivalent of said sinc function; and using the set of N′ signal values to derive a representation of at least a part of a subterranean reservoir.