US 2025/0277918 A1 · 3D ANGLE-DOMAIN SEISMIC RESIDUAL STATICS

Abstract

Methods and systems for correcting a seismic dataset are disclosed. The methods may include receiving a seismic dataset comprising a plurality of traces and sorting the plurality of traces into a plurality of bins, wherein each bin comprises a range of seismic source-seismic receiver midpoint locations, range of offsets, and range of azimuths. The methods may also include, for each of the plurality of bins determining a pilot trace based on a plurality of sorted traces in the bin, selecting a pilot refraction window and a pilot reflection window from the pilot trace; selecting for each of the plurality of sorted traces, a refraction window and a reflection window from the sorted trace, determining a correction value based on the refraction window, the pilot refraction window, the reflection window and the pilot reflection window; and determining a corrected trace by applying the correction value to the trace.

Claims20

Dependent claims

A method of correcting a seismic dataset pertaining to a subterranean region, comprising:

receiving a seismic dataset comprising a plurality of traces, wherein each of the plurality of traces represents a time-series of ground motion caused by an activation of a seismic source at a seismic source location and recorded by a seismic receiver at a seismic receiver location;
sorting the plurality of traces into a plurality of bins, wherein each bin comprises a range of midpoint locations, a range of seismic source-seismic receiver offsets, and a range of seismic source-seismic receiver azimuths;
and
for each of the plurality of bins:
determining a pilot trace based on a plurality of sorted traces in the bin,
selecting a pilot refraction window from the pilot trace,
selecting a pilot reflection window from the pilot trace, and
for each of the plurality of sorted traces:
selecting a refraction window from the sorted trace;
selecting a reflection window from the sorted trace;
determining a correction value based on the refraction window, the pilot refraction window, reflection window and the pilot reflection window;
and
determining a corrected trace by applying the correction value to the trace.

10 more elements

A system for correcting a seismic dataset pertaining to a subterranean region, comprising:

a seismic acquisition system configured to acquire a seismic dataset pertaining to the subterranean region;
and
a seismic processing system configured to:
receive the seismic dataset from the seismic acquisition system, wherein the seismic dataset comprises a plurality of traces, wherein each of the plurality of traces represents a time-series of ground motion caused by an activation of a seismic source at a seismic source location and recorded by a seismic receiver at a seismic receiver location;
sort the plurality of traces into a plurality of bins, wherein each bin comprises a range of midpoint locations, a range of seismic source-seismic receiver offsets, and a range of seismic source-seismic receiver azimuths;
and
for each of the plurality of bins:
determine a pilot trace based on a plurality of sorted traces in the bin,
select a pilot refraction window from the pilot trace,
select a pilot reflection window from the pilot trace, and
for each of the plurality of sorted traces:
select a refraction window from the sorted trace;
select a reflection window from the sorted trace;
determine a correction value based on the refraction window, the pilot refraction window, reflection window and the pilot reflection window;
and
determine a corrected trace by applying the correction value to the trace.

13 more elements

Dependencies are inferred from the claim text.

3d angle-domain seismic residual statics

Life of this patent

3d angle-domain seismic residual statics

Life of this patent

Abstract

Claims20