Patent ID: 11880010
Assignee: TROFIMUK INSTITUTE OF PETROLEUM GEOLOGY AND GEOPHYSICS
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A method for providing seismic images of a subsurface by enhancing pre-stack seismic data, the method comprising:
measuring reflections of seismic waves emitted into a geological formation;
generating, from the reflections of the seismic waves, seismic data comprising a plurality of seismic traces;
sorting the seismic data into at least one multidimensional gather comprising a data domain;
determining local kinematical attributes of a seismic trace of the plurality of seismic traces, the local kinematical attributes representing travel-times local to the seismic trace;
forming an ensemble of seismic traces, wherein the seismic trace represents a reference point for the ensemble;
applying local moveout corrections to each seismic trace of the ensemble;
applying residual statics and phase corrections for each seismic trace that is corrected by the local moveout corrections;
summing the seismic traces of the ensemble to obtain an output seismic trace having an increased signal-to-noise ratio (SNR) relative to the seismic trace of the plurality of seismic traces that represents the reference point for the ensemble of seismic traces;
generating a seismic image from the output seismic trace, the seismic image having an increased resolution relative to another seismic image generated without the output seismic trace; and
based on the seismic image, controlling a field operation to extract hydrocarbons.