Method and system for target oriented interbed seismic multiple prediction and subtraction

A non-transitory computer readable medium storing instructions executable by a computer processor, the instructions comprising functionality for:

• receiving a pre-stack seismic dataset, wherein the pre-stack seismic dataset comprises a plurality of pre-stack traces;
• forming a post-stack seismic image comprising a plurality of post-stack traces from the pre-stack seismic dataset;
• identifying a first post-stack horizon, a second post-stack horizon, and a third post-stack horizon on each of the post-stack traces;
• for each pre-stack trace:
• generating a first multiple-generator trace based, at least in part, on the first post-stack horizon;
• generating a second multiple-generator trace based, at least in part, on the second post-stack horizon;
• generating a third multiple-generator trace based, at least in part, on the third post-stack horizon;
• determining a correlation trace based, at least in part, on a correlation between the first multiple-generator trace and the second multiple-generator trace;
• predicting an interbed multiple trace based, at least in part, on a convolution of the correlation trace and the third multiple-generator trace;
• and
• determining an interbed multiple attenuated trace based, at least in part, on subtracting the interbed multiple trace from the pre-stack seismic trace,
• determining an interbed multiple attenuated pre-stack seismic dataset by combining the interbed multiple attenuated traces.

A system, comprising:

• a seismic acquisition system;
• and
• a seismic processor, configured to:
• receive a pre-stack seismic dataset, wherein the pre-stack seismic dataset comprises a plurality of pre-stack traces;
• forming a post-stack seismic image comprising a plurality of post-stack traces from the pre-stack seismic dataset;
• identify a first post-stack horizon, a second post-stack horizon, and a third post-stack horizon on each of the post-stack traces;
• for each pre-stack trace:
• generate a first multiple-generator trace based, at least in part, on the first post-stack horizon;
• generate a second multiple-generator trace based, at least in part, on the second post-stack horizon;
• generate a third multiple-generator trace based, at least in part, on the third post-stack horizon;
• determine a correlation trace based, at least in part, on a correlation between the first multiple-generator trace and the second multiple-generator trace;
• predict an interbed multiple trace based, at least in part, on a convolution of the correlation trace and the third multiple-generator trace;
• and
• determine an interbed multiple attenuated trace based, at least in part, on subtracting the interbed multiple trace from the pre-stack seismic trace,
• determine an interbed multiple attenuated pre-stack seismic dataset by combining the interbed multiple attenuated traces.