Method and system for estimating converted-wave statics

A non-transitory computer readable memory, having computer-executable instructions stored thereon that, when executed by a processor, perform steps comprising:

• receiving a multicomponent seismic dataset for a subterranean region, wherein the multicomponent seismic dataset comprises a pressure wave (PP) seismic dataset and a pressure-to-shear converted wave (PS) seismic dataset;
• determining an array of PP-source statics and an array of PP-receiver statics for the PP-seismic dataset;
• generating a PP-receiver stack based, at least in part, on the PP-seismic dataset, the array of PP-source statics, and the array of PP-receiver statics, wherein the PP-receiver stack comprises a plurality of source-static and receiver-static corrected PP-stacked traces;
• generating a PS-receiver stack based, at least in part, on the PS-seismic dataset and the array of PP-source statics, wherein the PS-receiver stack comprises a plurality of source-static corrected PS-stacked traces;
• identifying a PP-target event on the PP-receiver stack;
• forming a space-time window of the PS-receiver stack guided by the PP-target event, wherein the space-time window comprises a plurality of windowed traces;
• determining an objective function based, at least in part, on the space-time window;
• determining an array of PS-receiver statics based, at least in part, on an extremum of the objective function, wherein the array comprises one PS-receiver static for each windowed trace;
• forming a statics-corrected PS-seismic dataset based, at least in part, on the PS-seismic dataset, the array of PS-receiver statics, and the array of PP-source statics, wherein the statics-corrected PS-seismic dataset comprises a plurality of source-static and receiver-static corrected PS-stacked traces;
• and
• forming a seismic image based, at least in part, on the statics-corrected PS-seismic dataset.

A system, comprising:

• a seismic acquisition system configured to record a multicomponent seismic dataset for a subterranean region, wherein the multicomponent seismic dataset comprises a pressure wave (PP) seismic dataset and a pressure-to-shear converted wave (PS) seismic dataset;
• and
• a seismic processing system configured to:
• receive the multicomponent seismic dataset,
• determine an array of PP-source statics and an array of PP-receiver statics for the PP-seismic dataset,
• generate a PP-receiver stack based, at least in part, on the PP-seismic dataset, the array of PP-source statics, and the array of PP-receiver statics, wherein the PP-receiver stack comprises a plurality of source-static and receiver-static corrected PP-stacked traces,
• generate a PS-receiver stack based, at least in part, on the PS-seismic dataset and the array of PP-source statics, wherein the PS-receiver stack comprises a plurality of source-static corrected PS-stacked traces,
• identify a PP-target event on the PP-receiver stack,
• form a space-time window of the PS-receiver stack guided by the PP-target event, wherein the space-time window comprises a plurality of windowed traces,
• determine an objective function based, at least in part, on the space-time window,
• determine an array of PS-receiver statics based, at least in part, on an extremum of the objective function, wherein the array comprises one PS-receiver static for each windowed trace,
• form a statics-corrected PS-seismic dataset based, at least in part, on the PS-seismic dataset, the array of PS-receiver statics, and the array of PP-source statics, wherein the statics-corrected PS-seismic dataset comprises a plurality of source-static and receiver-static corrected PS-stacked traces, and
• form a seismic image based, at least in part, on the statics-corrected PS-seismic dataset.