US 11,860,327 B2
Coherent noise-based seismic data verticalization correction method and system
Viktor Smirnov, Carquefou (FR); Clémence Berthonaud, Carquefou (FR); and Julien Ribette, Carquefou (FR)
Assigned to SERCEL, Carquefou (FR)
Filed by SERCEL, Carquefou (FR)
Filed on Jan. 12, 2022, as Appl. No. 17/573,801.
Prior Publication US 2023/0221454 A1, Jul. 13, 2023
Int. Cl. G01V 1/28 (2006.01); G01V 1/38 (2006.01); G01V 1/18 (2006.01)
CPC G01V 1/3843 (2013.01) [G01V 1/186 (2013.01); G01V 1/28 (2013.01); G01V 2210/1423 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for verticalizing recorded seismic data, the method comprising:
recording first data with a particle motion sensor, wherein the particle motion sensor is located on a streamer, and the particle motion sensor is configured to be insensitive to a direct current;
recording second data with a gravity motion sensor, wherein the gravity motion sensor is also located on the streamer, and the gravity motion sensor is configured to be sensitive to the direct current and temporally synchronous to the particle motion sensor;
selecting a cost function that associates corresponding values of the first data and the second data;
determining a misalignment angle from maximizing the cost function, wherein the misalignment angle describes a misalignment between corresponding axes of the particle motion sensor and the gravity motion sensor; and
correcting seismic data recorded by the particle motion sensor based on the misalignment angle so that the corrected seismic data is verticalized with regard to gravity.