US 12,235,402 B2
Data-drive separation of downgoing free-surface multiples for seismic imaging
Andrew Dawson, West Hoathly (GB); Philippe Caprioli, Chelmsford (GB); Paal Kristiansen, Oslo (NO); and Abdelghader Najeeb Mohamed Alemam, Crawley (GB)
Assigned to SCHLUMBERGER TECHNOLOGY CORPORATION, Sugar Land, TX (US)
Appl. No. 17/904,526
Filed by SCHLUMBERGER TECHNOLOGY CORPORATION, Sugar Land, TX (US)
PCT Filed Feb. 15, 2021, PCT No. PCT/US2021/018120
§ 371(c)(1), (2) Date Aug. 18, 2022,
PCT Pub. No. WO2021/167865, PCT Pub. Date Aug. 26, 2021.
Claims priority of provisional application 62/979,460, filed on Feb. 21, 2020.
Prior Publication US 2023/0077945 A1, Mar. 16, 2023
Int. Cl. G01V 1/36 (2006.01); G01V 1/34 (2006.01); G01V 1/38 (2006.01)
CPC G01V 1/362 (2013.01) [G01V 1/345 (2013.01); G01V 1/36 (2013.01); G01V 1/38 (2013.01); G01V 2210/1293 (2013.01); G01V 2210/1295 (2013.01); G01V 2210/1423 (2013.01); G01V 2210/1425 (2013.01); G01V 2210/32 (2013.01); G01V 2210/56 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method, comprising:
receiving seismic data comprising signals collected using a receiver;
separating a downgoing wavefield from an upgoing wavefield in the signals;
generating a modified downgoing wavefield by removing direct arrivals from the downgoing wavefield;
estimating a first-order multiple reflection signal at least partially by deconvolving the modified downgoing wavefield and the downgoing wavefield; and
generating a seismic image based at least in part on the estimated first-order multiple reflection signal.