TY - GEN
T1 - Least squares migration of stacked supergathers
AU - Dai, Wei
AU - Zhan, Ge
AU - Schuster, Gerard
PY - 2010/1/1
Y1 - 2010/1/1
N2 - We show that phase-encoded shot gathers can be stacked together to form supergathers and efficiently migrated using an iterative least squares migration (LSM) method. The major problem of cross-talk can be largely eliminated by iterative stacking of the phase-encoded migrations and a multisource preconditioning factor, where random static shifts are used for the phase encoding function. Empirical results with synthetic seismic data suggests that increasing the number of stacked shot gathers requires an attendant increase in the number of LSM iterations. A key merit of phase-encoded LSM of supergathers is that, under ideal conditions, computational costs, 10, and storage requirements can be reduced by several orders of magnitude compared to conventional LSM.
AB - We show that phase-encoded shot gathers can be stacked together to form supergathers and efficiently migrated using an iterative least squares migration (LSM) method. The major problem of cross-talk can be largely eliminated by iterative stacking of the phase-encoded migrations and a multisource preconditioning factor, where random static shifts are used for the phase encoding function. Empirical results with synthetic seismic data suggests that increasing the number of stacked shot gathers requires an attendant increase in the number of LSM iterations. A key merit of phase-encoded LSM of supergathers is that, under ideal conditions, computational costs, 10, and storage requirements can be reduced by several orders of magnitude compared to conventional LSM.
UR - http://www.scopus.com/inward/record.url?scp=84893617057&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:84893617057
SN - 9781618392244
T3 - 72nd European Association of Geoscientists and Engineers Conference and Exhibition Incorporating SPE EUROPEC 2010, Workshops
SP - 328
EP - 332
BT - 72nd European Association of Geoscientists and Engineers Conference and Exhibition Incorporating SPE EUROPEC 2010, Workshops
PB - European Association of Geoscientists and Engineers, EAGE
T2 - 72nd European Association of Geoscientists and Engineers Conference and Exhibition Incorporating SPE EUROPEC 2010
Y2 - 14 June 2010 through 17 June 2010
ER -