Two effective approaches to reduce data storage in reverse time migration
W Sun, LY Fu - Computers & Geosciences, 2013 - Elsevier
Prestack reverse time migration (RTM) requires extensive data storage since it computes
wavefields in forward time and accesses wavefields in reverse order. We first review several
successful schemes that have been proposed to reduce data storage, but require more
computational redundancies. We propose two effective strategies to reduce data storage
during RTM. The first strategy is based on the Nyquist sampling theorem, which involves no
extra computational cost. The fact is that the time sampling intervals required by numerical …
wavefields in forward time and accesses wavefields in reverse order. We first review several
successful schemes that have been proposed to reduce data storage, but require more
computational redundancies. We propose two effective strategies to reduce data storage
during RTM. The first strategy is based on the Nyquist sampling theorem, which involves no
extra computational cost. The fact is that the time sampling intervals required by numerical …