Pdf Reverse Time Migration Using Wavefield Decomposition Liu, f., g. zhang, s. a. morton, and j. p. leveille, 2007, reverse time migration using one way wavefield imaging condition: seg technical program expanded abstracts, 26, 2170–2174. Prestack reverse time migration, a wave equation technique using two way propagation, correctly handles multi arrivals and enables imaging of overturned reflections.
Pdf Reverse Time Migration Prestack reverse time migration is accomplished in two steps. first, a shot signature at surface is propagated forward in time using a two way wave equation and saved on a disk file. sec ond, the recorded surface wavefield is time reversed and back ward propagated using the same wave equation. The results show that rtm using wavefield decomposition is a promising remedy for attenuating artifacts compared to the implementation of a low cut filter. however, some artifacts still remain in the decomposed rtm image. Reverse time migration of tti media using the decomposed wavefield. journal of seismic exploration, 28: 245 256. reverse time migration (rtm) produces complex structure imaging with full wavefield information. this is the highest precision imaging method to date. Abstract:reverse time migration has attracted more and more attention owing to the advantages of high imaging accuracy, no dip restriction, and adaptation to complex velocity models.
Pdf True Amplitude Angle Gathers From Reverse Time Migration By Reverse time migration of tti media using the decomposed wavefield. journal of seismic exploration, 28: 245 256. reverse time migration (rtm) produces complex structure imaging with full wavefield information. this is the highest precision imaging method to date. Abstract:reverse time migration has attracted more and more attention owing to the advantages of high imaging accuracy, no dip restriction, and adaptation to complex velocity models. Reverse time migration ͑rtm͒ exhibits great superiority over other imaging algorithms in handling steeply dipping structures and complicated velocity models. Seismic images generated by reverse time migration (rtm) are often contaminated by low wavenumber artifacts. decomposition of up and downgoing waves during propagation can effectively reduce these artifacts. This article introduces the optical flow vector method to rtm to realize high precision wavefield decomposition for both the source and receiver wavefields and obtains four directions of wavefields: up , down , left , and right going. View the article chapter pdf and any associated supplements and figures for a period of 48 hours.
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