Seismic time-lapse imaging using interferometric least-squares migration: Case study

Mrinal Sinha, Gerard T. Schuster

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Seismic time-lapse surveys are susceptible to repeatability errors due to varying environmental conditions. To mitigate this problem, we propose the use of interferometric least-squares migration to estimate the migration images for the baseline and monitor surveys. Here, a known reflector is used as the reference reflector for interferometric least-squares migration, and the data are approximately redatumed to this reference reflector before imaging. This virtual redatuming mitigates the repeatability errors in the time-lapse migration image. Results with synthetic and field data show that interferometric least-squares migration can sometimes reduce or eliminate artifacts caused by non-repeatability in time-lapse surveys and provide a high-resolution estimate of the time-lapse change in the reservoir.
Original languageEnglish (US)
Pages (from-to)1457-1474
Number of pages18
JournalGeophysical Prospecting
Volume66
Issue number8
DOIs
StatePublished - Sep 11 2018

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