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Targeted nullspace shuttling in time-lapse full-waveform inversion

Scott D. Keating and Kristopher A. Innanen
Targeted nullspace shuttling in time-lapse full-waveform inversion
Geophysics (December 2024) 89 (6): R541-R549

Abstract

Time-lapse inversion plays an important role in monitoring applications. Uncertainties in seismic inversion mean that there are many time-lapse changes in subsurface properties consistent with a given time-lapse data set and monitor survey, including changes that are implausible given our prior knowledge. Many existing time-lapse inversion methodologies that aim to minimize spurious differences while preserving real changes are equivalent to undirected navigation about the inversion nullspace. We develop an approach that explicitly navigates the inversion nullspace to find the data-consistent time-lapse model that best satisfies our prior knowledge. In synthetic examples, this approach demonstrates a significant capacity to mitigate the effects of nonreproducible noise and changing acquisition and to identify when time-lapse differences fall below the confidence threshold described by nullspace shuttling.


ISSN: 0016-8033
EISSN: 1942-2156
Coden: GPYSA7
Serial Title: Geophysics
Serial Volume: 89
Serial Issue: 6
Title: Targeted nullspace shuttling in time-lapse full-waveform inversion
Affiliation: ETH Zurich, Zurich, Switzerland
Pages: R541-R549
Published: 202412
Text Language: English
Publisher: Society of Exploration Geophysicists, Tulsa, OK, United States
References: 27
Accession Number: 2024-086701
Categories: Applied geophysics
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. sects.
Secondary Affiliation: University of Calgary, CAN, Canada
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2024, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States. Reference includes data supplied by Society of Exploration Geophysicists, Tulsa, OK, United States
Update Code: 2024
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