• Design of an efficient 4D full-waveform inversion (FWI) workflow • Regenerang the wavefield from saved boundaries • 4D FWI results • Reducing the memory cost by random phase encoding

Full-waveform inversion (FWI) of seismic data can provide high-resolution estimates of 4D change. We have adopted a new time-domain 2D acoustic time-lapse FWI method based on the central-difference scheme with higher order mathematical accuracy and …

We then compare the results of the 4D FWI with a conventional 4D processing workflow, discuss the advantages and disadvantages of each, and also highlight future considerations. Read the full article here.

GeoFWI offers Full Waveform Inversion (FWI) technology for high-resolution imaging and expert interpretation, accurate 4D steam chamber imaging and SAGD operation optimization. We specializes in Oil Sand heterogeneity characterization (IHS/Lean) and CCUS subsurface monitoring for carbon storage.

Time-lapse (4D) seismic surveys are devised to detect subsurface changes resulting from hydrocarbon production and fluid injection. Full-waveform inversion (FWI) of time-lapse seismic data has been reported to provide high-resolution estimates of 4D changes.

2025年2月5日 · In this paper we extend FWI imaging into 4D, outline several approaches for 4D FWI, discuss the pro's & con's of each and demonstrate these by applying each approach to a dense OBN survey in the North Sea.

We investigate the effectiveness of current 4D FWI strategies, such as the parallel, double-difference, sequential, and common-model strategies (CMS), in resolving nonrepeatability issues for 4D ocean-bottom cable (OBC) seismic data.

We present a local wave solver that accurately computes the solution of the wave equation within only a subdo-main of the region covered by the survey, representing a significant cost saving in the computation of full-waveform inversion.

Main objectives To present an integrated 4D FWI workflow based on the combination of reflection based “joint full waveform inversion” and simultaneous time lapse strategy for short offset data.

We show how this integrated hierarchical workflow is able to better estimates the 4D changes compared to the direct implementation of simultaneous time lapse FWI without the JFWI step.