Acoustic–Elastic Coupled Equations for Joint Elastic Imaging of TS and Sparse OBN/OBS Data

Yu, Pengfei; Sun, Minao

doi:10.1007/s00024-021-02899-5

Cited by 2 publications

(1 citation statement)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Because OBN/OBS is still expensive to deploy densely, a scheme of a joint towed streamer and OBN/OBS acquisition has been successfully applied (Yang and Zhang, 2019;Yu and Sun, 2022). One of its advantages is that the towed streamer and OBN/OBS simultaneously receive seismic waves from the subsurface (Figure 1).…”

Section: Introductionmentioning

confidence: 99%

Joint towed streamer and ocean-bottom-seismometer data multi-parameter full waveform inversion in acoustic-elastic coupled media

2023

View full text Add to dashboard Cite

Short-offset towed streamer data, and sparse ocean-bottom seismometer (OBS) data are not conducive to applying multi-parameter full waveform inversion (FWI) in production. It is challenging to reconstruct deep velocity in the former, and the latter suffers from severe acquisition footprints. We developed a joint acoustic-elastic coupled full waveform inversion (J-AEFWI) method, in which towed streamer data and ocean-bottom seismometer data were used jointly to build P-wave and S-wave velocity models. A new joint objective function was established using the least-squares theory, and the joint acoustic-elastic coupled full waveform inversion method on the acoustic-elastic coupled equation was derived. The method can inject the residuals of the towed streamer data and the ocean-bottom seismometer data in time backward propagating to update P-wave and S-wave velocity models. The synthetic experimental results show that joint acoustic-elastic coupled full waveform inversion obtains more accurate results than when using these two types of data alone. Compared to using the towed streamer or ocean-bottom seismometer data alone, the joint acoustic-elastic coupled full waveform inversion method leads to better illumination of the deep background velocities and suppression of acquisition footprints. The results of joint acoustic-elastic coupled full waveform inversion were slightly better than those of the cascaded full waveform inversion strategy. To further demonstrate the benefit of the proposed method, we applied it to the field data, and better results are obtained as expected.

show abstract

Section: Introductionmentioning

confidence: 99%

Joint towed streamer and ocean-bottom-seismometer data multi-parameter full waveform inversion in acoustic-elastic coupled media

2023

View full text Add to dashboard Cite

show abstract

Elastic common-receiver Gaussian beam migration of 4C ocean-bottom node data

Shi

Mao

et al. 2023

GEOPHYSICS

View full text Add to dashboard Cite

Four-component (4C) ocean-bottom node (OBN) surveys provide an opportunity to image subsurface elastic properties for oil and gas exploration in deep water environments. However, sparse acquisition sampling is challenging for high-quality imaging of OBN data. To alleviate this problem, we present a common-receiver domain 4C elastic Gaussian beam migration method based on an elastic reciprocity transformation that considers the monopole/dipole characters of both sources and receivers. Common-receiver migration is also computationally efficient in the OBN survey which has the number of shots usually larger than the number of geophones. We accomplish P/S and upgoing/downgoing wavefield decompositions at the source-side during migration. A decomposition matrix and a wavefield continuation formula are derived from the elastic Kirchhoff-Helmholtz integral with the representation of Greens function as a superposition of Gaussian beams. The local slant stack is performed on the better-sampled common-receiver recordings, which is less sensitive to aliasing. We validate the performance of the method on synthetic data using the case of coarse sampling of OBNs in both deep and ultra-deep water environment.

show abstract

Acoustic–Elastic Coupled Equations for Joint Elastic Imaging of TS and Sparse OBN/OBS Data

Cited by 2 publications

References 23 publications

Joint towed streamer and ocean-bottom-seismometer data multi-parameter full waveform inversion in acoustic-elastic coupled media

Joint towed streamer and ocean-bottom-seismometer data multi-parameter full waveform inversion in acoustic-elastic coupled media

Elastic common-receiver Gaussian beam migration of 4C ocean-bottom node data

Contact Info

Product

Resources

About