Blar i Bergen Open Research Archive på tidsskrift "Geophysical Prospecting"

Viser treff 1-6 av 6

    • Homotopy scattering series for seismic forward modelling with variable density and velocity 

      Xiang, Kui; Eikrem, Kjersti Solberg; Jakobsen, Morten; Nævdal, Geir (Journal article; Peer reviewed, 2021)
      We have derived a convergent scattering series solution for the frequency-domain wave equation in acoustic media with variable density and velocity. The convergent scattering series solution is based on the homotopy analysis ...

    • A matrix-free variant of the distorted Born iterative method for seismic full-waveform inversion 

      Xiang, Kui; Jakobsen, Morten; Eikrem, Kjersti Solberg; Nævdal, Geir (Journal article; Peer reviewed, 2023)
      The distorted Born iterative method reduces a nonlinear inverse scattering problem to a sequence of (ill-posed) linear inverse scattering problems that can be solved using a regularized least-squares formulation. This ...

    • Microseismic wavefield modelling in anisotropic elastic media using integral equation method 

      Shekhar, Ujjwal; Jakobsen, Morten; Iversen, Einar; Berre, Inga; Radu, Florin Adrian (Journal article; Peer reviewed, 2023)
      In this paper, we present a frequency-domain volume integral method to model the microseismic wavefield in heterogeneous anisotropic-elastic media. The elastic wave equation is written as an integral equation of the ...

    • Point-spread function convolution to simulate prestack depth migrated images: A validation study 

      Jensen, Kristian; Lecomte, Isabelle Christine; Gelius, Leiv-J.; Kaschwich, Tina (Journal article; Peer reviewed, 2021)
      Seismic migration commonly yields an incomplete reconstruction of the Earth model due to restricted survey aperture, band-limited frequency content and propagation effects. This affects both illumination and resolution of ...

    • Seismic on floating ice: data acquisition versus flexural wave noise 

      Johansen, Tor Arne; Ruud, Bent Ole; Tømmerbakke, Ronny; Jensen, Kristian (Journal article; Peer reviewed, 2019)
      Geophysical surveying of the Arctic will become increasingly important in future prospecting and monitoring of the terrestrial and adjacent areas in this hemisphere. Seismic data acquired on floating ice are hampered with ...

    • Source and receiver deghosting by demigration-based supervised learning 

      Jonge, Thomas de; Vinje, Vetle; Zhao, Peng; Poole, Gordon; Iversen, Einar (Journal article; Peer reviewed, 2022)
      Deghosting of marine seismic data is an important and challenging step in the seismic processing flow. We describe a novel approach to train a supervised convolutional neural network to perform joint source and receiver ...