... geophysicist 10 wave propagation equation das measurement applied geoscience gauge length inversion desert environment das impedance amplitude amplitude-based das Amplitude-based DAS logging: turning DAS VSP amplitudes into subsurface elastic properties Vladimir Kazei , Konstantin Osypov...

... operator reservoir characterization applied geoscience exploration geophysicist 10 interface wave interface equation approximation boundary part operator fluid-solid interface upstream oil & gas finite difference approximation mattsson wave propagation sbp operator Acoustic-elastic...

... geophysicist 10 reservoir characterization upstream oil & gas inversion result neural network applied geoscience annual international conference viscoelastic media recurrent neural network tv regularization qc 44 surface acquisition wave propagation machine learning deep learning acquisition...

... We propose a deep learning framework to simulate the effect of boundary conditions for wave propagation in anisotropic media. To overcome the challenges associated with stability of conventional implementation of boundary conditions for strongly anisotropic media, we propose an efficient...

... Wave propagation in rocks creates fluid pressure gradients and a local flow between stiff pores and compliant pores, which cause wave velocity dispersion. Dvorkin et al. (1995) derived a model, hereafter referred to as Dvorkin (1995) model, to explain this phenomenon. Based on this theory, we...

... machine learning upstream oil & gas reservoir characterization wave equation exploration geophysicist 10 physics informed neural network neural network seg international exposition wave propagation artificial intelligence training data informed neural network dimitri voytan loss...

... drilling equipment signal-to-noise ratio boundary bit selection drill pipe selection autocorrelation synthetic gather modeling vibration sensor poletto drillstring design exploration geophysicist 10 upstream oil & gas wavefield wave propagation seg international exposition propagation...

... reflectivity modeling single-scattering wave modeling method modeling formula gaussian beam shot gather seg international exposition gb-born modeling reservoir characterization efficiency wavefield wave propagation traveltime Born modeling for single-scattering waves in 2D visco-acoustic medium...

... ABSTRACT Elastic wave propagation is highly complex when P- and S-waves scatter away and convert to each other at the discontinuities in the medium. Conventional elastic wave simulation methods often model particle displacement/velocity fields due to both P- and S-wave propagation...

... ABSTRACT The finite-difference (FD) scheme is widely used to model acoustic and elastic wave propagation. However, the numerical dispersion will affect the accuracy and efficiency of the modeling due to approximate the differential operator with the difference operator. In this abstract, a new...

... ABSTRACT A new wave equation for modeling acoustic wave propagation in attenuating anisotropic media is developed. The wave equation expressed by decoupled fractional Laplacians can describe separated amplitude loss and phase dispersion effects, respectively. For numerical simulations...

..., such as reverse time migration (RTM) or full waveform inversion (FWI). In this paper, we developed an RTM application based on P and S wave single mode wave propagations in anisotropic media (Xu et al., 2018). The algorithm may be considered as an asymptotic approximation of elastic wave equations, which...

... flat fracture fracture geometry fluid viscosity frequency fracture model chouet wave propagation reservoir characterization krauklis wave propagation krauklis wave fracture upstream oil & gas sequence shampoo geometry propagation pixel value hydraulic fracturing group...

... diffraction wave propagation migration d-data imaging wave propagation characteristic reservoir characterization approximation seg international exposition upstream oil & gas equation annual international meeting Bansal , R. , and M. G. , Imhof , 2005 , Diffraction...

... propagation approximation seg international exposition reservoir characterization conventional lrdm geophysics viscoacoustic wave equation vti attenuative media viscoacoustic wave modeling media wave propagation modeling dispersion amplitude dissipation isotropic media wave...

...: Tuesday, September 17, 2019 Session Start Time: 1:50 PM Presentation Time: 3:55 PM Location: 217D Presentation Type: Oral axis tsvankin intensity crampin anisotropic azimuth geophysics media upstream oil & gas wave propagation depth slice seismic image seg international...

... accuracy. Therefore, a simple equivalent anisotropic model is developed which could be used both in laboratory and field experiment for cross-dipole acoustic logging. The results could also help to understand the dipole wave propagation in the heterogeneous formation. Presentation Date: Monday, September...

... approaches are commonly formulated as the adjoint instead of the inverse operator of the forward modeling. In addition, intrinsic attenuation introduces amplitude loss and phase dispersion during wave propagation. Without considering these effects, migrated images are kinematically and dynamically incorrect...

... ABSTRACT To establish a consistent framework for seismic wave propagation that honors the effects of stress changes, it is critical that we take into account different types of stress measures and their corresponding effects on seismic quantities (e.g., velocities) as dictated by continuum...

... on the elastic equation of motion. A major potential application of DAS fibre with complex shape/directionality response is in detaile sensing of microseismic source characteristics and focal mechanisms. In this paper we couple models of moment tensor source, 3D finite difference elastic wave propagation...