... It is an open discussion how distributed acoustic sensing (DAS)-derived images compare to geophone-derived vertical seismic profile (VSP) images. In the present study, we compare DAS migration images with geophone migration images for simulated DAS datasets in terms of the generalized Radon...

... schlumberger-private evaporite seg international exposition reflectivity reservoir characterization suez seismic imaging real data noise node full wavefield migration exploration geophysicist 10 joint migration inversion upstream oil & gas fwm workflow gulf Joint Migration...

... ABSTRACT In this paper, using a 2D realistic deep water synthetic model, we demonstrate a new angle-dependent migration workflow comprising full waveform inversion (FWI), joint migration inversion (JMI) and angle-dependent full wavefield migration (ADFWM). We will first point out that FWI-JMI...

...) body theory, we firstly derive the viscous acoustic equation that definitely separates the amplitude attenuation and phase distortion effects. The -compensated reverse time migration (RTM) and least square RTM (LSRTM) methods based on this equation are further developed. The instability problem...

... fidelity. Here we present a general optimization method for the alignment of partial images to mitigate the effects of complex scattering and complex wave behavior through salt. Although we do not claim that the method produces true amplitude fidelity, we have found that it can enhance migration images...

... Summary A new approximate migration weight is developed for Kirchhoff migration of converted-wave data. As with previous approximations it is based on the exact weight for a homogeneous medium. However, rather than assuming equality of travel path distances from source to image point...

... of diffraction wavefield. Acquiring dip-angle gathers of high quality is one of the key steps for diffraction separation in dip-angle domain. In this paper, two methods of extracting dip-angle gather based on Kirchhoff depth migration and Gaussian beam migration are presented. Meanwhile, we apply these two...

... SUMMARY The need for accurate seismic images over complex geological settings has driven the development of modern prestack depth migration algorithms, such as wave equation migration (WEM) and reverse-time migration (RTM). These algorithms can cope not only with strong and sharp seismic...

... prestack elastic inversion. CIGs can be obtained by reverse-time migration (RTM), as well as Kirchhoff migration. Some numerical models have been designed to test the amplitude-preservation of RTM or Kirchhoff migration, but differences between these two methods are not often discussed. And physical model...

... incident wavefield full bandwidth fwi reservoir characterization inversion upstream oil & gas anisotropic velocity estimation velocity model wavefield full wavefield migration full waveform inversion inversion algorithm depth level joint migration inversion delft university...

... SUMMARY Nonlinear reverse-time migration is a modified reverse-time migration that accounts for the nonlinear relation between seismic data and model in order to image multiply scattered waves including multiples. The illumination of multiply scattered aves yields a representation...

... workflow time migration operator reservoir characterization dip discrimination phenomenon migration de-migration migration prestack time migration yang co section annual international meeting output imaging scheme conventional cr stack diffraction upstream oil & gas reflection...

... joint deconvolution reservoir characterization receiver deconvolution ghost operator cggverita summary propagation notch reflectivity migration wavelet seg seg denver 2010 operator streamer acquisition spectra mirror migration amplitude Summary This paper focuses...

... attenuation and interference by the free surface. However, due to the limited number of receivers that can be placed downhole relative to a surface survey, and the subsequent narrow acquisition aperture and low CDP fold, VSP migration images from 2D Walkaway VSP (WVSP) or 3D VSP data often contain strong...

... beam prestack depth demigration synthetic data demigration reflector migration test model prestack depth demigration upstream oil & gas beam prestack depth migration depth demigration prestack depth migration international exposition gaussian beam migration depth migration...

... velocity analysis velocity value migration velocity analysis migration velocity multipath summation reservoir characterization migration international exposition landa velocity model weight function common-image gather multipath migration geophysics imaging upstream oil & gas...

... Abstract Reverse-time migration (RTM), being based on the two-way wave equation, can generate superior subsurface images in areas where other migration methods based on the Kirchhoff integral or the one-way wave equation cannot correctly image reflectors below complex overburdens such as salt...

... Abstract The development of reverse time migration (RTM) and the availability of wide-azimuth data have significantly increased our ability to image subsalt. Much of this potential, however, remains to be developed by seismic imagers. One area for future development is the incorporation...

... The Role of Reverse Time Migration in Imaging and Model Estimation Introduction The key depth imaging technology addressed in this article is Reverse Time Migration (RTM). It will be compared to Kirchhoff, beam and other wave equation migration (WEM) techniques. There will be an emphasis...

... upstream oil & gas vsp migration artifact migration artifact hornby subsalt sediment migration noise receiver local beam migration imaging migration result aperture vsp data reservoir characterization migration artifact diffraction reflector wavefield Summary VSP...