... datum moveout upstream oil & gas application migration datum correction modeling prestack depth migration ground surface high wave number moveout Alkhalifah, , T. , and C. , Bagaini , 2004 , Cost-effective datuming in presence of rough topography and complex near...

..., 2019 Session Start Time: 9:20 AM Presentation Start Time: 11:25 AM Location: Poster Station 10 Presentation Type: Poster layer velocity model upstream oil & gas geophysics reservoir characterization compensation prestack depth migration absorption imaging litho-stratigraphic...

...: Poster near-surface model velocity model turning-ray tomography topography iteration study area reflection tomography tomography reservoir characterization annual meeting application joint tomography prestack depth migration seg 10 velocity-depth model imaging upstream oil...

... configurations for a new velocity model for which a raytracing set as required for a Kirchhoff prestack depth migration is available. The resulting transformations can be utilized to estimate various mapped prestack migrations and information about the positional bias, the validity of the velocity model...

.... A refraction statics model would not delineate the slower velocities. The FWI derived velocity model is used as input model in the prestack depth migration to delineate the near surface and subtle image reflections one of which is the brackish water bearing Santa Rosa formation. The Santa Rosa fluvial...

... migration methods have made great progress over the past decades. In general, there are two basic categories of prestack depth migration for the multi-wave and multicomponent seismic data: scalar migration and elastic migration. The former method first separates the elastic seismic data into P- and S-waves...

...-domain prestack depth migration in this paper. Using the input velocity field information, we firstly derive an adaptive focused beam parameter, which makes a seismic beam focused along the whole ray and improves the wave-field construction accuracy in both the shallow and the deep regions. Then, we...

... to the P wave depth model as possible. Finally, we applied prestack depth migration to produce migrated depth images. The results show that the events in PP and PS depth images are well correlated. In this approach, the model building is straightforward and the approach is practical. A model-based...

... presenting the azimuthal amplitude results. Azimuthal interval velocities derived from azimuthal prestack depth migrated data provide insight into the in-situ horizontal stress field. The success of the hydraulic stimulations depended upon having a low minimum horizontal stress and the presence of natural...

... Summary A complex-beam method has been developed for shot-domain prestack depth migration. The method is flexible with input geometry and accurate in imaging multipathing arrivals. It is especially useful for depth imaging of geologically complex land areas, where data-acquisition geometries...

... algorithm. upstream oil & gas reflector pswave tsvankin tomography prestack depth migration initial model anisotropy parameter volve field reservoir characterization algorithm media statoil vti model seg houston 2013 velocity analysis reflection tomography wang moveout...

...Ray-based prestack depth migration for orthorhombic media Xin Cheng*, Jun Tang, Olga Zdraveva, Can Evren Yarman and James Hobro, WesternGeco Summary We develop a ray-based prestack depth migration algorithm for general anisotropic media. We demonstrate the capability of our algorithm...

... and amplitude loss due to shallow absorption, thus improving structure imaging and potentially accurate AVO/DHI analysis underneath shallow gas. reservoir characterization annual international meeting migration prestack depth migration upstream oil & gas compensation case study shallow gas...

... ABSTRACT The dreamlet method adds the time-frequency localization to the frequency domain beamlet method by an additional wavelet transform along the time axis. This method has been applied to shot-profile prestack depth migration and shows great potential on wavefield compression and good...

... synthetic data set from a 3D syncline model. The method is also applied to fine tune the velocity model for a marine field data set. hybrid tomography migration annual international meeting stereotomography prestack depth migration field data postmigration tomography inversion wavelet tilted...

... to be corrected in a prestack depth migration. Based on the dispersion relation under a linear attenuation assumption, we derive a visco-acoustic wave equation in the time domain and apply it in a prestack reverse time migration to compensate for the anelastic effects in the seismic data. The equation is defined...

... reservoir characterization time migration seismic wave propagation attenuation prestack depth migration migration dispersion pstm upstream oil & gas equation wave finite difference time migration geophysics opw pstm seg seg denver 2010 annual international meeting geophysical...

...CRS-beam PSDM : Kirchhoff-beam prestack depth migration using the CRS operator German Garabito*, UFRN/Brazil, Carlos A. S. Ferreira, ANP/SEP/Brazil, João C. R. Cruz, UFPA/Brazil. Summary Beam-migration methods efficiently extend the benefits of Kirchhoff migration and enhance its imaging accuracy...

... to be difficult for mapping structures (Zhu et al., 2009). In this study we first improved shallow seismic images by estimating near-surface P-wave velocities through turning- ray tomography followed by noise attenuation and prestack depth migration. Second, we attempted to enhance reservoir level structures...

.... Introduction Ross Hill published seminal works in common offset Gaussian Beam prestack depth migration (Hill, 1991 and 2001). Chevron has been largely the only beneficiary of the Gaussian beam technology. To the best of our knowledge there have been no published work on Gaussian beam prestack demigration...