..., overlooked in current depositional models. reservoir characterization bedform antidune compensational laboratory experiment topography american association international extension sedimentology casey meirovitz exploration geophysicist plastic sediment suspension upstream oil & gas...

... topography international society equation upstream oil & gas abc interpolation formula wavefield modeling american association energy 10 absorption reservoir characterization exploration geophysicist applied geoscience fractional node interface quadratic interpolation...

..., complex topography or bathymetry can cause numerical complications when discretization is performed on rectangular grids. To take into account complex known geometries in a versatile and accurate way, we calculate slopes and traveltimes of locally-coherent events with a finite-difference (FD) factored...

... that the combination of topography Poor image quality of seismic data acquired from and lateral heterogeneity introduces strong mountainous regions in China imposes a big scattering of surface waves, which severely challenge to oil and gas exploration and field disrupts the shallow records and obscures deeper...

... modeling exploration geophysicist 10 operator staggered grid reservoir characterization geophysics seg international exposition interface equation upstream oil & gas seafloor elastic imaging topography curvilinear coordinate boundary condition implementation grid harmonic...

... raypath seg international exposition reservoir characterization direct ray velocity difference surface velocity distribution velocity distribution grid resolution receiver exploration geophysicist 10 tomography upstream oil & gas topography traditional tomography geophysics ray...

... Seismic imaging algorithms face significant practical and numerical challenges when migrating multicomponent seismic data acquired from irregular topography. Most of these issues can be avoided by abandoning the Cartesian coordinate system and migrating the data in a generalized topographic...

... topography Strong surface and guided waves in land seismic data often distort signals from deeper structures, leading to poor S/N. Accurate modeling and attenuation of aliased surface waves has been a long-standing challenge in onshore seismic processing and imaging. To address this issue, we propose...

... utilized for static correction which is necessary for land seismic data processing. Land data, which involve elevation variations, require to consider irregular topography carefully when performing the wave-equation-based traveltime tomography. In this study, in order to express the irregular topography...

... ABSTRACT Irregular topography can cause strong scattering and defocusing of propagating surface waves. Thus it is important to consider such effects when inverting surface waves for the shallow S-velocity structures. We present a 3D surface-wave dispersion inversion method that takes...

... in GeoPark, Florida, is used with topography for the numerical experiments. This approach successfully finds out the subsurface velocity models under the irregular free surface. Presentation Date: Tuesday, September 17, 2019 Session Start Time: 1:50 PM Presentation Time: 3:30 PM Location: 217C...

...Rough topography & complex subsurface geology. A case study using Common Reflection Surface (CRS) processing and Reverse Time Migration (RTM) to enhance seismic imaging Guido Gierse* and Thomas Fieseler, TEECsolutions GmbH, Sandra Arevalo, TEECsolutions LLC, Hector Alfonso and Jeny Navarro...

... in practical CSEM surveys. In such cases, reliable data interpretation requires a knowledge of quantitative estimates of the influence of topography and electrical anisotropy on CSEM data. In this study, we have developed a finite element CSEM modeling scheme and investigated the effects of anisotropy...

... ABSTRACT We propose to use a curvilinear grid with a finite-difference method to solve the wave equation and simulate wavefield propagation in the presence of a curved topography for seismic imaging and inversion. With our method, the curvilinear grid is designed to stretch the surface...

... domains influenced by, e.g., free-surface topography. We define a coordinate mapping assuming vertically deformed meshes that allows us to transform an irregular physical domain to a regular computational grid on which FD solutions are straightforward to calculate. Our rotated staggered grids (RSG...

... of the most primitive approaches (e.g., migration-from-flat-datum or migration from topography while populating the shallow model with a spatially homogenous "replacement" velocity), the migrated gathers exhibit significant residual moveout, and applying a tomographic velocity update to improve flattening...

... ABSTRACT Geophysical imaging in the foothills environment is typically hampered by complex structures, and the high cost of data acquisition in poorly accessible, rugged topography. Seismic imaging is particularly difficult due to poor signal penetration, steeply dipping structures...

..., we developed an improved Gaussian beam prestack depth migration method, directly calculating the local plane wave decomposition and wave-field continuation starting from rugged topography. To get backward extrapolation of the wave-field, Rayleigh II integration and Green function of Gaussian beam...

... reflection, after conventional processing, Prestack Depth Migration(PSDM) on rugged topography gave a better image that could be used to recognize related faults and their internal structures. For CSAMT, inversion with topography was conducted. These results provide interpretation images in the same image...

... topography on deformed staggered grids : Geophysics , 79 , no . 3 , T125 – T141 , 10.1190/geo2013-0371.1 . Fornberg , B. , 1988 a , The pseudospectral method: Accurate representation of interfaces in elastic wave calculations : Geophysics , 53 , 625 – 637 , 10.1190...