... ABSTRACT No preview is available for this paper. salt body biondi nmo velocity dmo moveout common-offset cube reflection reservoir characterization velocity function migration time slice operator application annual internat nmo-velocity conflict amo constant-velocity dmo...

... Residual moveout (RMO) in the depth migrated common image gathers provides a measure of error in the migration velocity model. Accurate and efficient RMO picking is the key to the success of tomographic velocity model building workflows. Conventional RMO picking techniques are time-consuming...

... ABSTRACT Seismic anisotropy is present in different geological settings at various scales. This significantly affects the standard hyperbolic reflection moveout approximation that is based on the assumption that layers are isotropic. Conventional traveltime picking and velocity analysis...

... Station 3 Presentation Type: Poster phase correlation method marfurt artificial intelligence geophysics attribute-driven residual lateral moveout correction multiazimuth coherence velocity model lateral shift correction curvature spatial shift reservoir characterization registration...

... ABSTRACT We propose and demonstrate a novel application of dynamic time warping for correcting horizontally anisotropic moveout in image gathers, enhancing seismic images, and determining azimuthal anisotropic orientation and relative intensity. The method functions by first finding the shifts...

... ABSTRACT Post-migrated image gathers in the presence of unresolved azimuthal anisotropy and residual velocity error exhibit complicated moveout. However, it is possible to measure the move- out and invert/update model properties such as velocity and anisotropy. Azimuthal anisotropy can...

... ABSTRACT We show how vertical downhole distributed acoustic sensing arrays can be used for P- and S- velocity analysis along the array. Using such velocity models, the array can be used in an effective moveout-based earthquake detection approach. We demonstrate both applications on 20 days...

... ABSTRACT Considering symmetric moveout where the traveltime is an even function of the offset or horizontal slowness, the local and global fourth-order normal moveout (NMO) series are governed by the normal-incidence time and eight effective parameters: three second-order and five fourth...

... for velocity anomalies in the near-surface for time migration. Reflection statics are calculated because often the lack of detailed near-surface information leads to inaccuracies. A normal moveout (NMO) velocity field is picked and applied to stack the data in preparation for the reflection statics...

... ABSTRACT We propose a new moveout approximation based on an alternative background model. The standard approach is based on elliptical background model with two velocities, vertical and normal moveout ones. We suggest to use another elliptical background model defined with vertical...

...Normal moveout velocity ellipse inversion in tilted orthorhombic media Yuriy Ivanov and Alexey Stovas, Norwegian University of Science and Technology SUMMARY The normal moveout velocity (NMO) ellipse is a powerful tool in seismic processing and inversion. In tilted orthorhombic (TOR) media...

... URTeC: 2455484 Joint Anisotropic Parameter Inversion Based on Nonhyperbolic Moveout and Azimuthal Amplitude Variance Fangyu Li*, Jie Qi, Bin Lyu, Kurt J. Marfurt, University of Oklahoma. Copyright 2016, Unconventional Resources Technology Conference (URTeC) DOI 10.15530-urtec-2016-2455484...

... Summary Moveout approximations are commonly used in velocity anaysis and time-domain seismic imaging. We revisit the previously proposed generalized nonhyperbolic moveout approximation and develop its extension to 3D. The advantages of the generalized approximation are its high accuracy...

... traveltime c-wave exploration new equation traveltime approximation vertical inhomogeneity media equation upstream oil & gas reservoir characterization thomsen approximation accuracy seg denver 2014 coal seam geophysics coalfield moveout equation exploration Summary...

... Summary Typically VTI model parameter estimation is achieved through multiple iterations of depth migration, residual moveout estimation, and linearized tomography. In this paper we discuss a method to reduce the effort of migration and residual moveout estimation by applying local...

... Summary Reflection tomography utilizes the kinematic information measured on reflection events present in seismic images in order to build better migration velocity models. The standard methodology consists of performing moveout analysis by picking the reflection events in the pre-stack...

...SPWLA 55th Annual Logging Symposium, May 18-22, 2014 1 ACOUSTIC DISPERSION FROM PHASE MOVEOUT IN ARRAY SONIC DATA S. Assous & P. A. S. Elkington, Weatherford Copyright 2014, held jointly by the Society of Petrophysicists and Well Log Analysts (SPWLA) and the submitting authors. This paper...

... receiver migration seg houston 2013 reservoir characterization residual moveout extreme point equation university migration velocity cig upstream oil & gas ellipse reflector depth migrated trace interval velocity velocity model velocity analysis geometry receiver depth...

... SUMMARY We extend a methodology for migration velocity improvement and diffraction localization to nonzero offset. The method is based on a moveout analysis of over- or undermigrated diffraction events in the depth domain. It does not depend on any requirements apart from identifyable...

... SUMMARY Residual moveout based wave-equation migration velocity analysis uses residual moveout to characterize the kinematic error caused by the inaccurate velocity model, and computes velocity updates using wave-equation tomographic operators. However, the per iteration cost of this method...