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DIRECT AND INDIRECT INVERSION AND A NEW AND COMPREHENSIVE PERSPECTIVE ON THE ROLE OF PRIMARIES AND MULTIPLES IN SEISMIC DATA PROCESSING FOR STRUCTURE DETERMINATION AND AMPLITUDE ANALYSIS
Arthur B Weglein

Abstract: The removal and use of multiples have a single shared goal and objective: the imaging and inversion of primaries. There are two kinds of primaries: recorded primaries and unrecorded primaries. For imaging recorded primaries using an industry standard practice

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OPTIMAL CODING OF BLENDED SEISMIC SOURCES FOR 2D FULL WAVEFORM INVERSION IN TIME

Abstract: Full Waveform Inversion (FWI) schemes are gradually becoming more common in the oil and gas industry, as a new tool for studying complex geological zones, based on their reliability for estimating velocity models. FWI is a non-linear inversion method that ite

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INTEGRAL MODELLING OF PROPAGATION OF INCIDENT WAVES IN A LATERALLY VARYING MEDIUM: AN EXPLORATION IN THE FREQUENCY DOMAIN

Abstract: In this work we present a formalism that intends to solve the problem of modeling wave propagation in the context of seismic inversion. The formalism is based on the linear perturbation theory of Cauchy's equations. Based on the foregoing, we derived an equiv

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NUMERICAL CONSIDERATIONS ON THE MODELING OF SOURCE AND BOUNDARY CONDITIONS FOR THE FREQUENCY DOMAIN VISCO-ACOUSTIC WAVE EQUATION SOLUTION
Sheryl Avendaño J. C. Muñoz-Cuartas

Abstract: Seismic modeling is an important step in the process used for imaging Earth subsurface. Current applications require accurate models associated with solutions of the wave propagation equation in real media. Unfortunately, it is common not to find in the techn

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INTERPOLATION AND DENOISING OF SEISMIC SIGNALS USING ORTHOGONAL MATCHING PURSUIT ALGORITHM: AN APLICATION IN VSP AND REFRACTION DATA

Abstract: An implementation of the Orthogonal Matching Pursuit (OMP) algorithm was used and the results obtained therefrom are presented for simultaneous interpolation and denoising from seismic signals in the framework of sparse signal representation. OMP is an algori

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APPLICATION OF THE CONTINUOUS WAVELET TRANSFORM IN THE EXTRACTION OF DIRECTIONAL DATA ON RTM IMAGING CONDITION WAVEFIELDS

Abstract: Low-frequency artifacts in reverse time migration result from unwanted cross-correlation of the source and receiver wavefields at non-reflecting points along ray-paths. These artifacts can hide important details in migrated models and increase poor interpreta

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COMPARATIVE ANALYSIS OF 3D RTM IMPLEMENTATION STRATEGIES FOR AN EFFICIENT USE OF MEMORY IN A SINGLE GPU

Abstract: Reverse-Time Migration (RTM) is a two-way wave-equation based method used to generate images of the Earth's subsurface. RTM has been successfully used in seismic imaging as it allows defining complex structural areas. However, RTM is a highly computational ex

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FULL WAVEFORM INVERSION IN GENERALIZED COORDINATES FOR ZONES OF CURVED TOPOGRAPHY

Abstract: Full waveform inversion (FWI) has been recently used to estimate subsurface parameters, such as velocity models. This method, however, has a number of drawbacks when applied to zones with rugged topography due to the forced application of a Cartesian mesh on

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ACCELERATED 2D FWI USING THE SYMMETRY ON INNER PRODUCT SPACES

Abstract: Full Waveform Inversion (FWI) is a common technique used in the oil and gas industry due to its capabilities to estimate subsurface characteristics such as material's density and sound velocity with high resolution. The 2D time domain FWI method involves the

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A GPU IMPLEMENTATION OF THE SECOND ORDER ADJOINT STATE THEORY TO QUANTIFY THE UNCERTAINTY ON FWI RESULTS

Abstract: The second order scattering information provided by the Hessian matrix and its inverse plays an important role in both, parametric inversion and uncertainty quantification. On the one hand, for parameter inversion, the Hessian guides the descent direction suc

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