Full waveform inversion (FWI) is an emerging subsurface imaging technique, used to locate oil and gas bodies. The key challenges that hinder its adoption by industry are both algorithmic and computational in nature, including storage, communication, and processing of large-scale system matrices, which impose cardinal impediments upon computational scalability. In this work we will present a com...

Wavefield energy can be measured by the so-called energy norm. Using this norm, we propose an imaging condition that represents the total reflection energy and accounts for wavefield directionality in space-time, thus enabling us to attenuate backscattering artifacts in reverse-time migration (RTM). This imaging condition has the flexibility to attenuate any selected angle, and by exploiting th...

Renewable energy resources can indisputably minimize the threat of global warming and climate change. However, they are intermittent and need buffer storage to bridge the time-gap between production (off peak) and demand peaks. Based on geologic and geochemical reasons, the North German Basin has a very large capacity for compressed air/gas energy storage CAES in porous saltwater aquifers and s...

Full waveform inversion (FWI) strongly depends on an accurate starting model to succeed. This is particularly true in the elastic regime: The cycle-skipping phenomenon more severe FWI compared acoustic FWI, due short S-wave wavelength. In this paper, we extend our work extrapolated (EFWI) by proposing synthesize low frequencies of multi-component seismic records, and use those "artificial" seed...

Local full-waveform inversion (FWI) methods use redatumed seismic responses of virtual receivers within the subsurface to build local objective function based on convolution-type representation theorem. The Marchenko method is widely used obtain data. only requires a smoothed velocity model with correct kinematic characteristics for redatuming single-sided reflection However, standard insensiti...

*Head, Census information Center and biostatistician, institute of interdisciplinary Research, †Affiliate Researcher, Institute of Interdisciplinary Research and Professor, Department of Chemistry, university of Puerto Rico at Cayey; ‡tRAmil Scientific Coordinator, Department of Biology, Faculty of Science, University of French Antilles and Guyana, UAG UFR SEN BP 592, 97159 Pointe à Pitre, Guad...

A receiver-extension strategy is presented as an alternative to recently promoted source-extension strategies, in the framework of high-resolution seismic imaging by full-waveform inversion (FWI). This directly applicable time-domain FWI, and, unlike methods, it incurs negligible extra computational cost. After connections between different strategies are reviewed, method introduced and analyze...