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Approximate inversion of the wave-equation Hessian via randomized matrix probing 

Letourneau, Pierre-David; Demanet, Laurent; Calandra, Henri (Massachusetts Institute of Technology. Earth Resources Laboratory, 2012)
We present a method for approximately inverting the Hessian of full waveform inversion as a dip-dependent and scale-dependent amplitude correction. The terms in the expansion of this correction are determined by least-squares ...
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Nonlinear Frechet derivative and its De Wolf approximation 

Wu, Ru-Shan; Zheng, Yingcai (Massachusetts Institute of Technology. Earth Resources Laboratory, 2012)
We introduce and derive the nonlinear Frechet derivative for the acoustic wave equation. It turns out that the high order Frechet derivatives can be realized by consecutive applications of the scattering operator and a ...
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A unified framework for relative source localization using correlograms 

Poliannikov, Oleg V.; Prange, Michael; Malcolm, Alison E.; Djikpesse, Hugues (Massachusetts Institute of Technology. Earth Resources Laboratory, 2012)
We study the problem of determining an unknown event location relative to previously located events using a single monitoring array in a monitoring well. We show that using the available information about the previously ...
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Seismic imaging of hydraullically-stimulated fractures: A numerical study of the effect of the source mechanism 

Shabelansky, Andrey Hanan; Malcolm, Alison E.; Fehler, Michael; Bakku, Sudhish Kumar (Massachusetts Institute of Technology. Earth Resources Laboratory, 2012)
We present a numerical study of seismic imaging of hydraulically stimulated fractures using a single source from an adjacent fracturing-process. The source is either a point force generated from the perforation of the ...
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Annual Report 2012 Table of Contents 

Unknown author (Massachusetts Institute of Technology. Earth Resources Laboratory, 2012)
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Target-oriented Time-lapse Waveform Inversion using Virtual Survey 

Yang, Di; Zheng, Yingcai; Fehler, Michael; Malcolm, Alison E. (Massachusetts Institute of Technology. Earth Resources Laboratory, 2012)
Time-lapse seismic data are widely used for monitoring time-variant subsurface changes. Conventional analysis provides qualitative information by comparing results from consecutive surveys, whereas waveform inversion can ...
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Seismic characterization of fractured reservoirs using 3D double beams 

Zheng, Yingcai; Fang, Xinding; Fehler, Michael; Burns, Daniel R. (Massachusetts Institute of Technology. Earth Resources Laboratory, 2012)
We propose an efficient target-oriented method to characterize seismic properties of fractured reservoirs: the spacing between fractures and the fracture orientation. We use both singly scattered and multiply scattered ...
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Multipole seismoelectric logging while drilling (LWD) for acoustic velocity measurements 

Zhu, Zhenya; Wang, Jun; Toksoz, M. Nafi (Massachusetts Institute of Technology. Earth Resources Laboratory, 2012)
In seismoelectric well logging, an acoustic wave propagates along a borehole and induces electrical signals along the borehole wall. The apparent velocities of these seismoelectric signals are equal to the formation ...
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Source-Indexed Migration Velocity Analysis with Global Passive Data 

Burdick, S.; de Hoop, M. V.; van der Hilst, Robert D. (Massachusetts Institute of Technology. Earth Resources Laboratory, 2012)
The reverse-time migration of global seismic data generated by free-surface multiples is regularly used to constrain the crustal structure, but its accuracy is to a large extent determined by the accuracy of the 3-D ...
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Predicting stress-induced anisotropy around a borehole 

Fang, Xinding; Fehler, Michael; Zhu, Zhenya; Chen, Tianrun; Brown, Stephen; e.a. (Massachusetts Institute of Technology. Earth Resources Laboratory, 2012)
Formation elastic properties near a borehole may be altered from their original state due to the stress concentration around the borehole. This could result in a biased estimation of formation properties but could provide ...
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AuthorFehler, Michael (14)Fang, Xinding (7)Malcolm, Alison E. (7)Zheng, Yingcai (6)Burns, Daniel R. (5)Zhu, Zhenya (4)Brown, Stephen (3)Shabelansky, Andrey Hanan (3)Toksoz, M. Nafi (3)Bakku, Sudhish Kumar (2)... View MoreSubjectImaging (7)Fractures (6)Inversion (6)Modeling (6)Scattering (5)Interferometry (3)Logging (3)Microseismic (3)4D (2)Geothermal (2)... View MoreDate Issued
2012 (25)
Has File(s)Yes (25)

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