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Thursday, April 23, 2020 | History

2 edition of Exact waveform inversion of seismic reflection data. found in the catalog.

Exact waveform inversion of seismic reflection data.

Nina Diane Bregman

Exact waveform inversion of seismic reflection data.

  • 294 Want to read
  • 37 Currently reading

Published .
Written in English

    Subjects:
  • Physics Theses

  • Edition Notes

    Thesis (M.c.), Dept. of Physcis, University of Toronto

    ContributionsChapman, C.H. (supervisor)
    The Physical Object
    Pagination91 leaves
    Number of Pages91
    ID Numbers
    Open LibraryOL14743971M

    Extracting information from seismic data requires knowledge of seismic wave propagation and reflection. The commonly used method involves solving linearly for a reflectivity at every point within the Earth, but this book follows an alternative approach which invokes inverse scattering theory. waveform inversion analyses. It well work for real tele-seismic data set. We can get a plausible solution without the Non-Negative constraint. (=> high resolution) L2-norm is not good criterion of solution. It’s critical in large earthquake analysis such Tohoku-oki earthquake. Using seismic interferometry, the passive seismic data recorded on surface can be converted into the virtual source records that are similar to the active source seismic data. When used for full waveform inversion (FWI), compared with the direct use of the original passive seismic data, the use of the virtual source records can solve the Author: Pan Zhang, Liguo Han, Qixin Ge. Waveform inversion and rock physics methods for quantitative 4D seismics Morten Jakobsen, Velocity model inverted from noiseless seismic waveform data (DBIT) Velocity model inverted from noisy seismic waveform data (DBIT, SN = 20 dB) Elastic wave equation. Actual and reference media.


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Exact waveform inversion of seismic reflection data. by Nina Diane Bregman Download PDF EPUB FB2

This is the first book of its kind on seismic amplitude inversion in the context of reflection tomography. The aim of this monograph is to advocate the use of ray-amplitude data, separately or Author: Yanghua Wang.

3) Computation of the residual data; 4) Computation of the gradient of the cost function; 5) Update of the velocity model to m. 0 updated. In order to focus on the reflected wavefield the direct and refracted waves are muted in GG. Our proposed inversion method is named Seismic Reflection Full File Size: KB.

Full Waveform Inversion Full-Waveform Inversion (FWI) derives high-resolution velocity models by minimizing the difference between observed and modeled seismic waveforms. It goes beyond refraction and reflection tomography techniques, which use only the travel time kinematics of the seismic data, by using additional information provided by the.

A Exact numerical integration and the Full Seismic Waveform Modelling and Inversion; A series of experiments is conducted on the synthetic seismic reflection data to evaluate the Author: Andreas Fichtner.

Time domain full waveform inversion of seismic data for the East Sea, Korea, using a pseudo-Hessian method with source estimation: X. Chen, L. Han, H. Yang and S. Shang qP wave numerical simulation in viscoelastic VTI media by one-way wave equation.

Full waveform inversion (FWI) is a data matching procedure which attempts to use the whole wavefield to obtain quantitative information about the subsurface. If the exact physical properties of the subsurface are known, it should be possible to generate synthetic data which exactly match the measurements made in a seismic survey, provided that.

ear elastic inversion data ABSTRACT ion of seismic reflection 'ient generality using the its roughest formulation, of obtaining the Earth data best fit the observed model is used, this best of the Earth's interior. ed for describing a per- the density p(x) and the l), or the density p(x) and cities a(x) and ß(x).

The leutral, in the sense that. Full waveform inversion of seismic waves reflected in a stratified porous medium Gélis et al.

) for seismic reflection data is to partition the data sets according to source–receiver offset and recording time, and possibly temporal frequency. The inversion is then carried out in successive runs, by first including the early arrivals Cited by: of seismic waves through heterogeneous media is modelled accurately.

Furthermore, numerical solutions provide complete seismic waveforms that can be exploited for the benefit of improved tomographic resolution, without the need to identify specific seismic phases. For an extensive review of full waveform inversion, the reader is referred to.

This category makes up the chapter exercises from Öz Yilmaz's Seismic Data Analysis book, published in Pages in category "Exercises" The following 11 pages are in this category, out of 11 total. Buy Full Seismic Waveform Modelling and Inversion a variety of case studies on all scales from local to global based on a large number of examples involving real data.

It is a comprehensive reference on full waveform tomography for advanced students, researchers and by: This is the first book of its kind on seismic amplitude inversion in the context of reflection tomography.

The aim of the monograph is to advocate the use of ray-amplitude data, separately or jointly with traveltime data, in reflection seismic emphasis of seismic exploration is on imaging techniques, so that seismic section can be interpreted directly as a geological section.

Application to Synthetic Seismic Data [10] To apply equation (8) to seismic reflection data, we parameterize the problem such that the model is a series of sound speeds corresponding to layers in the water column whose time thicknesses are held constant at the seismic data sample increment of seconds.

This ensures that any layer that Cited by: Inversion of Seismic reflection Data (10) (most of the off-diagonal terms are null in general). THE INVERSE PROBLEM The solution of the forward problem was written [equation WI: P = f(K P, S) or, using the notations of the preceding section, p = f(m).

(11) The a priori model m, will, of course, not in general predict for Cited by: Recent progress in numerical methods and computer science allows us today to simulate the propagation of seismic waves through realistically heterogeneous Earth models with unprecedented accuracy.

Full waveform tomography is a tomographic technique that takes advantage of numerical solutions of the elastic wave equation. Geophysical Prospecting,63, – doi: / Velocity model building from seismic reflection data by full-waveform inversion Romain Brossier1∗,Stephane Operto´ 2 and Jean Virieux1 1ISTerre, Univ.

de Grenoble Alpes - CNRS, BP 53, Grenoble Ce France, and 2Geoazur, Univ. de Nice Sophia Antipolis - CNRS,´ rue Albert Einstein, Valbonne, France. Dx = m. Because the data used are seismic reflection data recorded with limited source-receiver offsets, we can only obtain a well-constructed image of the topmost portion of the model.

In the following two sections, we will present two schemes to overcome this problem in reflection seismic waveform tomography. Layer-Stripping Scheme. Full waveform inversion of seismic data is a challenging subject partly because of the lack of precise knowledge of the source.

Since currently available approaches involve some form of approximations to the source, inversion results are subject to the quality and the choice of the source information used.

A new full waveform inversionCited by: 2. An overview of full-waveform inversion in exploration geophysics. GEOPHYSICS Article 1 Aug Inversion of seismic reflection data in the acoustic approximation Authors: In-depth conversations in applied geophysics from the Society of Exploration Geophysicists.

With new episodes monthly. Tomographic images and waveform fits Resolution analysis Discussion 14 Application of full waveform tomography to active-source surface-seismic data [written by FLORIAN BLEIBINHAUS] Introduction Data can be found, making iterative waveform inversion the preferred tool to improve our Earth models using most or all of the observed data.

The book in your hands is the first to provide a broad overview on how to solve the forward problem to calculate accurate seismograms in 3. Seismic inversion involves the set of methods which seismologists use to infer properties through physical measurements.

Surface-wave inversion is the method by which elastic properties, density, and thickness of layers in the subsurface are obtained through analysis of surface-wave dispersion.

The entire inversion process requires the gathering of seismic data, the creation of dispersion. Reflection traveltime tomography is an inversion method for estimating the earth model parameters from the reflection traveltimes associated with the observed seismic data.

The reflection traveltime from a source at the surface to a reflection point at the subsurface and back to a receiver at the surface is represented by an integral of the Author: Öz Yilmaz.

Reconstruction of the layer anisotropic elastic parameters and high-resolution fracture characterization from P-wave data: a case study using seismic inversion and Bayesian rock physics parameter estimation.

Geophysical Prospecting, Vol. 57, Issue. 2, p. Cited by:   In seismic waveform tomography, or full-waveform inversion (FWI), one effective strategy used to reduce the computational cost is shot-encoding, Cited by: An impulsive normal traction is applied uniformly over the surface of a perfectly stratified plane layered earth.

The ensuing particle velocity at the surface is assumed to be measured. The problem of calculating the subsurface characteristic impedance from knowledge of the input pulse and the measured data is the one-dimensional inverse problem of reflection problem is set up Cited by: A theory-guided deep-learning formulation and optimization of seismic waveform inversion.

Read More. Technical Article — Seismic Inversion March–April Application of 2D full-waveform inversion on exploration land data. Use of prismatic waves in full-waveform inversion with the exact Hessian. We have studied elastic wave scattering and iterative inversion in the context of the Kirchhoff approximation.

The approach is more consistent with the weak-contrast reflectivityCited by: 1. Seismic 2D Reflection Processing and Interpretation of Shallow Refraction Data ABSTRACT Posiva Oy takes care of the final disposal of spent nuclear fuel in Finland.

In year Olkiluoto was selected for the site of final disposal. Currently construction of the underground research facility, ONKALO, is going on at the Olkiluoto site.

Parametrization of general seismic potency and moment tensors for source inversion of seismic waveform data Lupei Zhu1 and Yehuda Ben-Zion2 1Department of Earth and Atmospheric Sciences, Saint Louis University, St. Louis, MOUSA. E-mail: [email protected] 2Department of Earth Sciences, University of Southern California, Los Angeles, CA ,USAFile Size: KB.

Abstract. A technique for inverting marine seismic interface wave data for shear wave attenuation parameters of ocean sediments is presented. Because of the difficulty in estimating spectral ratios of seismograms in the case when multiple modes are present, a linear perturbation technique that uses the recorded time series seismogram or its envelope as input data is by: 5.

Introduction [2] In this research letter, I propose procedures and methods for estimating seismic Q values directly from a reflection seismic trace. The procedures are akin to the velocity analysis and thus are referred to as the Q analysis. [3] Conventional Q estimation methods directly compare two seismic wavelets, selected at different depth (or time) levels from, for instance, a VSP.

To perform waveform inversion for the Flannan- and W-reflectors, the sharpest, simplest, most iso- lated, low-noise segments of the data from the DRUM and GRID 4 seismic profiles were chosen.

Shot do- main data were used as these are more coherent and consistent than data in the CDP by: 7. s, seismic refraction profiles were collected with regularity both in the United States and worldwide. The history of seismic reflection profiling is much more closely tied to hydrocarbon exploration activities (Sheriff and Geldart, ).

The modern seismic reflection system as we know it today dates from the s when field parties recorded. Full seismic waveform inversion for structural and source parameters Inaugural-Dissertation zur Erlangung des Doktorgrades der Fakultät für Geowissenschaften der Setup of the waveform tomography - data, initial model and resolution analysis Full waveform inversion (FWI) is a powerful method for reconstructing subsurface parameters from local measurements of the seismic wavefield.

This method consists in minimizing the distance between Cited by: AVO principles, processing and inversion CREWES Research Report — Volume 18 () 5 R(θ) R Gsin2 θ = p +. (10) This equation is linear if we plot R as a function ofsin. We will then perform a 2 θ linear regression analysis on the seismic amplitudes to estimate interceptRp, and gradient Size: KB.

The broad band data approaches the response of the reflection coefficients and more accurately represents the acoustic impedance changes in the rock sequence.

However, if the broad band data is to be used, some other means, other than the seismic wiggly trace, must be found to display it in a manner which can be adapted to routine. To demonstrate the usefulness of our seismogram segmentation and waveform selection algorithm in full 3-D waveform tomography, we use a local waveform data set collected in Southern California (Lee et al) as an example.

Our data set is composed of both waveform recordings of local small to medium-sized earthquakes and ambient-noise Green's Cited by: Reflection seismic tomography using only traveltime data may be unable to resolve the ambiguity caused by trade-off between reflector position and velocity anomaly.

The inclusion of amplitude data in the inversion may help to resolve this problem because the amplitudes and traveltimes are sensitive to different features of the.

Oz Yilmaz has expanded his original volume on processing to include inversion and interpretation of seismic data. In addition to the developments in all aspects of conventional processing, this two-volume set represents a comprehensive and complete coverage of the modern trends in the seismic industry-from time to depth, from 3-D to 4-D, from 4-D to 4-C, and from isotropy to anisotropy.Having used RadExPro Professional for diverse near-surface research projects we can say that this software package does a great job.

Having this very ergonomic and reliable package of seismic processing tools available is quite a technical plus point, either at fieldwork with QC–tools or back at the office with the full variety of processing steps.Seismic Creating synthetic seismic data: Convolution • Use the sonic and density logs to compute an impedance ‘log’ • Calculate the reflection coefficients • Convolve our pulse with the seismic reflectivity • Sum the individual wavelets to get the synthetic seismic .