Rock Quality Seismic Velocity Attenuation And Anisotropy PDF Download
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Author | : Nick Barton |
Publisher | : CRC Press |
Total Pages | : 729 |
Release | : 2006-11-03 |
Genre | : Technology & Engineering |
ISBN | : 1134160135 |
Download Rock Quality, Seismic Velocity, Attenuation and Anisotropy Book in PDF, ePub and Kindle
Seismic measurements take many forms, and appear to have a universal role in the Earth Sciences. They are the means for most easily and economically interpreting what lies beneath the visible surface. There are huge economic rewards and losses to be made when interpreting the shallow crust or subsurface more, or less accurately, as the case may be.
Author | : Nick Barton |
Publisher | : CRC Press |
Total Pages | : 756 |
Release | : 2006-11-03 |
Genre | : Technology & Engineering |
ISBN | : 0203964454 |
Download Rock Quality, Seismic Velocity, Attenuation and Anisotropy Book in PDF, ePub and Kindle
Seismic measurements take many forms, and appear to have a universal role in the Earth Sciences. They are the means for most easily and economically interpreting what lies beneath the visible surface. There are huge economic rewards and losses to be made when interpreting the shallow crust or subsurface more, or less accurately, as the case may be.
Author | : V. Babuska |
Publisher | : Springer Science & Business Media |
Total Pages | : 232 |
Release | : 2012-12-06 |
Genre | : Science |
ISBN | : 9401136009 |
Download Seismic Anisotropy in the Earth Book in PDF, ePub and Kindle
Author | : Christopher Juhlin |
Publisher | : |
Total Pages | : 170 |
Release | : 1990 |
Genre | : Crystalline rocks |
ISBN | : |
Download Seismic Attenuation, Shear Wave Anisotropy and Some Aspects of Fracturing in the Crystalline Rock of the Siljan Ring Area, Central Sweden Book in PDF, ePub and Kindle
Author | : Bruce H. Dubendorff |
Publisher | : |
Total Pages | : 204 |
Release | : 1987 |
Genre | : Seismic waves |
ISBN | : |
Download Changes in Seismic Velocity and Apparent Attenuation Due to Isotropic and Anisotropic Scattering Book in PDF, ePub and Kindle
Much work is presently being done concerning small scale heterogeneities in the earth's crust. These heterogeneities range from pores in sedimentary rocks up to fluctuations in the density and seismic constants of the earth's crust with scale lengths of kilometers. The ability to study and quantify these heterogeneities using seismic methods would be a major advance in the earth sciences. Physical modeling has been shown to be a useful technique for investigating various aspects of wave propagation. In this thesis, two physical modeling experiments (one three-dimensional and one two-dimensional) are used to investigate the scattering of seismic waves from small scale heterogeneities and the changes in seismic velocity and apparent attenuation resulting from this scattering. The effects of both isotropic and anisotropic scattering on velocity and apparent attenuation are calculated. These experimental results are compared to theoretical results. The theory used for isotropic scattering for the three-dimensional experiment is a modified version of Wu's single scattering theory, where instead of calculating the scattering for a single scatterer using the Born approximation, the exact results for scattering from a cylindrical shape are used. While the results for compressional waves and both components of shear waves compare reasonably well for small scatterer volume fractions, at larger scatterer volume fractions, where the need for multiple scattering is more likely, the results for all waves do not compare as well. Many theories used to test anisotropic scattering predict changes in velocity rather than changes in apparent attenuation. The velocity changes are used primarily in this work due to geometrical focusing by a seismic lens that biases the amplitudes (and hence the estimates of apparent attenuation) at low frequencies where most theories predict apparent attenuation. Velocities are calculated from the data using travel times and low frequency phase shifts for the compressional waves and for one component of the shear waves measured in this two-dimensional experiment. Theories that are used to predict compressional and shear wave velocities for both isotropic and anisotropic scatterers are based on a fractional volume method (isotropic), two crack methods (isotropic and anisotropic), and a finely layered method (anisotropic). The isotropic experimental results have much larger, non-linear changes in the velocities than do the isotropic theoretical results. The anisotropic experimental results have similar shapes to both theoretical anisotropic methods for compressional waves and to the theoretical anisotropic crack method for shear waves. Attenuation is computed using log spectral ratios and compares as well with the theoretical results as can be expected within the limits set. A method using anisotropic apparent attenuation to help quantify the scatterers is developed for use with field data.
Author | : Erling Fjaer |
Publisher | : |
Total Pages | : 778 |
Release | : 1996 |
Genre | : Nature |
ISBN | : |
Download Seismic Anisotropy Book in PDF, ePub and Kindle
Author | : Leon Thomsen |
Publisher | : SEG Books |
Total Pages | : 248 |
Release | : 2002 |
Genre | : Nature |
ISBN | : 1560801123 |
Download Understanding Seismic Anisotropy in Exploration and Exploitation Book in PDF, ePub and Kindle
All rock masses are seismically anisotropic, but we generally ignore this in our seismic acquisition, processing, and interpretation. The anisotropy nonetheless does affect our data, in ways that limit the effectiveness with which we can use it, as long as we ignore it. This book, produced for use with the fifth SEG/EAGE Distinguished Instructor Short Course, helps us understand why this inconsistency between reality and practice has been so successful in the past and why it will be less successful in the future as we acquire better seismic data (especially including vector seismic data) and correspondingly higher expectations of it. This book helps us understand how we can modify our practice to more fully realize the potential inherent in our data through algorithms which recognize the fact of seismic anisotropy.
Author | : Ilya Tsvankin |
Publisher | : SEG Books |
Total Pages | : 470 |
Release | : 2012 |
Genre | : Nature |
ISBN | : 1560802995 |
Download Seismic Signatures and Analysis of Reflection Data in Anisotropic Media Book in PDF, ePub and Kindle
Provides essential background on anisotropic wave propagation, introduces efficient notation for transversely isotropic (TI) and orthorhombic media, and identifies the key anisotropy parameters for imaging and amplitude analysis. Particular attention is given to moveout analysis and P-wave time-domain processing for VTI and TTI.
Author | : Hezhu Yin |
Publisher | : |
Total Pages | : 454 |
Release | : 1992 |
Genre | : Attenuation (Physics) |
ISBN | : |
Download Acoustic Velocity and Attenuation of Rocks Book in PDF, ePub and Kindle
Author | : Matt Hall |
Publisher | : Agile Libre |
Total Pages | : 134 |
Release | : 2012 |
Genre | : Science |
ISBN | : 0987959409 |
Download 52 Things You Should Know about Geophysics Book in PDF, ePub and Kindle
There is something for every subsurface professional in these fifty-two short essays by more than three dozen petroleum geoscientists. The roster includes some of the most prolific geophysicists of our time, as well as some recently qualified scientists. The topics are even more diverse, ranging from anisotropic media to pre-stack interpretation, and from stories of early seismic workstations to career advice for the future.