Relevant bibliographies by topics / Seismic wave attenuation

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  2. Dissertations / Theses
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  4. Book chapters
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Academic literature on the topic 'Seismic wave attenuation'

Author: Grafiati
Published: 4 June 2021
Last updated: 18 February 2022

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Journal articles on the topic "Seismic wave attenuation"

1

Spencer, James W., and Jacob Shine. "Seismic wave attenuation and modulus dispersion in sandstones." GEOPHYSICS 81, no. 3 (May 2016): D211—D231. http://dx.doi.org/10.1190/geo2015-0342.1.

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We have conducted laboratory experiments over the 1–200 Hz band to examine the effects of viscosity and permeability on modulus dispersion and attenuation in sandstones and also to examine the effects of partial gas or oil saturation on velocities and attenuations. Our results have indicated that bulk modulus values with low-viscosity fluids are close to the values predicted using Gassmann’s first equation, but, with increasing frequency and viscosity, the bulk and shear moduli progressively deviate from the values predicted by Gassmann’s equations. The shear moduli increase up to 1 GPa (or approximately 10%) with high-viscosity fluids. The P- and S-wave attenuations ([Formula: see text] and [Formula: see text]) and modulus dispersion with different fluids are indicative of stress relaxations that to the first order are scaling with frequency times viscosity. By fitting Cole-Cole distributions to the scaled modulus and attenuation data, we have found that there are similar P-wave, shear and bulk relaxations, and attenuation peaks in each of the five sandstones studied. The modulus defects range from 11% to 15% in Berea sandstone to 16% to 26% in the other sandstones, but these would be reduced at higher confining pressures. The relaxations shift to lower frequencies as the viscosity increased, but they do not show the dependence on permeability predicted by mesoscopic wave-induced fluid flow (WIFF) theories. Results from other experiments having patchy saturation with liquid [Formula: see text] and high-modulus fluids are consistent with mesoscopic WIFF theories. We have concluded that the modulus dispersion and attenuations ([Formula: see text] and [Formula: see text]) in saturated sandstones are caused by a pore-scale, local-flow mechanism operating near grain contacts.
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Chen, Huaizhen. "Estimating elastic properties and attenuation factor from different frequency components of observed seismic data." Geophysical Journal International 220, no. 2 (October 21, 2019): 794–805. http://dx.doi.org/10.1093/gji/ggz476.

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SUMMARY Based on an attenuation model, we first express frequency-dependent P- and S-wave attenuation factors as a function of P-wave maximum attenuation factor, and then we re-express P- and S-wave velocities in anelastic media and derive frequency-dependent stiffness parameters in terms of P-wave maximum attenuation factor. Using the derived stiffness parameters, we propose frequency-dependent reflection coefficient in terms of P- and S-wave moduli at critical frequency and P-wave maximum attenuation factor for the case of an interface separating two attenuating media. Based on the derived reflection coefficient, we establish an approach to utilize different frequency components of observed seismic data to estimate elastic properties (P- and S-wave moduli and density) and attenuation factor, and following a Bayesian framework, we construct the objective function and an iterative method is employed to solve the inversion problem. Tests on synthetic data confirm that the proposed approach makes a stable and robust estimation of unknown parameters in the case of seismic data containing a moderate noise/error. Applying the proposed approach to a real data set illustrates that a reliable attenuation factor is obtained from observed seismic data, and the ability of distinguishing oil-bearing reservoirs is improved combining the estimated elastic properties and P-wave attenuation factor.
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Sun, Junzhe, Sergey Fomel, Tieyuan Zhu, and Jingwei Hu. "Q-compensated least-squares reverse time migration using low-rank one-step wave extrapolation." GEOPHYSICS 81, no. 4 (July 2016): S271—S279. http://dx.doi.org/10.1190/geo2015-0520.1.

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Attenuation of seismic waves needs to be taken into account to improve the accuracy of seismic imaging. In viscoacoustic media, reverse time migration (RTM) can be performed with [Formula: see text]-compensation, which is also known as [Formula: see text]-RTM. Least-squares RTM (LSRTM) has also been shown to be able to compensate for attenuation through linearized inversion. However, seismic attenuation may significantly slow down the convergence rate of the least-squares iterative inversion process without proper preconditioning. We have found that incorporating attenuation compensation into LSRTM can improve the speed of convergence in attenuating media, obtaining high-quality images within the first few iterations. Based on the low-rank one-step seismic modeling operator in viscoacoustic media, we have derived its adjoint operator using nonstationary filtering theory. The proposed forward and adjoint operators can be efficiently applied to propagate viscoacoustic waves and to implement attenuation compensation. Recognizing that, in viscoacoustic media, the wave-equation Hessian may become ill-conditioned, we propose to precondition LSRTM with [Formula: see text]-compensated RTM. Numerical examples showed that the preconditioned [Formula: see text]-LSRTM method has a significantly faster convergence rate than LSRTM and thus is preferable for practical applications.
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Dobrynina, A. A., P. A. Predein, V. A. Sankov, Ts A. Tubanov, D. P. D. Sanzhieva, and E. A. Gorbunova. "SPATIAL VARIATIONS OF SEISMIC WAVE ATTENUATION IN THE SOUTH BAIKAL BASIN AND ADJACENT AREAS (BAIKAL RIFT)." Geodynamics & Tectonophysics 10, no. 1 (March 23, 2019): 147–66. http://dx.doi.org/10.5800/gt-2019-10-1-0408.

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Our detailed study of the crust and upper mantle of the South Baikal basin focused on seismic coda and seismic S-waves attenuation and estimated seismic quality factor (QS and QC), frequency parameter (n), attenuation coefficient (δ), total attenuation (QT), and the ratio of two components the total attenuation: intrinsic attenuation (Qi), and attenuation due to scattering caused by the inhomogeneities of the medium (QSC). We calculated the sizes of inhomogeneities revealed in the block medium, which put their effect on the attenuation of seismic waves in different frequency ranges. The seismic wave attenuation field was analyzed in comparison with the geological and geophysical characteristics of the medium, and a direct relationship was established between attenuation, composition and active processes in the crust and upper mantle of the studied area. According to the estimated intrinsic attenuation (Qi) and scattering attenuation (QSC) contributions into the total attenuation, intrinsic attenuation is generally dominant in the studied area, while the QSC component increases in the areas of large active faults.
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Hao, Qi, and Tariq Alkhalifah. "An acoustic eikonal equation for attenuating transversely isotropic media with a vertical symmetry axis." GEOPHYSICS 82, no. 1 (January 1, 2017): C9—C20. http://dx.doi.org/10.1190/geo2016-0160.1.

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Seismic-wave attenuation is an important component of describing wave propagation. Certain regions, such as gas clouds inside the earth, exert highly localized attenuation. In fact, the anisotropic nature of the earth induces anisotropic attenuation because the quasi P-wave dispersion effect should be profound along the symmetry direction. We have developed a 2D acoustic eikonal equation governing the complex-valued traveltime of quasi P-waves in attenuating, transversely isotropic media with a vertical-symmetry axis (VTI). This equation is derived under the assumption that the complex-valued traveltime of quasi P-waves in attenuating VTI media are independent of the S-wave velocity parameter [Formula: see text] in Thomsen’s notation and the S-wave attenuation coefficient [Formula: see text] in Zhu and Tsvankin’s notation. We combine perturbation theory and Shanks transform to develop practical approximations to the acoustic attenuating eikonal equation, capable of admitting an analytical description of the attenuation in homogeneous media. For a horizontal-attenuating VTI layer, we also derive the nonhyperbolic approximations for the real and imaginary parts of the complex-valued reflection traveltime. These equations reveal that (1) the quasi SV-wave velocity and the corresponding quasi SV-wave attenuation coefficient given as part of Thomsen-type notation barely affect the ray velocity and ray attenuation of quasi P-waves in attenuating VTI media; (2) combining the perturbation method and Shanks transform provides an accurate analytic eikonal solution for homogeneous attenuating VTI media; (3) for a horizontal attenuating VTI layer with weak attenuation, the real part of the complex-valued reflection traveltime may still be described by the existing nonhyperbolic approximations developed for nonattenuating VTI media, and the imaginary part of the complex-valued reflection traveltime still has the shape of nonhyperbolic curves. In addition, we have evaluated the possible extension of the proposed eikonal equation to realistic attenuating media, an alternative perturbation solution to the proposed eikonal equation, and the feasibility of applying the proposed nonhyperbolic equation for the imaginary part of the complex-valued traveltime to invert for interval attenuation parameters.
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LI, Q., F. SANTOSA, B. WHEELOCK, and K. GOVIL. "Modelling viscoelastic wave phenomenon by homogenisation of the poroelasticity equations." European Journal of Applied Mathematics 32, no. 5 (January 18, 2021): 846–64. http://dx.doi.org/10.1017/s0956792520000467.

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Poroelastic effects have been of great interest in the seismic literature as they have been identified as a major cause of wave attenuation in heterogeneous porous media. The observed attenuation in the seismic wave can be explained in part by energy loss to fluid motion in the pores. On the other hand, it is known that the attenuation is particularly pronounced in stratified structures where the scale of spatial heterogeneity is much smaller than the seismic wavelength. Understanding of poroelastic effects on seismic wave attenuation in heterogeneous porous media has largely relied on numerical experiments. In this work, we present a homogenisation technique to obtain an upscaled viscoelastic model that captures seismic wave attenuation when the sub-seismic scale heterogeneity is periodic. The upscaled viscoelastic model directly relates seismic wave attenuation to the material properties of the heterogeneous structure. We verify our upscaled viscoelastic model against a full poroelastic model in numerical experiments. Our homogenisation technique suggests a new approach for solving coupled equations of motion.
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Hu, Shi Li, Jian Yong Yang, and Guan Shi Wang. "Attenuation Law of Blasting Seismic Wave Amplitude with Time and Calculation of Equivalent Elastic Modulus." Applied Mechanics and Materials 94-96 (September 2011): 178–85. http://dx.doi.org/10.4028/www.scientific.net/amm.94-96.178.

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Abstract. The characteristic frequency was generated when blasting seismic wave propagate in rock mass. The characteristic frequency played an important role in the amplitude attenuation of seismic wave with time and propagation distance. Rock mass was simplified as visco-elastic media. The time attenuation model of seismic wave amplitude was studied by wave equation and the complex number theory. Theoretical analysis demonstrates that attenuation coefficient of seismic wave amplitude with time is mainly affected by rock viscosity coefficient and elastic modulus. The attenuation coefficient decreases with increase of elastic modulus. The attenuation coefficient increases with increase of viscosity coefficient. The test method of equivalent elastic modulus of rock mass was analyzed according to model of time attenuation of seismic wave amplitude in situ. The wave velocity test verified effectiveness of the method. A new method of determining rock mass mechanical parameter was put forward.
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Khosrovani, Hooshang, and Jose Ortega. "Seismic wave attenuation coefficient for soils." Journal of the Acoustical Society of America 108, no. 5 (November 2000): 2529. http://dx.doi.org/10.1121/1.4743358.

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Carter, Andrew J., Veronica A. Torres Caceres, Kenneth Duffaut, and Alexey Stovas. "Velocity-attenuation model from check-shot drift trends in North Sea well data." GEOPHYSICS 85, no. 2 (February 25, 2020): D65—D74. http://dx.doi.org/10.1190/geo2019-0419.1.

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Seismic attenuation distorts phase and narrows bandwidth in seismic surveys. It is also an exploration attribute, as, for example, gas or overpressure, may create attenuation anomalies. Compensating attenuation in imaging requires accurate models. Detailed attenuation models may be obtained using full-waveform inversion (FWI) or attenuation tomography, but their accuracy benefits from reliable starting models and/or constraints. Seismic attenuation and velocity dispersion are necessarily linked for causal linear wave propagation such that higher frequencies travel faster than lower frequencies in an attenuative medium. In publicly released well data from the Norwegian North Sea, we have observed systematic positive linear trends in check-shot drift when comparing (lower frequency) time-depth curves with (higher frequency) integrated sonic transit times. We observe velocity dispersion consistent with layers having constant seismic attenuation. Adapting a previously published method, and assuming an attenuation-dispersion relationship, we use drift gradients, measured over thick stratigraphic units, to estimate interval P-wave attenuation and tentatively interpret its variation in terms of porosity and fluid mobility. Reflectivity modeling predicts a very low attenuation contribution from peg-leg multiples. We use the attenuation values to develop a simple regional relationship between P-wave velocity and attenuation. Observed low drift gradients in some shallower units lead to an arch-shaped model that predicts low attenuation at both low and high velocities. The attenuation estimates were broadly comparable with published effective attenuation values obtained independently nearby. This general methodology for quickly deriving a regional velocity-attenuation relationship could be used anywhere that coincident velocity models are available at seismic and sonic frequencies. Such relationships can be used for fast derivation (from velocities) of starting attenuation models for FWI or tomography, constraining or linking velocity and attenuation in inversion, deriving models for attenuation compensation in time processing, or deriving background trends in screening for attenuation anomalies in exploration.
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Rozhko, Alexander Y. "On the spectral changes of seismic wave energy by a partially saturated crack due to the hysteresis of liquid bridges phenomenon." GEOPHYSICS 86, no. 3 (April 8, 2021): MR133—MR147. http://dx.doi.org/10.1190/geo2020-0685.1.

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Low-frequency shadows are frequently interpreted as attenuation phenomena due to partial saturation with free gas. However, several researchers have argued that shadows are not necessarily a simple attenuation phenomenon because low-frequency energy must have been added or amplified by some physical or numerical process. Attenuation alone should attenuate higher frequencies, not boost lower frequencies. The physical or numerical effects explaining this phenomenon are still debatable in the literature. To better understand the elastic wave energy’s spectral changes in partially saturated rock, we have considered the hysteresis of liquid bridges phenomena inside the crack. We determine that liquid bridges’ hysteresis leads to the nonlinear energy exchange between frequencies, explaining the wave energy boost at lower frequencies. We find that the energy exchange between different frequencies depends on the wave amplitude and the seismic wave spectrum. The low-frequency energy boost is stronger for a continuous spectrum of seismic waves, smaller for the discrete spectrum, and zero for the monochromatic spectrum of seismic waves. In addition, we find that at seismic frequencies, the attenuation 1/ Q-factor due to the friction of the contact line can be much larger than the attenuation due to viscous fluid flow inside the partially saturated crack. Our model depends on the wave amplitude and weakly depends on the wave frequency. The suggested model can help interpret the low-frequency shadows, bright spots, and attenuation anomalies frequently observed around hydrocarbon fields.
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Dissertations / Theses on the topic "Seismic wave attenuation"

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Marks, Samantha Georgina. "Seismic wave attenuation from vertical seismic profiles." Thesis, University of Reading, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.384872.

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Huo, Shoudong. "Wave-equation based seismic multiple attenuation." Thesis, Imperial College London, 2009. http://hdl.handle.net/10044/1/6143.

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Reflection seismology is widely used to map the subsurface geological structure of the Earth. Seismic multiples can contaminate seismic data and are therefore due to be removed. For seismic multiple attenuation, wave-equation based methods are proved to be effective in most cases, which involve two aspects: multiple prediction and multiple subtraction. Targets of both aspects are to develop and apply a fully datadriven algorithm for multiple prediction, and a robust technique for multiple subtraction. Based on many schemes developed by others regarding to the targets, this thesis addresses and tackles the problems of wave-equation based seismic multiple attenuation by several approaches. First, the issue of multiple attenuation in land seismic data is discussed. Multiple Prediction through Inversion (MPTI) method is expanded to be applied in the poststack domain and in the CMP domain to handle the land data with low S/N ratio, irregular geometry and missing traces. A running smooth filter and an adaptive threshold K-NN (nearest neighbours) filter are proposed to help to employ MPTI on land data in the shot domain. Secondly, the result of multiple attenuation depends much upon the effectiveness of the adaptive subtraction. The expanded multi-channel matching (EMCM) filter is proved to be effective. In this thesis, several strategies are discussed to improve the result of EMCM. Among them, to model and subtract the multiples according to their orders is proved to be practical in enhancing the effect of EMCM, and a masking filter is adopted to preserve the energy of primaries. Moreover, an iterative application of EMCM is proposed to give the optimized result. Thirdly, with the limitation of current 3D seismic acquisition geometries, the sampling in the crossline direction is sparse. This seriously affects the application of the 3D multiple attenuation. To tackle the problem, a new approach which applies a trajectory stacking Radon transform along with the energy spectrum is proposed in this thesis. It can replace the time-consuming time-domain sparse inversion with similar effectiveness and much higher efficiency. Parallel computing is discussed in the thesis so as to enhance the efficiency of the strategies. The Message-Passing Interface (MPI) environment is implemented in most of the algorithms mentioned above and greatly improves the efficiency.
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Raji, Wasiu. "Seismic and petro-physical studies on seismic wave attenuation." Thesis, University of Liverpool, 2012. http://livrepository.liverpool.ac.uk/7617/.

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Anelasticity and inhomogeneity in the Earth decreases the energy and modifies the frequency of seismic waves as they travel through the Earth. This phenomenon is known as seismic attenuation. The associated physical process leads to amplitude diminution, waveform distortion and phase delay. The level of attenuation a wave experiences depends on the degree of anelasticity and the scale of inhomgeneity in the rocks it passes through. Therefore, attenuation is sensitive to the presence of fluids, degree of saturation, porosity, fault, pressure, and the mineral content of the rocks. The work presented in this thesis covers attenuation measurements in seismic data; estimation of P- and S-wave attenuation in recorded well logs; attenuation analysis for pore fluid determination; and attenuation compensation in seismic data. Where applicable, a set of 3D seismic data or well logs recorded in the Gullfaks field, North Sea, Norway, is used to test the methods developed in the thesis. A new method for determining attenuation in reflection seismic data is presented. The inversion process comprises two key stages: computation of centroid frequency for the seismic signal corresponding to the top and base of the layer being investigated, using variable window length and fast Fourier transform; and estimation of the difference in centroid frequency and traveltime for the paired seismic signals. The use of a shape factor in the mathematical model allows several wavelet shapes to be used to represent a real seismic signal. When applied to synthetic data, results show that the method can provide reliable estimates of attenuation using any of the wavelet shapes commonly assumed for a real seismic signal. Tested against two published methods of quality factor (Q) measurement, the new method shows less sensitivity to interference from noise and change of frequency bandwidth. The method is also applied to seismic data recorded in the Gullfaks field. The trace length is divided into four intervals: AB, BC, CD, and DE. The mean attenuation (1/Q_m) calculated in intervals AB, BC, CD, and DE are 0.0196, 0.0573, 0.0389, and 0.0220, respectively. Results of attenuation measurements using the new method and the classical spectral ratio method (Bath 1974, Spencer et al, 1982) are in close agreement, and they show that interval BC and AB have the highest and lowest value of attenuation, respectively. One of the applications of Q measured in seismic records is its usage for attenuation compensation. To compensate for the effects of attenuation in recorded seismograms, I propose a Q-compensation algorithm using a recursive inverse Q-filtering scheme. The time varying inverse Q-filter has a Fourier integral representation in which the directions of the up-going and down-going waves are reversed. To overcome the instability problem of conventional inverse Q-filters, wave numbers are replaced with slownesses, and the compensation scheme is applied in a layer-by-layer recursive manner. When tested with synthetic and field seismograms, results show that the algorithm is appropriate for correcting energy dissipation and waveform distortion caused by attenuation. In comparison with the original seismograms, the Q-compensated seismograms show higher frequencies and amplitudes, and better resolved images of subsurface reflectors. Compressional and shear wave inverse quality factors (Q_P^(-1) and Q_S^(-1)) are estimated in the rocks penetrated by well A-10 of the Gullfaks field. The results indicate that the P-wave inverse quality factor is generally higher in hydrocarbon-saturated rocks than in brine-saturated rocks, but the S-wave inverse quality factor does not show a dependence on fluid content. The range of the ratio of Q_P^(-1) to Q_S^(-1) measured in gas, water and oil-saturated sands are 0.56 – 0.78, 0.39 – 0.55, and 0.35 – 0.41, respectively. A cross analysis of the ratio of P-wave to S-wave inverse quality factors, (Q_P^(-1))/(Q_S^(-1) ), with the ratio of P-wave to S-wave velocities, V_P/V_S , clearly distinguishes gas sand from water sand, and water sand from oil sand. Gas sand is characterised by the highest (Q_P^(-1))/(Q_S^(-1) ) and the lowest V_P/V_S ; oil sand is characterised by the lowest (Q_P^(-1))/(Q_S^(-1) ) and the highest V_P/V_S ; and water sand is characterized by the V_P/V_S and (Q_P^(-1))/(Q_S^(-1) ) values between those of the gas and oil sands. The signatures of the bulk modulus, Lame’s first parameter, and the compressional modulus (a hybrid of bulk and shear modulus) show sensitivities to both the pore fluid and rock mineral matrix. These moduli provided a preliminary identification for rock intervals saturated with different fluids. Finally, the possibility of using attenuation measured in seismic data to monitor saturation in hydrocarbon reservoirs is studied using synthetic time-lapse seismograms, and a theoretical rock physics forward modelling approach. The theory of modulus-frequency-dispersion is applied to compute a theoretical curve that describes the dynamic effects of saturation on attenuation. The attenuation measured in synthetic time-lapse seismograms is input to the theoretical curve to invert the saturation that gave rise to the attenuation. Findings from the study show that attenuation measured in recorded seismograms can be used to monitor reservoir saturation, if a relationship between seismogram-derived attenuation and saturation is known. The study also shows that attenuation depends on other material properties of rocks. For the case studied, at a saturation of 0.7, a 10% reduction in porosity caused a 5.9% rise in attenuation, while a 10% reduction in the bulk modulus of the saturating fluids caused an 11% reduction in attenuation.
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Liu, Faqi. "Surface multiple attenuation operators in the plane wave domain : theory and applications /." Digital version accessible at:, 1999. http://wwwlib.umi.com/cr/utexas/main.

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Tao, Guo. "Acoustic wave velocities, attenuation and transport properties of some sandstones." Thesis, Imperial College London, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.319154.

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Boadu, Fred Kofi. "Fractal characterization of fractures : effect of fractures on seismic wave velocity and attenuation." Diss., Georgia Institute of Technology, 1994. http://hdl.handle.net/1853/27272.

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Carpi, Isotta. "Seismic Metamaterials for Rayleigh waves attenuation: analytical and numerical survey on the effect of soil stratification." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2016.

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Locally resonant materials and periodic media have been recently proposed as a mean to control and redirect elastic waves at different length scale. In particular, at geophysical scale, large resonant/periodic structures have been used as an innovative solution to attenuate the propagation of seismic waves. Previous studies have shown the possibility of attenuating surface ground motions by deflecting seismic Rayleigh waves into soil bulk. This surface to bulk wave conversion has been proved in the case of homogenous soil. Here we investigate how the surface to bulk wave conversion is influenced by inhomogeneous depth dependent soil properties. Analytical and numerical evaluation have been developed in time and frequency domain to determine the efficiency of soil-resonators interaction in inhomogeneous layered media to be used as comparison with experimental results obtained from an experimental setup built at ETH. Furthermore, results from the inhomogeneous case have been compared with the homogenous soil case, to exploit effectiveness and limitation of wave conversion phenomenon. It has been shown that the soil with depth dependent profile strongly influence wave motion. In fact, no effective wave conversion is present in this case, due to stiffer properties of the soil with depth that force the wave to reconvert its direction to the surface.
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Ruan, Youyi. "Surface wave propagation in 3-D anelastic media." Diss., Virginia Tech, 2012. http://hdl.handle.net/10919/28945.

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Lateral perturbations in anelasticity (Q) and wave speed together provide important constraints on thermal and chemical structures in the mantle. In present-day tomography studies of global wave speed and anelasticity, the significance of 3-D wave speed and 3-D Q structures on surface wave travel times and amplitudes has not been well understood. In this dissertation, the effects of lateral perturbations in anelasticity (Q) and wave speed on surface wave observables are quantified based upon wave propagation simulations in 3-D earth models using a Spectral Element Method. Comparison between phase delays caused by 3-D wave speed structures and those caused by 3-D Q variations show that anelastic dispersion due to lateral perturbation in Q is important in long-period surface wave and can account for 15-20% observed phase delays. For amplitude perturbations, elastic focusing/defocusing effects associated with 3-D wave speed structures are dominant while energy dissipation is important in short-period (â ¼ 50 s) surface waves but decreases quickly with increasing wave period. Anelastic focusing/defocusing associated with 3-D anelastic dispersion becomes more important than wave attenuation in longer period surface waves. In tomography studies, ray theory breaks down and finite frequency effects become important when the length scale of heterogenities are smaller than seismic wavelength. Finite frequency effects in 3-D earth models are investigated by comparing theoretical predictions of travel times and amplitudes with â ground truthâ measurements made on synthetic seismograms generated in SEM simulations. The comparisons show that finite frequency effects are stronger in amplitudes than in phases, especially at long periods.
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Zaccherini, Rachele. "Surface waves attenuation in granular media through a small-scale Metabarrier." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2017.

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The present thesis describes a small-scale experiment, carried out in the laboratory of the Swiss Federal Institute of Technology of Zurich (ETH). The research focuses on metamaterials, locally resonant structures able to affect the propagation of waves passing through them. The present thesis investigates an innovative method to attenuate Rayleigh waves through the insertion of a barrier of scaled resonators into the soil, capable of generating a bandgap in the dispersion relation. Waves, whose frequency fall within the bandgap, cannot propagate through the resonant structure. Each resonator is constituted by a steel mass mounted on top of a spring made with 16 beams forming a truss. Taking advantage of the results of A. Palermo et al [1] as a starting point, we carried out a small-scale experiment in a big wooden box filled with glass beads in order to investigate the effectiveness of the designed metabarrier in attenuating surface waves generated by a metal rod exciting the surface every 300 ms. We found a stop-band in the dispersion relation inside the metabarrier, generated by the coupling between the vertical component of Rayleigh waves and the longitudinal resonances of the resonators. In parallel with the laboratory experiment, some numerical simulations have been performed with the software Comsol Multiphysics in order to compare the results obtained experimentally.
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Waszek, Lauren Esme. "A body wave study of the seismic velocity and attenuation structures of Earth's inner core." Thesis, University of Cambridge, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.610770.

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Books on the topic "Seismic wave attenuation"

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Carroll, R. D. Measurement of seismic P- and S-wave attenuation in volcanic tuff, Rainier Mesa Tunnels, Nevada Test Site. [Denver, CO]: U.S. Geological Survey, 1994.

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Juhlin, Christopher. Seismic attenuation, shear wave anisotropy and some aspects of fracturing in the crystalline rock of the Siljan Ring Area, Central Sweden. Uppsala: Academia Upsaliensis, 1990.

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Wu, Ru-Shan, and Keiiti Aki, eds. Scattering and Attenuation of Seismic Waves, Part II. Basel: Birkhäuser Basel, 1989. http://dx.doi.org/10.1007/978-3-0348-6363-6.

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Aki, Keiiti, and Ru-Shan Wu, eds. Scattering and Attenuations of Seismic Waves, Part I. Basel: Birkhäuser Basel, 1988. http://dx.doi.org/10.1007/978-3-0348-7722-0.

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Doherty, John T. The attenuation of seismic waves in real and simulated geology. Dublin: University College Dublin, 1998.

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Rouleau, Pierre Michel. On seismic wave attenuation in an hydrated crust. 1994.

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1930-, Aki Keiiti, and Wu Ru-Shan 1938-, eds. Scattering and attenuations of seismic waves. Basel: Birkhäuser Verlag, 1988.

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Deere, Jeffrey James. Scattering and attenuation of crosshole seismic waves. 1988.

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Scattering and Attenuation of Seismic Waves/Part Two. Birkhauser, 1989.

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Scattering and Attenuation of Seismic Waves/Part Three. Birkhauser, 1990.

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Book chapters on the topic "Seismic wave attenuation"

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Sato, Haruo, and Michael C. Fehler. "Attenuation of High-Frequency Seismic Waves." In Seismic Wave Propagation and Scattering in the Heterogeneous Earth, 109–48. New York, NY: Springer New York, 1998. http://dx.doi.org/10.1007/978-1-4612-2202-6_5.

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Sato, Haruo, and Michael C. Fehler. "Attenuation of High-Frequency Seismic Waves." In Seismic Wave Propagation and Scattering in the Heterogeneous Earth, 109–48. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-540-89623-4_5.

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Jackson, Ian. "The laboratory study of seismic wave attenuation." In Mineral and Rock Deformation: Laboratory Studies, 11–23. Washington, D. C.: American Geophysical Union, 1986. http://dx.doi.org/10.1029/gm036p0011.

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Sato, Haruo, Michael C. Fehler, and Takuto Maeda. "Attenuation of High-Frequency Seismic Waves." In Seismic Wave Propagation and Scattering in the Heterogeneous Earth : Second Edition, 153–84. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-23029-5_5.

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Berryman, James G. "Seismic Wave Attenuation in Fluid-Saturated Porous Media." In Scattering and Attenuations of Seismic Waves, Part I, 423–32. Basel: Birkhäuser Basel, 1988. http://dx.doi.org/10.1007/978-3-0348-7722-0_21.

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Wu, Ru-Shan. "The Perturbation Method in Elastic Wave Scattering." In Scattering and Attenuation of Seismic Waves, Part II, 605–37. Basel: Birkhäuser Basel, 1989. http://dx.doi.org/10.1007/978-3-0348-6363-6_3.

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Rose, James H. "Elastic Wave Inverse Scattering in Nondestructive Evaluation." In Scattering and Attenuation of Seismic Waves, Part II, 715–39. Basel: Birkhäuser Basel, 1989. http://dx.doi.org/10.1007/978-3-0348-6363-6_7.

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Frankel, Arthur. "A Review of Numerical Experiments on Seismic Wave Scattering." In Scattering and Attenuation of Seismic Waves, Part II, 639–85. Basel: Birkhäuser Basel, 1989. http://dx.doi.org/10.1007/978-3-0348-6363-6_4.

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Fang, Y., and G. Müller. "Attenuation Operators and Complex Wave Velocities for Scattering in Random Media." In Seismic Waves in Laterally Inhomogeneous Media, 269–85. Basel: Birkhäuser Basel, 1996. http://dx.doi.org/10.1007/978-3-0348-9213-1_12.

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Cooper, Reid F. "9. Seismic Wave Attenuation: Energy Dissipation in Viscoelastic Crystalline Solids." In Plastic Deformation of Minerals and Rocks, edited by Shun-ichiro Karato and Hans-Rudolph Wenk, 253–90. Berlin, Boston: De Gruyter, 2002. http://dx.doi.org/10.1515/9781501509285-013.

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Conference papers on the topic "Seismic wave attenuation"

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Shen, Y., B. Biondi, R. Clapp, and D. Nichols. "Wave-equation Migration Q Analysis (WEMQA)." In EAGE Workshop on Seismic Attenuation. Netherlands: EAGE Publications BV, 2013. http://dx.doi.org/10.3997/2214-4609.20131850.

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Rubino, J. G., T. M. Müller, L. Guarracino, and K. Holliger. "Seismic P-wave Attenuation in Fractured Rocks." In EAGE Workshop on Seismic Attenuation. Netherlands: EAGE Publications BV, 2013. http://dx.doi.org/10.3997/2214-4609.20131835.

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Mueller, T. M. "Poroelasticity Theory and Wave Attenuation in Porous Rocks." In EAGE Workshop on Seismic Attenuation. Netherlands: EAGE Publications BV, 2013. http://dx.doi.org/10.3997/2214-4609.20131831.

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Clark, R. A., S. Osborne, and J. Cooper. "In Situ Acoustic Wave Attenuation Measurements of Ocean Water." In EAGE Workshop on Seismic Attenuation. Netherlands: EAGE Publications BV, 2013. http://dx.doi.org/10.3997/2214-4609.20131859.

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Bouchaala, F., M. Y. Ali, and A. Farid. "Determination of Seismic Wave Attenuation Profile in Carbonate Rocks." In EAGE Workshop on Seismic Attenuation. Netherlands: EAGE Publications BV, 2013. http://dx.doi.org/10.3997/2214-4609.20131862.

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Kato, A., S. Onozuka, and F. Kono. "Measurement of P-wave Attenuation of Heavy Oil for Viscoelastic Modeling." In EAGE Workshop on Seismic Attenuation. Netherlands: EAGE Publications BV, 2013. http://dx.doi.org/10.3997/2214-4609.20131846.

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Dvorkin, Jack, Gary Mavko, and Joel Walls. "Seismic wave attenuation at full water saturation." In SEG Technical Program Expanded Abstracts 2003. Society of Exploration Geophysicists, 2003. http://dx.doi.org/10.1190/1.1817630.

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Brajanovski, M., T. M. Mueller, and B. Gurevich. "Characterization of Fractured Reservoirs Using Seismic Wave Attenuation." In 69th EAGE Conference and Exhibition incorporating SPE EUROPEC 2007. European Association of Geoscientists & Engineers, 2007. http://dx.doi.org/10.3997/2214-4609.201401947.

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Jones, Terry D. "Frequency-dependent seismic attenuation: Effect on wave propagation." In 1985 SEG Technical Program Expanded Abstracts. SEG, 1985. http://dx.doi.org/10.1190/1.1892641.

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Mashinskii, E. I., and D. A. Mednykh. "Relaxation Spectra of Wave Attenuation in Single-crystal Quartz and Sandstone." In EAGE/SEG Research Workshop - Frequency Attenuation and Resolution of Seismic Data 2009. European Association of Geoscientists & Engineers, 2009. http://dx.doi.org/10.3997/2214-4609.20147494.

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Reports on the topic "Seismic wave attenuation"

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Day, Steven M., J. B. Minster, and Heming Xu. Numerical Modeling of Linear and Nonlinear Seismic Wave Attenuation. Fort Belvoir, VA: Defense Technical Information Center, April 1998. http://dx.doi.org/10.21236/ada380369.

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Price, R. H., R. J. III Martin, and R. W. Haupt. The effect of frequency on Young`s modulus and seismic wave attenuation. Office of Scientific and Technical Information (OSTI), July 1994. http://dx.doi.org/10.2172/145360.

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Walls, Joel, Richard Uden, Scott Singleton, Rone Shu, and Gary Mavko. P- and S-wave seismic attenuation for deep natural gas exploration and development. Office of Scientific and Technical Information (OSTI), April 2005. http://dx.doi.org/10.2172/934923.

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Walls, Joel, M. Taner, Richard Uden, Scott Singleton, Naum Derzhi, Gary Mavko, and Jack Dvorkin. Novel Use of P- and S-Wave Seismic Attenuation for Deep Natural Gas Exploration and Development. Office of Scientific and Technical Information (OSTI), September 2007. http://dx.doi.org/10.2172/915819.

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Taylor, Oliver-Denzil, Amy Cunningham,, Robert Walker, Mihan McKenna, Kathryn Martin, and Pamela Kinnebrew. The behaviour of near-surface soils through ultrasonic near-surface inundation testing. Engineer Research and Development Center (U.S.), September 2021. http://dx.doi.org/10.21079/11681/41826.

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Abstract:
Seismometers installed within the upper metre of the subsurface can experience significant variability in signal propagation and attenuation properties of observed arrivals due to meteorological events. For example, during rain events, both the time and frequency representations of observed seismic waveforms can be significantly altered, complicating potential automatic signal processing efforts. Historically, a lack of laboratory equipment to explicitly investigate the effects of active inundation on seismic wave properties in the near surface prevented recreation of the observed phenomena in a controlled environment. Presented herein is a new flow chamber designed specifically for near-surface seismic wave/fluid flow interaction phenomenology research, the ultrasonic near-surface inundation testing device and new vp-saturation and vs-saturation relationships due to the effects of matric suction on the soil fabric.
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Nuttli, Otto W., Brian J. Mitchell, and H. J. Hwang. Attenuation of Seismic Waves at Regional Distances. Fort Belvoir, VA: Defense Technical Information Center, August 1985. http://dx.doi.org/10.21236/ada164617.

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