Download or read book Frequency time Analysis of Seismic Reflection Data Using the Wavelet Transform and Related Methods written by Avijit Chakraborty and published by . This book was released on 1996 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Time frequency Analysis of Seismic Signals written by Yanghua Wang and published by John Wiley & Sons. This book was released on 2022-10-11 with total page 245 pages. Available in PDF, EPUB and Kindle. Book excerpt: A practical and insightful discussion of time-frequency analysis methods and technologies Time–frequency analysis of seismic signals aims to reveal the local properties of nonstationary signals. The local properties, such as time-period, frequency, and spectral content, vary with time, and the time of a seismic signal is a proxy of geologic depth. Therefore, the time–frequency spectrum is composed of the frequency spectra that are generated by using the classic Fourier transform at different time positions. Different time–frequency analysis methods are distinguished in the construction of the local kernel prior to using the Fourier transform. Based on the difference in constructing the Fourier transform kernel, this book categorises time–frequency analysis methods into two groups: Gabor transform-type methods and energy density distribution methods. This book systematically presents time–frequency analysis methods, including technologies which have not been previously discussed in print or in which the author has been instrumental in developing. In the presentation of each method, the fundamental theory and mathematical concepts are summarised, with an emphasis on the engineering aspects. This book also provides a practical guide to geophysicists who attempt to generate geophysically meaningful time–frequency spectra, who attempt to process seismic data with time-dependent operations for the fidelity of nonstationary signals, and who attempt to exploit the time–frequency space seismic attributes for quantitative characterisation of hydrocarbon reservoirs.
Download or read book Practical Time Frequency Analysis written by Rene Carmona and published by Academic Press. This book was released on 1998-08-27 with total page 493 pages. Available in PDF, EPUB and Kindle. Book excerpt: Time frequency analysis has been the object of intense research activity in the last decade. This book gives a self-contained account of methods recently introduced to analyze mathematical functions and signals simultaneously in terms of time and frequency variables. The book gives a detailed presentation of the applications of these transforms to signal processing, emphasizing the continuous transforms and their applications to signal analysis problems, including estimation, denoising, detection, and synthesis. To help the reader perform these analyses, Practical Time-Frequency Analysis provides a set of useful tools in the form of a library of S functions, downloadable from the authors' Web sites in the United States and France. Detailed presentation of the Wavelet and Gabor transforms Applications to deterministic and random signal theory Spectral analysis of nonstationary signals and processes Numerous practical examples ranging from speech analysis to underwater acoustics, earthquake engineering, internet traffic, radar signal denoising, medical data interpretation, etc Accompanying software and data sets, freely downloadable from the book's Web page
Download or read book Elements of Seismic Dispersion written by Christopher L. Liner and published by SEG Books. This book was released on 2012 with total page 193 pages. Available in PDF, EPUB and Kindle. Book excerpt: Demonstrates how spectral decomposition and time-frequency methods have led to improved understanding and use of nonlinear harmonics, near-surface guided waves, layer-induced anisotropy, velocity dispersion and attenuation, interference, and Biot reflection. The discussion includes examples, figures, and literature references for further study.
Download or read book Seismic Data Decomposition Using Sparse Dictionary written by Rongchang Liu and published by . This book was released on 2019 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt: Spectrum decomposition methods map 1D seismic trace into 2D plane of time and frequency. The decomposed frequency components of seismic trace are widely used to quantitatively predict the thickness of thin layers. The current popular time-spectrum analysis methods include the Short Time Fourier transform (STFT), Continuous Wavelet Transform (CWT), S-transform (ST), and Matching Pursuit (MP), among which MP is the most tolerant of window/scalar effect. However, the traditional wavelet library is a set of user defined wavelet which does not consider the seismic event interfering of thin layer. As a result, it is very difficult for MP based algorithms to obtain an accurate wavelet in each decomposition iteration for thin layer reservoirs. The improved MP (IMP) algorithm assumes that the seismic reflection response of thin layers can be simulated by the convolution between wavelet and a thin-layer cake model. The parameters of wavelet library of MP algorithm include wavelet type, the dominant frequency of wavelet, and the phase of the wavelet. The parameters of my new “wavelet” library include wavelet type, the dominant frequency of wavelet, the phase of the wavelet, and the time thickness of thin layer model. I applied IMP to three examples to demonstrate the effectiveness of IMP. The first example is a synthetic seismic trace generated using a layer-cake model. The second example is a synthetic seismic trace computed using well logs. The third example is the real seismic data. The first synthetic example indicates that the reflectivity set obtained using IMP accurately points out the interface of thin layers. The second synthetic example indicates that the impedance computed using reflectivity of IMP has higher correlation coefficient when compared to that of MP. The real seismic data example indicates that reflectivity set obtained using IMP can identify the top and base of thin layers whose two-way time thickness are great than T/5, where T is the period corresponding to the dominant frequency of seismic data.
Download or read book Seismic Exploration written by H.N. Al-Sadi and published by Birkhäuser. This book was released on 2013-11-22 with total page 211 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Tau p a plane wave approach to the analysis of seismic data written by P.L Stoffa and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt: In exploration seismology, data are acquired at multiple source and receiver posi tions along a profile line. These data are subsequently processed and interpreted. The primary result of this process is a subsurface image of the exploration target. As part of this procedure, additional information is also obtained about the subsurface material properties, e.g., seismic velocities. The methods that are employed in the acquisition and processing of exploration seismic data are internally consistent. That is, principally near vertical incidence seismic waves are generated, recorded and subsequently imaged. The data processing methods commonly used are based upon a small angle of incidence approximation, thus making the imaging problem tractable for existing data processing technology. Although tremendously successful, the limitations of this method are generally recognized. Current and future exploration goals will likely require the use of additional seismic waves, i.e., both compressional and shear precritical and postcritical reflections and refractions. Also, in addition to making better use of seismic travel times, recent efforts to directly incorporate seismic amplitude variations show that the approach may lead to a better understanding of subsurface rock properties. In response to more demanding exploration goals, recent data acquisition techniques have improved significantly by increasing the spatial aperture and incorporating a large number of closely spaced receivers. The need for better subsurface resolution in depth and position has encouraged the use of 240, 512, and even 1024 recorded data channels with receiver separations of 5 to 25 m.
Download or read book Digital Imaging and Deconvolution written by Enders A. Robinson and published by SEG Books. This book was released on 2008 with total page 449 pages. Available in PDF, EPUB and Kindle. Book excerpt: Covering ideas and methods while concentrating on fundamentals, this book includes wave motion; digital imaging; digital filtering; visualization aspects of the seismic reflection method; sampling theory; the frequency spectrum; synthetic seismograms; wavelet processing; deconvolution; seismic attributes; phase rotation; and seismic attenuation.
Download or read book Geophysical Signal Analysis written by Enders A. Robinson and published by SEG Books. This book was released on 2000 with total page 481 pages. Available in PDF, EPUB and Kindle. Book excerpt: Addresses the construction, analysis, and interpretation of mathematical and statistical models. The practical use of the concepts and techniques developed is illustrated by numerous applications. The chosen examples will interest many readers, including those engaged in digital signal analysis in disciplines other than geophysics.
Download or read book Aspects of Seismic Reflection Data Processing written by R. Marschall and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 309 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Time frequency Localization with Wavelet Transform and It s Application in Seismic Data Analysis written by Satish Kumar Sinha and published by . This book was released on 2002 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Practical Time frequency Analysis written by René Carmona and published by . This book was released on 1998 with total page 490 pages. Available in PDF, EPUB and Kindle. Book excerpt: Time frequency analysis has been the object of intense research activity in the last decade. This book gives a self-contained account of methods recently introduced to analyze mathematical functions and signals simultaneously in terms of time and frequency variables. The book gives a detailed presentation of the applications of these transforms to signal processing, emphasizing the continuous transforms and their applications to signal analysis problems, including estimation, denoising, detection, and synthesis. To help the reader perform these analyses, Practical Time-Frequency Analysis provides a set of useful tools in the form of a library of S functions, downloadable from the authors' Web sites in the United States and France. Key Features * Detailed presentation of the Wavelet and Gabor transforms * Applications to deterministic and random signal theory * Spectral analysis of nonstationary signals and processes * Numerous practical examples ranging from speech analysis to underwater acoustics, earthquake engineering, internet traffic, radar signal denoising, medical data interpretation, etc * Accompanying software and data sets, freely downloadable from the book's Web page
Download or read book 52 Things You Should Know about Geophysics written by Matt Hall and published by Agile Libre. This book was released on 2012 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Constrained Least squares Spectral Analysis written by Charles Ian Cecil Puryear and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation describes a new method called Constrained Least-Squares Spectral Analysis (CLSSA), an inversion-based algorithm for computing the time-frequency analysis of reflection seismograms. CLSSA is formulated and applied to modeled seismic waveforms and real seismic data. The Fourier Series coefficients are computed as a function of time directly by inverting a basis of truncated sinusoidal kernels for a moving time window. The method results in spectra that have reduced window smearing for a given window length relative to the Discrete Fourier Transform irrespective of window shape, and a time-frequency analysis with a combination of time and frequency resolution that is superior to both the Short-time Fourier Transform and the Continuous Wavelet Transform. The reduction in spectral smoothing enables better determination of the spectral characteristics of interfering reflections within a short window. The degree of resolution improvement relative to the Short-time Fourier Transform increases as window length decreases. As compared to the Continuous Wavelet Transform, the method has greatly improved temporal resolution, particularly at low frequencies.
Download or read book Seismic Data Analysis written by Özdoğan Yilmaz and published by SEG Books. This book was released on 2001 with total page 2065 pages. Available in PDF, EPUB and Kindle. Book excerpt: Expanding the author's original work on processing to include inversion and interpretation, and including developments in all aspects of conventional processing, this two-volume set is a comprehensive and complete coverage of the modern trends in the seismic industry - from time to depth, from 3D to 4D, from 4D to 4C, and from isotropy to anisotropy.
Download or read book Numerical Methods of Exploration Seismology written by Gary F. Margrave and published by Cambridge University Press. This book was released on 2019-01-10 with total page 457 pages. Available in PDF, EPUB and Kindle. Book excerpt: Technical guide to the theory and practice of seismic data processing with MATLAB algorithms for advanced students, researchers and professionals.
Download or read book Multicomponent Seismic Technology written by Bob Adrian Hardage and published by . This book was released on 2011 with total page 318 pages. Available in PDF, EPUB and Kindle. Book excerpt:
