Seismic Reflection Imaging In Crystalline Terrains Microform
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Seismic Reflection Imaging In Crystalline Terrains Microform
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Author : Mladen R. Nedimovic
language : en
Publisher: National Library of Canada = Bibliothèque nationale du Canada
Release Date : 2000
Seismic Reflection Imaging In Crystalline Terrains Microform written by Mladen R. Nedimovic and has been published by National Library of Canada = Bibliothèque nationale du Canada this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000 with categories.
Seismic Reflection Imaging In Crystalline Terrains
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Author : Mladen R. Nedimovic
language : en
Publisher:
Release Date : 2000
Seismic Reflection Imaging In Crystalline Terrains written by Mladen R. Nedimovic and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000 with categories.
Seismic refection surveying is a well proven geophysical method for delineating in detail the deep structure of sedimentary basins. Recently, it has also been applied in igneous and metamorphic (crystalline) rock environments. For cost and access reasons most of the data collected in crystalline terrains has been acquired by 2D crooked line profiling. But where the survey geometry is significantly irregular and the geologic structures have cross-profile dip, standard 2D imaging procedures severely underperform. My research has focused on finding remedies for the above problems by exploring and developing processing methods which usefully exploit the 3D character of crooked line data, or by finding methods of imaging that are more tolerant to the errors. To these ends I have designed the following data manipulation processes: (1) '3D prestack migration of 2D crooked lane data'. Despite obvious data limitations, bands of reflectivity recorded in crooked line data are preserved and positioned to their true subsurface locations. (2) ' Optimum cross dip analysis'/'stack'. This algorithm first analyzes cross-profile dip of the imaged reflectors and then collapses recorded bands of reflectivity into single events. (3) 'Amplitude stack'. This is a simple procedure used as a measure of last resort when 1 and 2 fail to yield 3D structural information. From tests on synthetic data and two field data sets from the Archean Superior Province, I have found that: (1) When 2D crooked line geometry forms a 3D swath of data wider than a significant fraction of the Fresnel Zone radius at the depth of interest. 3D prestack migration will focus events in space well enough for interpretation. The process is, however, computationally cumbersome; (2) Although the cross dip stack does not output a 3D volume like prestack migration, and it retains only the stronger of overlapping reflective responses, it does provide most of the same interpretative information; (3) Amplitude stacks are surprisingly effective in imaging general structural trends. In general, it is often possible to recover the 3D geometry of the structure imaged by a 2D crooked line survey.
Reflection Seismic Imaging Of The Upper Crystalline Crust For Characterization Of Potential Repository Sites
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Author : Christopher Juhlin
language : en
Publisher:
Release Date : 2001
Reflection Seismic Imaging Of The Upper Crystalline Crust For Characterization Of Potential Repository Sites written by Christopher Juhlin and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001 with Radioactive waste disposal in the ground categories.
Illustrated Seismic Processing
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Author : Stephen J. Hill
language : en
Publisher: SEG Books
Release Date : 2019
Illustrated Seismic Processing written by Stephen J. Hill and has been published by SEG Books this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019 with Science categories.
Provides a foundation for understanding the fascinating field of seismic processing. Written for the non-expert, this two-volume introductory text reveals the limitations and potential pitfalls of seismic data, prepares both seismic interpreters and acquisition specialists for working with seismic processing geophysicists, and much more.
Seismic Reflection Imaging Of The Chapleau Block Kapuskasing Structural Zone Ontario
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Author : Wayne T. Geis
language : en
Publisher:
Release Date : 1989
Seismic Reflection Imaging Of The Chapleau Block Kapuskasing Structural Zone Ontario written by Wayne T. Geis and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1989 with Folds (Geology) categories.
Seismic True Amplitude Imaging
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Author : Jörg Schleicher
language : en
Publisher: SEG Books
Release Date : 2007
Seismic True Amplitude Imaging written by Jörg Schleicher and has been published by SEG Books this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with Science categories.
Providing a pictorial presentation of the basic principles of Kirchhoff-type imaging and proceeding to a comprehensive treatment of its kinematic and dynamic aspects, this book is a valuable addition for anyone interested in the theory and practices of seismic data processing for imaging and parameter estimation with all its attendant processes.
Seismic Reflection Imaging Problems Resulting From A Rough Surface At The Top Of The Accretionary Prism At Convergent Margins
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Author : Donald George Coltrin
language : en
Publisher:
Release Date : 1987
Seismic Reflection Imaging Problems Resulting From A Rough Surface At The Top Of The Accretionary Prism At Convergent Margins written by Donald George Coltrin and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1987 with Continental margins categories.
Application Of Seismic Interferometry To Imaging A Crystalline Rock Environment At An Active Vms Mine In Flin Flon Manitoba Canada
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Author : Eric Alexander Roots
language : en
Publisher:
Release Date : 2016
Application Of Seismic Interferometry To Imaging A Crystalline Rock Environment At An Active Vms Mine In Flin Flon Manitoba Canada written by Eric Alexander Roots and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with categories.
Seismic interferometry is a technique by which the Green's function or impulse response between two receivers is recovered through the cross-correlation of the transmission responses recorded by those receivers. This technique has found several applications, including the generation of virtual shot gathers from ambient seismic noise for use in seismic reflection processing. In March of 2013, 336 receivers were deployed over the volcanogenic massive sulphide (VMS) deposit found at the Lalor mine in Manitoba, Canada. Approximately 300 hours of ambient seismic noise was recorded for the purpose of testing the effectiveness of seismic interferometry in imaging a crystalline rock environment. A time-domain beamforming algorithm was implemented to determine the locations of the sources present during recording. The results indicate that the vast majority of the recorded noise originated from mine and ventilation shafts located at the Lalor mine. Synthetic experiments were conducted to determine the effects such a source distribution would have on the application of seismic interferometry in the presence of dipping reflectors. The experiments show that if sources are located only on one side of a receiver line, the dip and lateral extents of reflectors will not be imaged properly. A technique involving beamforming and F-K filtering was developed to remove surface wave noise originating from near-field sources. Using this technique, the raw data was processed into virtual shot gathers free of surface wave noise. Virtual shot gathers were generated along 4 of the receiver lines and processed as separate 2-D reflection datasets. The resulting reflection profiles are compared against coincident DMO-stacked data from a larger 3-D active seismic survey conducted over the Lalor mine. Using this comparison in conjunction with knowledge of the local geology, events recovered in the passive reflection profiles are interpreted as either real reflections or spurious events, and possible explanations of their origin are given.
Processing Shallow High Resolution Seismic Reflection Data In A Crystalline Rock Environment
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Author : Stanley Jude Radzevicius
language : en
Publisher:
Release Date : 1995
Processing Shallow High Resolution Seismic Reflection Data In A Crystalline Rock Environment written by Stanley Jude Radzevicius and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with categories.
Seismic Processing And Imaging With Diffractions
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Author : Sergius Dell
language : en
Publisher: Sudwestdeutscher Verlag Fur Hochschulschriften AG
Release Date : 2012
Seismic Processing And Imaging With Diffractions written by Sergius Dell and has been published by Sudwestdeutscher Verlag Fur Hochschulschriften AG this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with categories.
Reflected and diffracted waves have different nature and role in the applied seismics. Diffractions itself can be classified in both real seismic and hypothetical diffractions. The real seismic diffractions are seismic waves which are scattered on small heterogeneities in the subsurface or diffracted at the edges and tips, and recorded as the diffracted part of the whole wavefield. To image objects beyond the classical Rayleigh limit, it is indispensable to use real seismic diffractions.The hypothetical diffractions are mathematical constructions resulting from Huygens principle which helps to correctly image reflected events. These Huygens diffractions build a kernel of seismic reflection imaging, particularly, Kirchhoff migration. The migrated data represent pure reflected data with a higher resolution. Considering either real or Huygens diffractions allows to adjust seismic tools for particular needs depending on the interpreter's goal and the geological interpretation. The book is intended for all who want to have a look at non-conventional seismic methods.