Development of a High-resolution Shallow Seismic Reflection System PDF Download
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Author: Ja'afar W. Ali
Publisher:
ISBN:
Category : Seismic reflection method
Languages : en
Pages :
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Author: Ja'afar W. Ali
Publisher:
ISBN:
Category : Seismic reflection method
Languages : en
Pages :
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Author: Michael Ladd Shoemaker
Publisher:
ISBN:
Category :
Languages : en
Pages : 69
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Author:
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 204
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Author: Maren Scheidhauer
Publisher:
ISBN:
Category :
Languages : en
Pages : 257
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Author: Myung W. Lee
Publisher:
ISBN:
Category : Seismic reflection method
Languages : en
Pages : 30
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Author: Kenneth W. King
Publisher:
ISBN:
Category : Seismic reflection method
Languages : en
Pages : 68
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 13
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This integrated test plan describes the demonstration of a surface high resolution seismic reflection acquisition system using swept source technology. Compressional wave data will be collected along a previously occupied seismic line associated with a recent seismic survey north of the 300 Area. The swept source system will be employed testing two very different high resolution vibrator sources, one with a frequency range from 10 to 500 Hz and a smaller unit with a range from 20 to 1,500 Hz. This will enable a precursory comparison of two vibrator data sets with standard impulse data. The data will be evaluated for the presence of reflected energy, signal strength, frequency content and signal-to-noise ratio. If the water table can be distinguished from the Hanford/Ringold formation contact, then the high permeability Hanford-filled channels can be mapped. Next, if details on the configuration of the Ringold middle mud can be discerned, this will allow detecting fluid pathway through the mud and confirm the depositional nature of this unit. Finally, by mapping the extent of the lower confining mud unit, areas where the polluted unconfined and lower confined aquifers communicate might be located. Another source and acquisition method will also be tested by gathering data along the same seismic line. This system uses a lightweight source that produces a high-velocity shock wave that strikes the earth's surface causing an acoustic wave to propagate downward. The acquisition method is nonconventional and is reported to eliminate obstructing noise such as groundroll and air blast. It is unexpected that this system will have the imaging ability of the vibratory systems. However it could prove to be economical for shallow applications when only compressional energy is needed.
Author:
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ISBN: 9789995463946
Category :
Languages : en
Pages :
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Author: Jan Brouwer
Publisher: Pergamon
ISBN:
Category : Science
Languages : en
Pages : 412
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Book Description
The book covers all aspects of acquisition, processing and interpretation of shallow reflection seismic data for geotechnical and environmental purposes. Chapter 1 provides a thorough exposition of (i) the mathematical foundations of digital seismics, (ii) the physics of wave propagation in solids, (iii) the mathematical tools for the analysis of wave fields. This theoretical part is based extensively on first principles, thus the book can be used as a stand-alone reference to all aspects of shallow reflection seismics. Chapter 2 describes the field instruments, including the physical principles underlying them and their modern implementation, and the acquisition techniques that allow to obtain the best data under the given technical and operational constraints. Chapters 3-5 describe the processing required to maintain the resolution of seismic data without sacrificing other attributes of the data. The discussion is particularly thorough in where the required techniques go beyond the standard processing steps known from exploration seismics. Chapters 6-10 describe the use of portable vibrators in geotechnical surveying, that was pioneered by the authors and their colleagues. The first four of these chapters, that describe the special techniques required and some of the opportunities offered by the use of these tools, are based on experience with the portable P-vibrator, while chapter 10 was added after the recent introduction of the portable S-vibrator to shallow surveying. All five chapters are accompanied by data from actual surveys. The book closes with six case histories from different settings in Western Europe based on impact sources weight drop and explosives.
Author: C. Melvin Lepper
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 48
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