Assessment of Seabed Seismic Systems
Author | : Elizabeth T. Bunce |
Publisher | : |
Total Pages | : 32 |
Release | : 1980 |
Genre | : Sedimentation and deposition |
ISBN | : |
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Author | : Elizabeth T. Bunce |
Publisher | : |
Total Pages | : 32 |
Release | : 1980 |
Genre | : Sedimentation and deposition |
ISBN | : |
Author | : |
Publisher | : |
Total Pages | : 892 |
Release | : 1994 |
Genre | : Aeronautics |
ISBN | : |
Author | : John A. Orcutt |
Publisher | : |
Total Pages | : 66 |
Release | : 1985 |
Genre | : |
ISBN | : |
The results of the first year's data analysis employing data collected during the NGENDEI seismic experiment in the southwest Pacific are presented. This experiment tested the DARPA Marine Seismic System and verified the improved signal-to-noise ratio achieved by burying the instrument within the oceanic crust. The experiment, which took place on the Deep Sea Drilling Project Leg 91, was designed to test the Marine Seismic System (MSS) in a realistic environment near an active trench environment. An earlier test of the system in the northwest Pacific had been unsuccessful because of difficulties in drilling an acceptable borehole in the seafloor. The MSS was recorded aboard the D/V Glomar Challenger for several days of earthquake, refraction and environmental noise experiments. The subsequent deployment of an autonomous recording package on the seafloor was successful.
Author | : Global Marine Development Inc |
Publisher | : |
Total Pages | : 142 |
Release | : 1984 |
Genre | : Drilling platforms |
ISBN | : |
Author | : Masaki Kanao |
Publisher | : BoD – Books on Demand |
Total Pages | : 121 |
Release | : 2019-11-20 |
Genre | : Science |
ISBN | : 1789853273 |
The importance of seismic wave research lies not only in our ability to understand and predict earthquakes and tsunamis, but it also reveals information on the Earth's composition and features in much the same way as it led to the discovery of Mohorovicic's discontinuity. As our theoretical understanding of the physics behind seismic waves has grown, physical and numerical modeling have greatly advanced and now augment applied seismology for better prediction and engineering practices. This book demonstrates the latest techniques and advances in seismic wave analysis from a theoretical approach, data acquisition and interpretation, to analyses and numerical simulations, as well as research applications. The major topics in this book cover aspects on seismic wave propagation, characteristics of their velocities and attenuation, deformation process of the Earth's medium, seismic source process and tectonic dynamics with relating observations, as well as propagation modeling of seismic waves.
Author | : |
Publisher | : |
Total Pages | : 536 |
Release | : 1990 |
Genre | : Power resources |
ISBN | : |
Author | : Laura Ann Brown |
Publisher | : |
Total Pages | : |
Release | : 2004 |
Genre | : |
ISBN | : |
The number of subsea production systems placed in deepwater locations in the Gulf of Mexico (GOM) has increased significantly in the last ten to fifteen years. Currently, API-RP2A (2000 a, b) designates the GOM as a low seismic zone, and thus does not require seismic effects to be considered during the design process. However, there have been a number of seismic events with Richter magnitudes between 3.0 and 4.9 that have occurred in this region. As a result, questions have been raised regarding the seismic performance of deepwater subsea systems. This thesis presents an analytical parametric study where a prototype subsea structure was selected based on a survey of subsea systems. The baseline analytical model consisted of a single casing embedded in soft clay soils, which supported a lumped mass at a cantilevered height above the soil. A number of the model characteristics were varied in the parametric study to simulate the structural response of a range of subsea structures. This thesis discusses the impact of API-RP2A Zone 1 and 2 design seismic demands for the performance of subsea structures. The results from the subsequent analyses show that the stresses and deflections produced by the Zone 1 and 2 peak ground accelerations fall within the allowable limits.
Author | : Hua-Wei Zhou |
Publisher | : Cambridge University Press |
Total Pages | : 509 |
Release | : 2014-01-23 |
Genre | : Nature |
ISBN | : 0521199107 |
Modern introduction to seismic data processing demonstrating exploration and global geophysics applications through real data and tutorial examples that can be demonstrated with the instructor's software of choice. The underlying physics and mathematics of analysis methods is presented, showing students the limitations and potential for creating models of the sub-surface.
Author | : Mundy Obilor Jim |
Publisher | : JimArts |
Total Pages | : 86 |
Release | : 2014-12-16 |
Genre | : Science |
ISBN | : 8299890675 |
This book dwells on the fundamentals of seabed seismic in terms of data acquisition, QC and pre-processing. The focus is on receivers placed on the seabed— hydrophones to measure pressure in water (p-waves), geophones or accelerometers to measure vertical particle motion (p-waves) and horizontal particle motion (s-waves). The discussion is mainly on four components (4C) which more or less covers other multi-component seismic techniques. The first three chapters end with a set of exercises that will be of tremendous help within the educational environment. Chapter 1 defines seabed seismic and presents its advantages over conventional marine seismic methods. Experiences or implementation of the technique in some oil fields are given. In chapter 2, some basic signal properties are given, including the PS converted wave process and the derivation of the common conversion point (CCP) approximation formula. Basic data acquisition techniques are treated, including topics like sensor orientation, CCP binning and shear wave splitting. P-wave to S-wave velocity ratio (Gamma) is explained. The basics of QC and processing of seabed seismic data are treated in Chapter 3 where two model processing work-flows are showcased to explain the requisite data processing keys. The improvements in seabed seismic have not been without difficulties. Some of these challenges are treated in Chapter 4.
Author | : |
Publisher | : |
Total Pages | : 960 |
Release | : 1980 |
Genre | : Biology |
ISBN | : |
This Summary of Abstracts contains all abstracts submitted for publication during calendar year 1979 by the staff and students of the Woods Hole Oceanographic Institution.