REFLECTION OF SEISMIC WAVES FROM ATTENUATING AND ANISOTROPIC OCEAN BOTTOM SEDIMENTS A - Printable Version +- Civil Engineering Association (https://forum.civilea.com) +-- Forum: eBooks (https://forum.civilea.com/forum-63.html) +--- Forum: General Books (https://forum.civilea.com/forum-54.html) +---- Forum: Civil Engineering MSc and PhD thesis (https://forum.civilea.com/forum-124.html) +---- Thread: REFLECTION OF SEISMIC WAVES FROM ATTENUATING AND ANISOTROPIC OCEAN BOTTOM SEDIMENTS A (/thread-44494.html) |
REFLECTION OF SEISMIC WAVES FROM ATTENUATING AND ANISOTROPIC OCEAN BOTTOM SEDIMENTS A - TAFATNEB - 09-01-2013 REFLECTION OF SEISMIC WAVES FROM ATTENUATING AND ANISOTROPIC OCEAN BOTTOM SEDIMENTS Author: ROLF SIDLER | Size: 9.4 MB | Format: PDF | Quality: Unspecified | Year: 2008 | pages: 95
There is an increasing trend towards recording marine seismic data directly on the seafloor. This acquisition strategy is mainly motivated by the possibility to simultaneously measure the three components of particle motion in addition to the pressure in the water column immediately above the seabed. Such four-component (4C) seismic recordings thus allow for the recording of S-waves in marine environments and offer the prospect of decomposing the wavefield into its up- and down-going P- and S-wave constituents. The assumptions for acquisition and processing of 4C data is today based on the ocean bottom model as a welded acoustic-elastic contact at the seabed with a homogeneous acoustic layer overlying a homogeneous elastic half-space. This may not hold in wide areas of the oceans where the seafloor typically consists of soft, water-saturated sediments characterized by having strong to very strong seismic attenuation. Moreover, cyclically changing sedimentation processes lead to layering in the sediments, thus introducing macroscopic seismic anisotropy, and overburden pressure and associated compaction effects are likely to result in a strong velocity gradients. Code: *************************************** RE: REFLECTION OF SEISMIC WAVES - andersen3 - 11-29-2013 direct link Code: *************************************** |