Towards improved seismic methods for investigating the offshore shallow subsurface
From inversion and imaging methods to acquisition hardware development
C.G.M. Chapeland (TU Delft - Applied Geophysics and Petrophysics)
D.J. Verschuur – Promotor (TU Delft - Applied Geophysics and Petrophysics)
D.S. Draganov – Promotor (TU Delft - Applied Geophysics and Petrophysics)
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Abstract
In this thesis, we focus on two areas relevant to improving near-surface offshore seismic surveys : inversion-based estimation of subsurface properties and the monitoring of the acquisition-geometry. These issues remain challenging in ultra-high-resolution (UHR) marine geophysics, where imaging the first tens of meters below the seafloor can be limited by both data quality and instrument uncertainties. Through a combination of modelling- and field-data studies and experimental hardware development, we investigate the possibilities for enhancing the characterization of this shallow region which is of interest for the development and monitoring of offshore infrastructure and subsurface resources extraction....