Abstract
Converted seismic waves (specifically, downgoing P-waves that convert
on reflection to upcoming S-waves) are increasingly being used to
explore for subsurface targets. Rapid advancements in both land and
marine multicomponent acquisition and processing techniques have
led to numerous applications for P-S surveys. Uses that have arisen
include structural imaging (e.g., "seeing" through gas-bearing sediments,
improved fault definition, enhanced near-surface resolution), lithologic
estimation (e.g., sand versus shale content, porosity), anisotropy
analysis (e.g., fracture density and orientation), subsurface fluid
description, and reservoir monitoring. Further applications of P-S
data and analysis of other more complicated converted modes are developing.
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