Print this pageAAPG GEO 2010 Middle East
Geoscience Conference & Exhibition
Innovative Geoscience Solutions – Meeting Hydrocarbon Demand in Changing Times
March 7-10, 2010 – Manama, Bahrain
Imaging Conditions for Time-Reverse Modeling
(1) Spectraseis, Zurich, Switzerland.
Active 
seismic
processing is concerned with two-way travel times, down and up, through the subsurface. In contrast, passive seismic methods are predicated on 3+ travel paths in the case of interferometry, and one-way travel path wave fields in the case of source location. Secondary sources and diffractions maintain the same kinematics as primary sources and can also be imaged in the context of source location. We present the chain of time-reverse modeling, image space wave-field decomposition, and various imaging conditions as a migration-like algorithm to locate subsurface sources in passive data and diffractors in active data. The presented imaging conditions respond differently to source mechanism radiation patterns which interpreted in combination provide more information than simply location. Passive
data examples are developed with surface acquisition geometry.