Interferometric/daylight seismic imaging

Autor:	Jian Ming Sheng, Jianhua Yu, James Rickett, Gerard T. Schuster
Rok vydání:	2004
Předmět:	Synthetic seismogram Geophysical imaging Seismic migration Seismic interferometry Dispersive body waves Geodesy Physics::Geophysics Geophysics Wavelet Geochemistry and Petrology Passive seismic Vertical seismic profile Seismology Geology
Zdroj:	Geophysical Journal International. 157:838-852
ISSN:	1365-246X 0956-540X
DOI:	10.1111/j.1365-246x.2004.02251.x
Popis:	SUMMARY Claerbout’s daylight imaging concept is generalized to a theory of interferometric seismic imaging (II). Interferometric seismic imaging is defined to be any algorithm that inverts correlated seismic data for the reflectivity or source distribution. As examples, we show that II can image reflectivity distributions by migrating ghost reflections in passive seismic data and generalizes the receiver-function imaging method used by seismologists. Interferometric seismic imaging can also migrate free-surface multiples in common depth point (CDP) data and image source distributions from passive seismic data. Both synthetic and field data examples are used to illustrate the different possibilities of II. The key advantage of II is that it can image source locations or reflectivity distributions from passive seismic data where the source position or wavelet is unknown. In some cases it can mitigate defocusing errors as a result of statics or an incorrect migration velocity. The main drawback with II is that severe migration artefacts can be created by partial focusing of virtual multiples.
Databáze:	OpenAIRE
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