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A Review of Tangent-phase Interferometry Method and ApplicationsNormal access

Authors: F. Poletto, B. Farina and G. Böhm
Event name: 77th EAGE Conference and Exhibition - Workshops
Session: WS15 - Imaging, Characterization and Monitoring Using Interferometric Methods - Recent Developments
Publication date: 01 June 2015
DOI: 10.3997/2214-4609.201413578
Organisations: EAGE
Language: English
Info: Extended abstract, PDF ( 2.21Mb )
Price: € 20

Summary:
Seismic interferometry makes it possible to reconstruct redatumed signals creating virtual sources at receivers. The conventional method utilizes the crosscorrelation of recorded signals from a plurality of sources to estimate the Green’s function between receivers. Great advantages are to remove the propagation effects outside the representation zone, and redatum signals without the need of velocity model. The seismic interferometry method requires an appropriate and complete distribution of seismic sources around the receivers for signal representation with stationary conditions. Lack of coverage may results in ghost and artefacts. However, the condition to have only partial coverage by sources is common. Recently, a method was proposed to overcome these limitations and to extend the stationary conditions for selected events. The tangent-phase interferometry (TPI) corrects the phase in the cross-correlations before integral representation. This approach requires identification of the signal trends for selected events in the cross correlations, and corresponds to move the virtual source from receiver positions to projected points on the signal wavefronts. We present a review of TPI applications, with the analysis of emerging aspects in different examples. This review is aimed at evaluating advantages and critical issues in the joint use of TPI with other inversion and imaging methods.


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