Benefits, Liabilities, and Examples of Interferometric Seismic Imaging
نویسندگان
چکیده
Seismic interferometry is a new field in seismology that is finding many useful applications in exploration geophysics (Rickett and Claerbout, 1999; Schuster, 2001; Yu and Schuster, 2006; Wapenaar et al., 2002; Wapenaar, 2004; Wapenaar et al., 2005; Calvert et al., 2004 and others) Analogous to optical interferometry, seismic interferometry estimates the detailed properties of an elastic medium by analyzing the interference patterns of seismic waves. The interference patterns are constructed by correlation and summation of seismic traces to robustly image the earth’s elastic properties. In this paper we discuss some key benefits and liabilities of seismic interferometry applied to both CDP and VSP data. Both synthetic and field data examples are used to illustrate some key benefits: wider subsurface illumination, better spatial resolution, source statics elimination, data interpolation, and redatuming of receivers and/or sources to be closer to the target. The chief drawback of seismic interferometry is the coherent artifacts associated with unphysical events in the correlograms, known as either virtual multiples or crosstalk.
منابع مشابه
Interferometric Seismic Imaging
Claerbout’s daylight imaging concept is generalized to the general theory of interferometric seismic imaging (II). Interferometric seismic imaging is defined to be any algorithm that inverts crosscorrelated seismic data for the reflectivity or source distribution. As examples, we show that II can be used to image reflectivity distributions by migrating ghost reflections in passive seismic data,...
متن کاملTheory of Daylight/Interferometric Imaging: Tutorial
I present the theory of interferometric imaging (II). Interferometric imaging is any algorithm that images crosscorrelated data for the reflectivity or source distribution. As examples, I show that II can image arbitrary reflectivity distributions by migrating ghost reflections in passive seismic data, generalize the receiver-function imaging method used by seismologists, and migrate free-surfa...
متن کاملAttenuation of spatial aliasing in CMP domain by non-linear interpolation of seismic data along local slopes
Spatial aliasing is an unwanted side effect that produces artifacts during seismic data processing, imaging and interpolation. It is often caused by insufficient spatial sampling of seismic data and often happens in CMP (Common Mid-Point) gather. To tackle this artifact, several techniques have been developed in time-space domain as well as frequency domain such as frequency-wavenumber, frequen...
متن کاملPoint-spread functions for interferometric imaging
Interferometric redatuming is a data-driven method to transform seismic responses with sources at one level and receivers at a deeper level into virtual reflection data with both sources and receivers at the deeper level. Although this method has traditionally been applied by cross-correlation, accurate redatuming through a heterogeneous overburden requires solving a multidimensional deconvolut...
متن کاملImaging internal multiples from subsalt VSP data — Examples of target-oriented interferometry
Seismic interferometry has become a technology of growing interest for imaging borehole seismic data. We demonstrate that interferometry of internal multiples can be used to image targets above a borehole receiver array. By internal multiples, we refer to all types of waves that scatter multiple times inside the model. These include, for instance, interbed, intrasalt, and water-bottom multiples...
متن کامل