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Diffraction Imaging Via Depth-Oriented Seismic Decomposition: High-Definition Characterization of Fracture FieldsNormal access

Authors: E. Landa, K. Smirnov and C.M. Paleari
Event name: Third EAGE Workshop on Naturally Fractured Reservoirs
Session: Poster Session 1
Publication date: 05 February 2018
DOI: 10.3997/2214-4609.201800041
Organisations: EAGE
Language: English
Info: Extended abstract, PDF ( 2.23Mb )
Price: € 20

Summary:
Seismic data decomposition into depth Local Angle Domain [LAD] opens a new way in creating high fidelity and high resolution seismic images, especially in complex geological settings, including fractured carbonates. Two LAD-derived complementary sets of angle common-image gathers, dip and scattering/opening, allow the data selection for the optimal illumination and the optimal aperture in seismic imaging. Moreover, dip angle gathers are core for separating the reflective and the diffractive components of the full seismic wavefield, procedure which is fundamental for diffraction imaging. Seismic diffraction is a key ingredient in establishing resolution, and it is a direct seismic expression of small structural and lithological discontinuities in the subsurface. Diffraction images define such discontinuous small-scale geo-features, with high resolution and high confidence. The integration of diffraction-imaged data with standard seismic-derived volumes like coherency and AVAZ/VVAZ anisotropy (all obtainable from the same survey), allows the reliable characterization of fracture fields.


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