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Application of local angle domain diffraction imagingNormal access

Authors: Z. Song, E. Landa, K. Smirnov and C. Paleari
Event name: First EAGE Reservoir Characterization and Modelling Workflows for Giant Carbonate Field Developments of the Middle East
Session: Advances in carbonate reservoir modelling 
Publication date: 18 February 2019
DOI: 10.3997/2214-4609.201900205
Organisations: EAGE
Language: English
Info: Extended abstract, PDF ( 676.17Kb )
Price: € 20

Detection of fracturing zones and other subsurface discontinuities is important in optimal development of oil and gas reservoirs. Over last few decades, there has been significant progress in velocity model building and depth imaging. However there still remains many challenges related to the resolution and reliability of the obtained images, especially when the objective is represented by fractured reservoirs, e.g. carbonates. Recently diffraction imaging has increasingly generated interest as a method for fracture detection and delineation of small-scale subsurface elements such as faults, pinch-outs, karsts etc. These elements cause sharp changes/contrasts in the subsurface physical properties and geometry, and they are generic sources that scattered seismic energy . However the diffracted energy carries much lower intensity than the reflected one and it is difficult to make use of diffracted energy to identify and delineate the small-scale objects with conventional methods. The main aspect in diffraction imaging is accurate separation of the diffracted and reflected energy. In this paper, it will be shown that such separation can be performed efficiently in the structural dip-angle domain . The case study for carbonate reservoir will demonstrate diffraction imaging result with high resolution and reliability.

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