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Structure Oriented Coherence for 3D Stratigraphic Feature CharacterizationNormal access

Authors: T.Y. Wang, S.Y. Yuan, Y.X. Su, J.H. Wang and S.X. Wang
Event name: 80th EAGE Conference and Exhibition 2018
Session: Poster: Seismic Interpretation B - Seismic Atrributes
Publication date: 11 June 2018
DOI: 10.3997/2214-4609.201801266
Organisations: EAGE
Language: English
Info: Extended abstract, PDF ( 566.82Kb )
Price: € 20

Structural and stratigraphic discontinuities, such as faults and channels, usually contribute to the construction of traps and reservoirs, since it can form storage space and provide migration for oil and natural gas. The coherence technique has been widely used to identify these abnormal features in the subsurface. We propose a structure oriented coherence for 3D stratigraphic feature characterization by orienting the coherence calculation perpendicular to seismic structures using both dip scanning and multi-azimuthal searching. Through analyzing both the coherence slices and seismic profiles, we can acquire more accurate evaluation of stratigraphic feature in the target reservoir. The proposed structure oriented coherence attribute is applied to a 3D synthetic data and a 3D real data involving a tight sandstone reservoir in Southwest China. Compared with the conventional coherence attribute, the structure oriented coherence result shows the less low-valued artifacts but highlight more weak or hidden geological edges, which can help to guide the deployment of exploration wells for oil and nature gas in this region.

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