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Multidimensional Gravity Gradient Modeling for 3D Salt Delineation in the Nordkapp BasinNormal access

Authors: S. Panepinto, I. Guerra, M. Mantovani and L. Masnaghetti
Event name: 79th EAGE Conference and Exhibition 2017
Session: Potential Fields - Gravity, Magnetics and Integration
Publication date: 12 June 2017
DOI: 10.3997/2214-4609.201700560
Organisations: EAGE
Language: English
Info: Extended abstract, PDF ( 1.23Mb )
Price: € 20

Summary:
We present an alternative and cost-effective approach for 3D salt delineation in frontier exploration areas. Our integrated multi-physics workflow combines the vertical tensor components of FTG data, anomaly enhancement techniques, interactive interpretive 2D modeling and 3D forward modeling for salt mapping. The benefit of the proposed approach is the ability to build a first-order 3D salt distribution over a wide area to assess salt volumes. The method was applied to a large FTG survey acquired in the Nordkapp Basin, Norway. Finally, the integrated multi-physics solution can be exploited for 1) Defining the sediment vs. salt ratio in salt basins, 2) Delineating areas of particular interest in terms of exploration prospectivity, 3) Identifying areas of broad salt overhangs, and 4) Ranking salt volumes for more refined 3D seismic acquisitions.


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