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The AAPG/Datapages Combined Publications Database

GCAGS Transactions


Gulf Coast Association of Geological Societies Transactions
Vol. 52 (2002), Pages 1003-1003

ABSTRACT: Integrated Modeling of Salt Features in a GIS Environment: Previous HitExamplesNext Hit from the Gulf of Mexico and Kazakhstan

Weber, R.W., Odegard, M.E.


Features such as salt dome, wings and turtle structures are important primarily for hydrocarbon exploration, but also for mining and storage. We integrate seismic, well, geological, gravity and magnetic Previous HitdataNext Hit to model salt features. More than 400 of these features were modeled worldwide. We present Previous HitexamplesNext Hit of these models along with Previous HitexamplesNext Hit of how the results were used in exploration, production and storage.

Our method begins with the assembly of seismic, well and geological Previous HitdataNext Hit, which are used to constrain the inversion and modeling of the salt. Magnetic Previous HitdataNext Hit are used to constrain basement features and the extent of salt. Densities are derived from well log Previous HitdataNext Hit and from lithologies.

Modeling begins with Cordell-Henderson inversion for the initial salt body shapes. The shape is then constrained further with available local seismic and well penetrations. The gravity Previous HitfieldNext Hit is calculated from initial and subsequent models using the Talwani-Ewing method. The measured gravity Previous HitfieldNext Hit, calculated Previous HitfieldNext Hit and their difference are displayed as GeoTiffs in a highly integrated ArcView GIS environment along with the salt contours as shape files. The contour shape files are edited in ArcView to better match the measured Previous HitfieldTop. This process continues in an iterative manner until the calculated and measured fields match closely. The final result can then be viewed with our 3-D model viewing software.

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Geophysical Exploration Technology, Inc. (GETECH), Stafford, Texas

Copyright © 2003 by The Gulf Coast Association of Geological Societies