Ziggy 3D Numerical Model

October 2002

The Subsalt Multiples Attenuation and Reduction Technology Joint Venture (SMAART JV) is releasing to the industry and universities the 3D numerical model referred to as Ziggy.

The Ziggy geologic model for was developed by Dean Stoughton at BHP to represent a generalized structure of exploration interest found along the Sigsbee Escarpment in the deep water Gulf of Mexico. Figure 1 & Figure 2 illustrate key structural features of the model. The simple region south of the Sigsbee Escarpment includes a flat water bottom, smooth and thin "Potato" Salt overlaying an elongate ridge anticline. The complex region at the Sigsbee Escarpment includes a dipping water bottom, rugose top of salt, steep dip on base of salt overlaying an anticline with 3 peaks in the cross line direction.

The GoCad model contains the following elastic properties for the model layers. Note that layer #2, 9 and 12 do not exist in the model. As stated in the Data Release Agreement, this numeric model is not warranted to match any real or physical model data.

Layer Velocity Density
1 (Water) 1485 1.0
3 2147 1.84
4 2328 1.82
5 2628 1.87
6 2742 1.90
7 2770 1.88
8 2919 1.68
10 3950 2.25
11 2500 1.00
13 (Salt) 4850 2.35

The current release includes the velocity model and allows anyone to use the data and to publish the results under the conditions described in the Data Release Agreement.

This release is available via the Smaart Data Administrator. Contact the Smaart Data Administrator for prices.

To obtain the data, sign the Data Release Agreement (PDF file) and fax it to Edo Bergsma at +31 15 2783499 or mail it to:
Delft University of Technology
Faculty of Applied Sciences
Acoustical Wavefield Imaging
attn. Edo Bergsma
P.O. Box 5046
2600 GA Delft
The Netherlands.

To contact the Smaart Data Administrator, send email to E.Bergsma@tudelft.nl

We hope you will find the data useful for current and future research.

Edo Bergsma
Smaart Data Administrator