DepthCon2000

 

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DepthCon2000 and its Demonstration Download

 

Even with substantial knowledge of rock deformation styles, to correctly pick repeatedly-faulted sections on seismic is a difficult job for the interpreter. In thrust belts and serially-extended basins the dislocation of older rollovers by renewed episodes of faulting creates complex geometries which are typically difficult to resolve on time-distorted seismic. To conceive and evaluate new plays in complex areas we require simple and intuitive ways to experiment with the data.

DepthCon2000 is designed for practical, very inexpensive geological modelling directly with seismic profiles. Its purpose is to give you the capability to quickly test and improve your geological models for depth conversion. Its proved its value in service, as an excellent tool for analysing complex seismic.  

Starting with a scanned or clipboard-imported bitmap, there are four main capabilities in the software:

- You can depth convert using a function, V = Vo + kt, where you input an initial interval velocity and rate of change of velocity with depth, to get a quick-look answer for first-pass depth conversion requirements. The depth conversion process performs the integration of that function and redisplays the section in depth. This program doesn't require any picks to have been made, and will place a section approximately in depth for introductory interpretation with much of the section distortion removed.

- You can depth convert by sketching a colour-filled interpretation overlay on the target seismic section, using the program's own line and polygon draw software. Each colour field is given an appropriate interval velocity; and the program will then marry this colour model pixel-by-pixel with your target seismic to produce a good-quality seismic depth image. The conversion process can be run in a few seconds once the data are set up, and then repeated with new velocities or polygon shapes until results match the available control. 

- You can line-length balance between pins, and draw pre-deformation templates which show the fault trajectories.

- You can restore the seismic, rejoining displacements on faults to investigate the structural history of the prospect.

With the restoration software you can un-deform the seismic, restoring the structure with the program preserving the full quality of the bitmap image; you can drag and drop the fault surface, repeating the displacement, until good restorations are achieved which match the seismic control. When you can make a good restoration, your model is geologically reasonable. That doesn't mean its correct, it means it is geometrically sensible.

When you have a geologically reasonable model, you can depth convert again; all with the full control of the seismic image. Then you can run a second, still more detailed restoration, and you'll be able to reconstruct the history of deformation using the seismic depth image. This of course means that confidence in the interpretation will be raised and there is a better chance that all of the elements of the structure will be identified. With DepthCon2000 you can tackle very high degrees of complexity in interpretation problems, quickly resolving the geometry of cross-cutting thrusts and extensional faults, salt problems, and across-fault correlation questions. Its a valuable capability.

You could also use it in processing work. For example take the velocity model and run a PSDM on the line for comparison. There could be very large savings of time and effort in using DepthCon2000 to quickly build an initial velocity model which is geologically sensible.

 

How DepthCon2000 works

Any bitmap which you have on file can be imported, directly if it is a .bmp or indirectly off the clipboard and re-saved as your starting bmp, if it is some other kind of bitmap format. Trim and rotate as may be required to get the image you want, and the program is ready to run. Of course DepthCon2000 gives you the option to work with paper sources, using scanned unpicked or working seismic sections.

The program's clip and rotate facilities are used to straighten the bitmap and trim its top to datum (Both these operations use the same image processing as is used in the depth conversion, to retain the quality of the seismic).

The powerful colour-fill method is the primary mode of the program, where it combines the time section and the colour overlay to depth-convert the seismic pixel distribution. This method allows for complex velocity variations and is a sophisticated capability. Gaps between the polygons in the colour fill are given the last-known velocity, and so the definition of polygons need not be done with high accuracy.  The polygon file can be saved, for subsequent changes to the shapes of the colour fields. These colour fields can be drawn quite roughly, any gaps left are handled by the program.  

Interval velocities are entered into a flex grid database, by clicking on each colour and keying-in the appropriate value.

And the colour-fill is then married with the seismic profile, pixel by pixel, to give a natural-scale depth conversion which preserves the pixel quality.

The section balance capabilities comprise line-length checks, and area-balanced vertical and inclined-shear displacement on fault surfaces sketched using the editor. The shear module can be run repeatedly on a given fault, varying the shape of the fault and its displacement until the desired results have been achieved. Its a very simple and direct way to test correlations and to understand the structure history implications of picks made with complex seismic, and it interlinks nicely with the depth conversion option. As your understanding of the structure develops, you can amend picks and re-run the depth conversion, to converge on a balanced model which includes all the key elements of the structure and is geometrically valid.

 

What next?

Well, we hope that you'll want to download the demo and experiment with it; or we can send you a CD, if you prefer. 

The best way to look at DepthCon2000 is to take a trial license and use your own data, and we can offer you a trial of the program without obligation, for a month or so.

We can also interpret sections for you on a consulting basis.

Please let us know how we can help you!

 

The current price of DepthCon2000: April 2004:

 

 Description

UK Pounds

US Dollars*

DepthCon2000 single-user

324

499

* US Dollar price may vary with the exchange rate. The price excludes mailing costs, and any customs or import charges which might arise in delivery. The program can be ordered directly from ourselves, or via Rockware in Colorado, its in their catalog.

 

Download the demo and its tutorial

DepthCon2000 can be downloaded in demo form from this site, with a full tutorial for the depth conversion operations of the program and a limited capability for work with the Shear option, and we hope you'll wish to take a closer look at it. Please also read the license terms of use for this software. 

This link will take you to the download page: 

 

 

Download

 

 

 

 

This site is maintained by John Nicholson. All photography is copyright.    İHighland Geology Limited 2004