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POWER2D and POWER3D Velocity models can be systematically created for your 2-D and 3-D imaging requirements. Information from the interpreter, well data and seismic data combine to facilitate the imaging of complex geological structures.
We offer a unique evaluation service prior to embarking on major prestack migration work. Why not reduce the risk of embarking on expensive PSDM reprocessing only to find that the results do not live up to expectations. We do not require actual seismic data - only geological models. These can be easily emailed to choiceg@yahoo.co.uk Normally we are provided with horizon and velocity information from the Client. This information is used to build a 2-D velocity model. Simulating field acquisition parameters we acquire shot data using 2-D finite difference acoustic modeling.
The shot data are processed through a conventional seismic data processing stream through to prestack time migration.
Overthrust Model : Result of PreStack Time Migration The PSTM seismic data are processed through the velocity model building process and PSDM. The resulting depth image will give the Client a clear indication if PSDM is applicable. In the presence of complex geology PSDM is essential to correctly position and image seismic data.
Overthrust Model : Result of Initial PreStack Depth Migration. The Kirchhoff prestack depth migration has succeeded in imaging the data below the overthrust. These results are based on a tomographically unrefined velocity-depth model. However it proves that PSTM is a prerequisite for imaging in areas of severe lateral velocity variation. FOCUS 5.1 and POWER2D/3D share the same earth model and database enabling your time processing projects to flow naturally into complex time and depth imaging.
PreStack Time Migration PreStack Depth Migration Even for simple geological structures the use of velocity model building will result in a velocity field that will reduce structural positioning errors present in prestack time domain migration. Here the velocity model building process provides an imaging solution by extracting a good estimation of the interval velocity field. |
Send mail to
mrh@choicegeophysical.com with questions or comments about
this web site.
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