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50 Blocks Overnight!

With GDC's Wave Equation Prestack Depth Migration

Unparalleled turnaround time, improved accuracy, and reduced costs.

In exploration and production, the balance between risk and return is the key to success.

Depth imaging has proved to be an effective method for reducing risk. Because of improved data acquisition, depth processing, and close collaboration with the interpreters, geoscientists can now image thrust faults, subsalt, and rugged terrains; and they can identify potential drilling sites in areas that could not previously be investigated with conventional imaging technology.

To obtain the best imaging solution for the difficult geological environments in the Gulf of Mexico and other worldwide basins - where other more approximate imaging methods, such as the Kirchhoff, fall short-wave equation prestack depth migration repeatedly provides superior imaging and better amplitudes. Furthermore, it addresses the multi-arrival problems that trouble many ray-based Kirchhoff migrations, and it provides more accurate images of the subsurface.

In addition to resolving wave phenomena associated with complex geologic structures, wave equation prestack depth migration incorporates the full aperture to image deep, steeply dipping events, providing operational advantages over Kirchhoff migrations when performing full-volume imaging. Wave equation-based migrations also produce images having less background or operator noise than those produced by Kirchhoff migrations.

Geophysical Development Corporation has developed a new generation prestack wave equation migration that is perfectly suited for marine streamer data. Based on theory and technology developed previously by GDC, this new approach offers a very fast common azimuth wave equation migration that is quite capable of keeping pace with industry demands.

Once the velocity model is built and the data are loaded and prepared, the processing speed of this full-modeling methodology enables turnaround times of up to 50 blocks overnight.

Key Features and Benefits

• Processing speed - Very fast turnaround time - 50 blocks overnight after velocity model building and data loading and preparation.
• Multipathing and illumination - In areas of multiple ray paths, using the wave equation provides significant improvement in image quality and more accurate amplitudes.
• Superior handling of strong velocity contrasts - GDC's algorithm accurately handles steep dips and strong lateral velocity variations common in the Gulf of Mexico structures.
• Large aperture - Wave equation-based migrations incorporate full aperture to produce images having less background or operator noise.
• Local angle domain common image gathers output
• Cost effectiveness - In addition to the very fast turnaround time, GDC's algorithm provides high-quality images at an extremely competitive price.

Whether you are immersed in drilling operations or preparing for an upcoming offshore lease sale, the algorithm will provide faster, more accurate, and cost-effective wave equation prestack depth migration solutions to help you balance your E&P risk and return equation.

Assumptions & Requirements for 50 Blocks Overnight:

• Standard GOM or similar dataset.
• Common azimuth, wave equation migration algorithm.
• One (1) iteration.
• Velocity modeling is complete.
• All pre-processing is complete.

See our imaging examples of 2D & 3D synthetic datasets.

For more information, please contact GDC.