Analyzing PSDM images in complex geology via ray-based PSF-convolution modeling
- Kristian Jensen (University of Bergen) | Isabelle Lecomte (University of Bergen) | Tina Kaschwich (NORSAR)
- Document ID
- Society of Exploration Geophysicists
- 2018 SEG International Exposition and Annual Meeting, 14-19 October, Anaheim, California, USA
- Publication Date
- Document Type
- Conference Paper
- 2018. Society of Exploration Geophysicists
- Modeling, Ray tracing, Prestack, Depth migration
- 0 in the last 30 days
- 21 since 2007
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A common problem encountered when migrating seismic data is the blurring and partial retrieval of the stratigraphic model of interest due to limited survey illumination, propagation effect functions of the overburden velocity, frequency-band limited wavelets, and more. Through the application of ray-generated 2(3)D spatial convolution operators, referred to as point-spread functions (PSFs), these blurring effects and partial illumination may be analyzed in more detail, which enhances our understanding of seismic image quality, prior or after acquisition and processing. To illustrate our purpose, we apply the method on the synthetic Sigsbee2A model at selected target areas, and study how, e.g., amplitude effects and aperture width affect the migrated image. A ray approach allows indeed for efficient sensitivity studies on various parameters, thus explaining differences in seismic image quality, while possibly helping fine-tuning imaging parameters.
Presentation Date: Tuesday, October 16, 2018
Start Time: 8:30:00 AM
Location: 205A (Anaheim Convention Center)
Presentation Type: Oral
|File Size||1 MB||Number of Pages||5|
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