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Abstract

Summary

Depth imaging of multicomponent data involves additional challenges of event registration and co-depthing. Marine multicomponent data usually comes from ocean bottom cable (OBC) or ocean bottom node (OBN) acquisitions. Therefore, two data sets need to be processed: P-waves (PP) and converted waves (PS). A P-velocity model can be built with techniques similar to the conventional streamer data processing, but the S-velocity demands special treatments. We propose a method for estimating P- and S-velocities by simultaneously inverting PP and PS seismic reflection residual moveout data and matching PP and PS horizons to well markers in a TTI anisotropic medium. We present a work flow to update the Vs component of a TTI velocity model using a tomographic co-depthing of PP and PS horizons based on an S-ray approximation for PS-horizon map migration. This method is integrated to tomography and allows fitting PP and PS residual moveouts simultaneously to horizon matching. Field data shows that this strategy yields more realistic velocity models than those obtained by simple 1D velocity model updates, providing depth images of superior quality.

© EAGE Publications BV
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/content/papers/10.3997/2214-4609.20140648
2014-06-16
2024-04-24

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References

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http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.20140648
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S-ray Approximation Tomography for PP and PS Horizon Co-Depthing
Conference Proceedings 2014, 1 (2014); https://doi.org/10.3997/2214-4609.20140648
/content/papers/10.3997/2214-4609.20140648
/content/papers/10.3997/2214-4609.20140648
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