Dec 6th-Data Proc. & Acquisn. SIG: Linking Seismic Imaging and Inversion: SEAM 1 Case Study*
Sponsored by Schlumberger
Event Location:
Schlumberger
Q Auditorium
10001 Richmond Avenue
Houston TX 77042 USA
NOTE: You Must be Logged in to Register
Speaker: Dr. Konstantin Osypov, Chevron
Seismic image and its attributes are essential in conditioning reservoir models. However, image resolution is limited and commonly not enough to extract complex 3D facies geometries. While elastic full-waveform inversion in the full frequency band is gradually emerging, current industry practices still rely on a separation between imaging and inversion. The talk discusses the workflows combining imaging and inversion and limitations of the approximations used. In particular, a common seismic inversion workflow relies on depth-to-time stretch of a depth image using an acoustic approximation (prestack or poststack) and 1-D convolutional model in time domain. This approximation is insufficient for complex 3D stratigraphy and strong multi-scale velocity heterogeneities. Furthermore, quantitative inversion requires accurate amplitude treatment in processing and “true amplitude” migration with illumination compensation not only for AVA/AVO purposes, but even for poststack inversion and stratigraphic interpretation. 3D deconvolution/inversion in depth domain using point-spread functions (PSF) is an alternative emerging approach. This case study of acoustic and elastic “SEAM I” synthetic compares application of 1D and 3D deconvolution/inversion methods applied to RTM and Gaussian Beam images. Since SEAM elastic synthetic is a pretty good approximation of a seismic experiment in the real Earth, the study reveals some insights on seismic resolution and pushes the envelope for enhancing extraction of reservoir models from the image.
Speaker Biography: Konstantin Osypov, Chevron
Konstantin Osypov received his Ph.D. in geophysics from St. Petersburg University, Russia, in 1992. After working as a postdoc at the University of Uppsala, Sweden, and the Colorado School of Mines, he joined Western Geophysical R&D in Denver as a Senior Research Geophysicist in 1997. He has since held several positions with Schlumberger and WesternGeco in Moscow and Houston. His last assignment in Houston was Research Manager for Earth Model Building Technologies. He joined Chevron in Houston in 2014 and currently he is Project Manager, Interpretive Imaging Strategic Research.
Time Schedule:
4:30 PM – sign-in, social time
5:00 PM – start of presentation
6:00 PM - close of meeting
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