October 14, 2021 in-person Luncheon – Edward Jenner – In Person Registration Closes 10/11 at midnight!

Note:  In-person registration closes at midnight, October 11!  Don’t delay registering!

12:00 at Wynkoop Brewery, 1634  18th St. Denver, CO 80202

We will be hosting this as an in-person luncheon and also online via webinar.  Please register for one or the other; please note that webinar registrations will not include in-person attendance or lunch.

Resolving Azimuthal  Velocity and Amplitude Characteristics of the SEAM-Barret Model; A Synthetic Dataset with Near Surface Complexity

Ed Jenner, Land Noise Specialists, Denver, CO

Abstract:

Realistic synthetic data from the SEAM-Barrett model offers an approach to measure the reliability of the complex multi-step procedure of going from seismic field acquisition to reservoir characterization. An important part of the multi-step procedure is accurate seismic processing to preserve the seismic amplitude signatures of the reservoirs.

Previous authors (Van De Coevering et al., 2020 SEG annual meeting), were unable to obtain reliable azimuthal velocity or AVO results.  In addition, their amplitude analyses showed a strong imprint of the near surface geology.  In their analysis, they attempted to use the dense data sampling and a smoothed ‘correct’ velocity model to overcome statics and noise issues in the data.

Our results from a conventional processing sequence demonstrate we can resolve the reservoir geobodies’ signature in the seismic image amplitudes. Furthermore, our results show promising AVO and AVAz patterns without the imprint of the near surface.

Azimuthal velocity results also pick up the majority of the model variations, although the interval anisotropy magnitudes are not quantitatively reliable.  This is despite the fact that we need to resolve azimuthal variations in traveltimes of only +/- 3ms at the far offsets from data that have a maximum frequency of 50Hz.

This study confirms the application of a conventional processing sequence for azimuthal analysis, even in the presence of moderately complex structures and near surface heterogeneity.

Dr. Jenner is a research geophysicist for Land Seismic Noise Specialists.  After completing his Ph.D. at the Colorado School of Mines in 2001 he joined AXIS Geophysics and in 2003, Dr. Jenner was awarded the SEG Clarence Karcher Award for his work in the field of azimuthal anisotropy.  From 2002 to 2015 Dr. Jenner was Land R&D manager for ION Geophysical where he continued to focus on velocity anisotropy, AVO, azimuthal AVO and anisotropic time and depth imaging and more recently frequency enhancement for seismic data.

Edward also holds a B.Sc. in Physics with Astrophysics from the University of Birmingham, UK, and an M.Sc. in Geophysics from the University of Leeds, UK.