Velocity Model Building in Complex Settings

The two presentations will be on land/shallow marine model building in the Middle East and on deep marine model building in salt dominated geologies as encountered e.g. in the Gulf of Mexico. These are two examples that we expect to feature prominently during the workshop. They are complex for different reasons, but present day solution strategies have common denominators.

In the Middle East, the difficulties in velocity model building are typically to estimate an accurate near surface model including topography (e.g. dunes) and to reliably identify primary reflections in seismic records, which are oftentimes overwhelmed by (scattered) ground roll, multiple reflections and mode conversions. In salt dominated geologies as encountered in the Gulf of Mexico, the problem is more in extreme structural complexity. Carapaces, recumbencies, sutures, salt stems and feeders, etcetera are difficult to accurately capture in a model and this is aggravated by poor illumination conditions in such structurally highly complex settings.

Solutions are being sought in long offset, broadband, continuous recording wide azimuth data acquisition, enabling wave equation based inversion strategies. The two presentations will highlight some of the difficulties in each category and touch upon the role of novel data acquisition and seismic imaging in addressing these difficulties. They are meant to set the scene for the workshop.

The purpose of this webinar is to promote the SEG velocity model building workshop scheduled for March 9-11, 2021 in Al Khobar, Saudi Arabia. A call for abstracts for this workshop is out and will be open till November 2nd 2020.

  • Panelist: Fons ten Kroode, Shell Global Solutions International
  • Panelist: Moosa Jahdhami, Petroleum Development Oman
  • Moderator: Abdulaziz Al-Saad, Saudi Aramco
  • Regional Timings: 5:00 PM UAE | 4:00 PM KSA | 3:00 PM EGY

Speaker Bios

Fons ten Kroode

Fons ten Kroode joined Shell Research as a Mathematical Physicist in 1991 and has been working there in various roles, among which as head of Shell’s Seismic Imaging R&D program. Over the years, he has worked on a variety of R&D projects, including multiple attenuation, velocity estimation by Full Waveform Inversion and Wave Path Tomography and Least Squares Imaging. He is currently leading an Acquisition and Signal Processing R&D team. One of his current interests is to develop signal processing techniques which are firmly based on inverse problem theory as encountered in model building and imaging.

Moosa Jahdhami

A Seismic Processing Geophysicist at Petroleum Development Oman since 2009, holding bachelor and master degrees on Geophysical Sciences from Leeds university, United Kingdom. Moosa worked in Shell Netherlands from 2014 to 2017 as part of his international assignment. During his career in Petroleum Development Oman and Shell International, he worked on Signal Processing and Depth Imaging of Land Seismic Data, and was involved in various R&D projects. Moosa is experienced in WAZ Processing, Seismic Imaging, Multiple Attenuation and Full Waveform Inversion.

Abdulaziz Al-Saad

Abdulaziz Al-Saad is a Geophysicist working in the Geophysical Imaging Department for Saudi Aramco Exploration Admin Area with a focus on Near Surface Geophysical Modeling. Abdulaziz Al-Saad received his B.Sc. in Geophysics for University of New Orleans, New Orleans, Louisiana. His research interest are on Near Surface Modeling and Borehole Geophysics.