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LIVE WEBINAR – Know Before You Go! Using Ray-Based Seismic Modelling to Reduce Risk

Tuesday, 29 June, 2021 @ 11:00 am - 12:00 pm (Australia/Perth time)

Free – $10.00

To view the event video and associated handouts (if any), please either log in to your active PESA membership account or enter the event password you received when you registered for this event.

Guest Speaker(s): Lars Zühlsdorff

Lars Zühlsdorff graduated at the University of Karlsruhe, Germany, in 1995 and received a PhD from the University of Bremen, Germany, in 1999. His thesis was about using high-resolution seismic data to find evidence for thermally and tectonically driven fluid upflow in the Cascadia Basin and at the Cascadia Margin. He maintained station networks in France and Kenya and collected two years’ worth of experience on research vessels, trying to acquire marine seismic data on a university budget. In 2005, he joined NORSAR and carried out ray-based modelling studies for major oil companies and the seismic service industry. He currently is Principal Research Geophysicist at NORSAR Innovation located close to Oslo (Norway).

Kindly supported by Rock Flow dynamics


This live webinar will take place at:

11am              – Perth
12.30pm       – Darwin, Adelaide
1pm                – Brisbane, Canberra, Hobart, Melbourne, Sydney

Use the calendar link on this page to add this event in to your own calendar at the correct local time for your location.

Tickets are free for members (please log in to see this) and $10 for non members.

Please buy your tickets and immediately follow the link in the ticket e-mail (not the calendar invite or this webpage, which is just generic and not event specific) to set up your registration with the webinar software well in advance of the time of the talk. Once registered with the webinar software you will receive a reminder e-mail 1 hour beforehand.


Know Before You Go! Using Ray-Based Seismic Modelling to Reduce Risk

Presented by Lars Zühlsdorff


Field managers are required to make costly decisions, relying on data that can almost always be improved in some way. Entire projects are in jeopardy if the wrong questions are asked, or if the answers are not sufficiently sound. Will a new survey be fit for purpose? Is the data causing issues, is it geology, or could it be the processing flow? Should one try something new to improve imaging or repeat the old (for time-lapse reservoir information)? How can we improve interpretation to mitigate risk? Balancing cost and benefit is sometimes the most challenging part, but perhaps it doesn’t need to be. Ray-based seismic modelling may not make the decision for you, but it can provide essential information before proceeding with a calculated risk. Moreover, it has developed to become an efficient alternative to more comprehensive, but also more expensive and time consuming, full wavefield modelling. Overall, the motivation for modelling studies is very simple – they are significantly cheaper than failing in the field!


Tuesday, 29 June, 2021
11:00 am - 12:00 pm
(Australia/Perth time)
Free – $10.00
Event Categories:
  • Venue

    The internet Australia


    PESA Western Australia
    PESA Webinars

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    Non member
    $ 10.00 inc GST