Lunchbox Geophysics

Strange but True Stories of Synthetic Misties

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Rachel Newrick and Paul Anderson

Monday, April 21st, 2008 – 12:00 PM MST
Aquitaine Auditorium, +15 level of 540 - 5 Avenue SW

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LunchBox Geophysics is free! Simply bring your own lunch (refreshments provided) and enjoy.


Synthetic ties are one of the most critical steps in understanding what our seismic data tells us. We rely upon it for everything from identifying events on our seismic data to estimating the full waveform for inversion, but it is a step that is often taken for granted. Contrary to popular belief, log data is not ground truth, despite how we treat it as interpreters. Have you ever created a synthetic seismogram that has a dubious tie to seismic? Have you wondered why the synthetic seismogram changes significantly when the density curve is included? Have you queried the quality of the sonic and density logs input to your synthetic seismogram? Have you seen a synthetic seismogram change when a different software package is used? If you can answer yes to any of these questions and / or synthetic seismograms are not always simple in your world, then this is the talk for you.

We present the nuts and bolts of synthetic seismograms from the perspective of the seismic interpreter. What can go wrong, what does go wrong and what you can do to prevent falling into some of the pitfalls that arise.


Dr. Rachel Newrick was born and raised in New Zealand where she obtained her BSc in geology and BSc Honours in geophysics at Victoria University of Wellington. Since then, she has been a summer student for BHPP in Australia; spent 2 1/2 years travelling the world; worked for Veritas in Canada; undertook 4 month work terms with Occidental Petroleum and Exxon Mobil in the United States; co-authored a text book on exploration geophysics with Dr. Larry Lines and obtained a PhD in exploration seismology from the University of Calgary under the supervision of Dr. Don Lawton and Dr. Deborah Spratt. After graduating from the U of C in 2004, Rachel started work with Nexen Inc. in the Canadian Exploration New Growth Team as an exploration geophysicist, has worked on prospects across SK, AB and BC; worked on and traveled to Colombia as a geophysicist, and more recently visited Yemen and NE BC as part of her work in the Formation Evaluation Team where she has been for nearly a year.

She founded a motorcycle group for women in 1998 (Wild West Vixens) and a geoscience networking group for women in 2004 (GoGG - Girls of Geology and Geophysics). Both are going strong. In her spare time she is either travelling, skiing, dirt biking or road riding!

Paul Anderson received a Bachelor degree in geophysics from the University of Calgary. He is currently working as a geophysicist in the Exploration & Production Technology group at Apache Canada Ltd. In addition to work and family life, he has also started graduate work at the University of Calgary. Paul's current responsibilities at Apache include seismic processing QC, multicomponent processing & analysis, AVO analysis, inversions and rock properties, in Canada and abroad. Before joining Apache in January 2006, Paul was with Veritas GeoServices for 8 years, where he was an AVO and rock properties specialist. He has a wide range of experience in a number of geologic basins, including; Western & Northern Canada, the onshore Texas, Gulf of Mexico, Egypt & Australia.  Paul is currently a member of APEGGA, CSEG & SEG.