Combining poroelasticity with Inversion, AVO and Elastic Impedance – A tribute to Ken Hedlin

Brian Russell

Brian Russell
CGG GeoSoftware, Calgary, Alberta, Canada

Wednesday, March 17th, 2021 – 12:00 PM MST


Ken Hedlin, who passed away on September 25, 2020, was a humble and gentle individual who was loved and respected by all who knew him.  He was also one of most innovative geophysicists I have ever known and worked with, and the Calgary geoscience community was lucky to have had him as a member. Ken’s paper at the 2000 SEG meeting in Calgary was truly ground-breaking and proposed introducing poroelasticity theory into seismic inversion analysis.  This lead directly to three papers in Geophysics in which poroelasticity was used to first generalize Lambda-Mu-Rho (LMR), then to generalize the three term Aki-Richards equation and finally to generalize Extended Elastic Impedance (EEI), for which the new term Extended Poroelastic Impedance (EPI) was introduced. In this talk, I hope to review the ideas behind all this work and pay tribute to Ken’s legacy in exploration geophysics.  Although reviewing all this material in a single talk is a tall order, I want to give you an idea of the immense creativity and passion for geophysics that Ken exhibited throughout his career.  It certainly inspired me.


Brian Russell holds a B.Sc. from the University of Saskatchewan (1975), a M.Sc. from Durham University (1978) and a Ph.D. from the University of Calgary (2004), all in geophysics.  He joined Chevron in Calgary as an exploration geophysicist in 1975 and subsequently worked for Chevron in Houston and then Teknica and Veritas in Calgary before co-founding Hampson-Russell Software with Dan Hampson in 1987.  Hampson-Russell is now a subsidiary of CGG, where Brian is Vice President, GeoSoftware.

Brian is involved in the research of new AVO, rock physics, inversion and machine learning techniques as well as giving presentations throughout the world (currently via online platforms!).  He is a Past-President of both the SEG and CSEG and has received Honorary Membership from both societies, as well as the Cecil Green Enterprise Award from SEG (jointly with Dan Hampson) and the 1999 CSEG Medal.

Brian is an Adjunct Professor in the Department of Geoscience and the CREWES Consortium at the University of Calgary. He is also on the board of the M.Sc. in Integrated Petroleum Geosciences (IPG) at the University of Alberta. He is registered as a Professional Geophysicist in the Province of Alberta.