ASEG WA tech night: Basin-wide and multi-scenario modeling of rock property and AVO feasibility volumes

Title: Basin-wide and multi-scenario modeling of rock property and AVO feasibility volumes

Presenter: Dr. Per Avseth

Please see the Zoom link for the 18th May webinar: https://us02web.zoom.us/webinar/register/WN_-9wBWxOITtOYopFbRpVYpA

Summary:

One of the key tasks within the field of geoscience is to obtain a better understanding of the subsurface rock properties using remote sensing techniques (e.g., seismic and CSEM) and/or selected modelling tools. In mature areas with many wells and good quality seismic data, a data-driven approach can be used to predict rock properties between wells. In areas with limited well control and/or complex geology, we still rely on models to understand expected changes in rock properties between/away from wells, even though the seismic data is of good quality. Integration of geology and geophysics is a key to optimally select, constrain, and calibrate rock physics models. Lack of well log data can make it challenging to quantify uncertainties, but a scenario-based modeling with alternative geological scenarios and sensitivity testing of key input parameters can help us to better understand and possibly reduce the uncertainties away from well control.  In this presentation, I will demonstrate how a scenario-based feasibility modelling of rock physics properties, constrained by local geological inputs (mineralogy, facies, temperature, burial history, etc.) can give valuable information, that can be utilized before new seismic data are acquired (e.g., to decide whether certain types of data like AVO will be beneficial or not), or they can be used to guide the quantitative seismic interpretation of existing seismic data. 

Bio:

Per Avseth is a geophysical advisor and CTO of Dig Science in Oslo, Norway, and a part-time researcher at the Dept. of Electronic Systems at the Norwegian University of Science and Technology (NTNU) in Trondheim.  Per received his M.Sc. in Applied Petroleum Geosciences from NTNU in 1994, and his Ph.D. in Geophysics from Stanford University, California, in 2000. Per worked as a research geophysicist at Norsk Hydro in Bergen, Norway (2001-2006), a consultant at Rock Physics Technology (2006-2008) and Odin Petroleum (2008-2012) in Bergen, and as a geophysical advisor at Tullow Oil in Oslo (2012-2016). He held a position as an adjunct professor in reservoir geophysics at the Dept. of Petroleum and Geoscience at NTNU from 2008-2020. Per was the SEG Honorary Lecturer for Europe in 2009. He is a co-author of the book Quantitative Seismic Interpretation (Cambridge University Press, 2005), and has published extensively in the fields of rock physics and AVO analysis. His current research focuses on basin-scale rock physics and integration of basin modeling, sedimentology and rock physics.