Seismic attenuation, dispersion and anisotropy in porous rocks: mechanisms and models

2019 Honorary Lecturer
Pacific South

Boris Gurevich

Curtin University and CSIRO
Perth, Australia

Summary

Understanding and modeling of attenuation of elastic waves in fluid-saturated rocks is important for a range of geophysical technologies that utilize seismic, acoustic, or ultrasonic amplitudes. A major cause of elastic wave attenuation is viscous dissipation due to the flow of the pore fluid induced by the passing wave. Wave-induced fluid flow occurs as a passing wave creates local pressure gradients within the fluid phase and the resulting fluid flow is accompanied with internal friction until the pore pressure is equilibrated. The fluid flow can take place on various length scales: for example, from compliant fractures into the equant pores (so-called squirt flow), or between mesoscopic heterogeneities like fluid patches in partially saturated rocks. A common feature of these mechanisms is heterogeneity of the pore space, such as fractures, compliant grain contacts, or fluid patches. Using theoretical calculations and experimental data, we will explore how this heterogeneity affects attenuation, dispersion, and anisotropy of porous rocks. I will outline a consistent theoretical approach that quantifies these phenomena and discuss rigorous bounds for attenuation and dispersion.

Biography

Gurevich

 

Boris Gurevich has an MSc in geophysics from Moscow State University (1976) and a PhD from Institute of Geosystems, Moscow, Russia (1988), where he began his research career (1981–­­1994). In 1995–2000 he was a research scientist at the Geophysical Institute of Israel, where he focused mainly on diffraction imaging problems. Since 2001, he has been a professor of geophysics at Curtin University and advisor to CSIRO (Perth, Western Australia). At Curtin he has served as Head of Department of Exploration Geophysics (2010–2015) and since 2004 as Director of the Curtin Reservoir Geophysics Consortium. He has served on editorial boards of Geophysics, Journal of Seismic Exploration, and Wave Motion. He is a Fellow of the Institute of Physics and has more than 100 journal publications in the areas of rock physics, poroelasticity, seismic theory, modeling, imaging, and monitoring of CO2 geosequestration. His research achievements include development of advanced theoretical models of seismic attenuation and dispersion in heterogeneous porous rocks.

Schedule

Please contact Host Sections for lecture locations and times.

Date Location Host
13 Mar Perth, Australia Australian Society of Exploration Geophysicists (ASEG) – WA
15 Mar Canberra, Australia Australian Society of Exploration Geophysicists (ASEG) – ACT
19 Mar Brisbane, Australia Australian Society of Exploration Geophysicists (ASEG) – QLD
20 Mar Sydney, Australia Australian Society of Exploration Geophysicists (ASEG) – NSW
22 Mar Melbourne, Australia Australian Society of Exploration Geophysicists (ASEG) – VIC
25 Mar Adelaide, Australia Australian Society of Exploration Geophysicists (ASEG) – SA/NT
27 Mar Tasmania, Australia Australian Society of Exploration Geophysicists (ASEG) – TAS

Remaining schedule will be posted as soon as confirmed.

SEG Honorary Lecturers
Sponsored by:

Shell

This website uses cookies. If you continue without changing your browser settings, you consent to our use of cookies in accordance with our cookie policy. You can disable cookies at any time. Learn more

We also use partner advertising cookies to deliver targeted, geophysics-related advertising to you; these cookies are not added without your direct consent.

 

8801 S. Yale Ave. Suite 500
Tulsa, OK 74137
Phone: 918-497-5500
Email: members@seg.org

CONNECT with us

Don't miss a thing.

Visit your SEG Communications Center to update your communications preferences.

Don't have an SEG account? It's free to create one - and you don't have to be an SEG member.

Twitter facebook linkedIn instagram youtube

Register by 30 July and save!