ICG/OSEG Lecture: Wednesday 27th October, 2010, 10:00 – 12:00
Lecture Title: Physics-based multidisciplinary integration for in-situ, quantitative characterization of the subsurface, Dr Ranajit Ghose, Delft University.
This lecture has been organised by ICG (International Centre for Geohazards) in collaboration with OSEG and will be held at the premises of NGI (Norwegian Geotechnical Institute), Sognsveien 72, 0855 Oslo (map). Dr Ghose gave a similar lecture as an EAGE Distinguished Lecturer for several years in a row.
Registration from 09:45
Lecture Description
A reliable estimation of the in-situ properties of the subsurface layers and their lateral variations are important in both deep and shallow subsurface explorations. Distributions of the in-situ porosity, permeability, fluid saturation are key targets in hydrocarbon exploration. They are also crucial in near surface exploration projects in civil, geotechnical and environmental engineering, as the use of the shallow subsurface becomes increasingly important due to urbanization and a sharp rise in the infrastructural loads. Also hydrogeophysical and environmental concerns call for such in-situ characterization. In the past, multi-disciplinary integrations have predominantly been qualitative (performed at the interpretation stage), empirical or statistical. In this talk, we shall discuss new possibilities for multidisciplinary quantitative integration of independently measured properties like seismic velocities and attenuation, high-frequency electromagnetic (GPR) wave velocities and angle dependence, poroelastic attributes in the (low-frequency) field seismic data, and geotechnical (cone penetration test) measurements, based on their underlying physics, trying to obtain reliable in-situ estimates of the subsurface properties. We will argue that an integration based on the underlying physics can take advantage of the inherent convexities in the multi-property domain, and this can lead to reliability and efficiency. The talk will build on results from synthetic tests as well as on real data examples. Although most of the ideas will be illustrated using near-surface geophysical and geotechnical data, the basic concepts are valid also in the scale of deeper geophysical exploration.
This talk should be of interest to all involved in the shallow and deep subsurface related issues and engineering problems. The content has special relevance to civil, geotechnical, geo-environmental and agricultural engineering. Professionals engaged in hydrocarbon exploration, interested in new ideas for multi-tool data integration, property estimation, and shared earth models, in general, may also benefit from this lecture.
About the Lecturer
Dr. Ranajit Ghose is an Assistant Professor at Delft University of Technology, the Netherlands. He studied geophysics at Indian Institute of Technology, Kharagpur and earned a Ph.D. in geophysics from Kyoto University, Japan. He was engaged in industrial research for nearly a decade, before joining Delft University of Technology. His research interests are in shallow, high-resolution seismics with focus on shear waves, specialized high-frequency vibratory sources, poroelasticity, quantitative physics-based integration of seismic, electromagnetic and geotechnical data, shared earth models, geotechnical geophysics, and seismology
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