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Διάλεξη Dr. Per Avseth σε θέματα σεισμολογίας

  • Στοιχεία επικοινωνίαςΕ. Σώκοςemail:esokos AT upatras.gr

15.05.2009, Εργαστήριο Σεισμολογίας

ΠΡΟΣΚΛΗΣΗ ΣΕ ΔΙΑΛΕΞΗ

Ομιλητής: Dr. Per Avseth, Geophysical Adviser Odin Petroleum AS, Bergen, Norway Adjunct Professor, NTNU, Trondheim, Norway

Τίτλος: "Mind the Gap in Seismic Reservoir Prediction: How Rock Physics Can Bridge the Gap between Qualitative Geology and Quantitative Geophysics"

Ημερομηνία: Παρασκευή 15 Μαϊου 2009, ώρα 11:30.

Χώρος: Εργαστήριο Σεισμολογίας.

Περίληψη: The field of rock physics represents the link between qualitative geologic parameters and quantitative geophysical measurements. Increasingly over the last decade, rock physics stands out as a key technology in petroleum geophysics, as it has become an integral part of quantitative seismic interpretation. Ultimately, the application of rock physics tools can reduce exploration risk and improve reservoir forecasting in the petroleum industry. Traditionally, rock physics has focused on the understanding of how seismic signatures change as a function of hydrocarbon saturation, porosity, and pressure; with great breakthroughs made in laboratory experiments and theoretical modeling. Today, rock physics has extended its turf and plays an important role in the basin scale characterization of the subsurface, being an integral part of both well log and seismic data analysis. This lecture shows the importance and benefit of linking rock physics to geologic processes, including depositional and compactional trends. It further documents that lithology substitution can be as equally important as fluid substitution during seismic reservoir prediction. It is important in exploration and appraisal to extrapolate away from existing wells, taking into account how the depositional environment changes as well as burial depth trends. In this way rock physics can better constrain the geophysical inversion and classification problem in underexplored marginal fields, surrounding satellite areas, or in new frontiers. The presentation includes practical examples and a North Sea case study to demonstrate a best-practice workflow, together with limitations and pitfalls, where rock physics models are combined with well log and prestack seismic data, sedimentologic information, inputs from basin modeling, and statistical techniques to predict reservoir geology and fluids from seismic amplitudes.

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