OSEG meeting: Tuesday June 2, 2009 At 08:30 Am

EAGE Distinguished Lecture: 3D and 4D Petrophysical Seismic Inversion, Thierry Coleou

The meeting is kindly sponsored by CGGVeritas  and will be held at the Felix Conference Center, Aker Brygge

Lecture Description

Duration: 3 hrs - half a day

The petrophysical seismic inversion is a method driven by petro-elastic models. It updates a fine-scale geological model in Depth to make it fully compatible with pre-stack seismic measurements and is a patented technique initially developed in collaboration between Marathon Oil and CGGVeritas.

The extension to 4D, developed in collaboration with StatoilHydro is a natural extension as saturations and pressure are explicitly handled in the petro-elastic models and can be optimized with time-lapse seismic measurements, under control from production data.

The lecture touches on petro-elastic models and seismic elastic forward modeling, and proceeds to pre-stack and time-lapse seismic inversion, including the interaction of seismic processing and reservoir model building.
Integration of geological, geophysical and production information requires Geomodels compatible with flow simulators as well as geological modeling, seismic interpretation and inversion; the elusive “Shared Earth Model” with its associated issues:

• Scale: small-scale features, potentially below seismic resolution to represent heterogeneities critical for flow simulation and for the validity of the petro-elastic model.
• Different domains: Two-way travel times and Depth.
• Multi-axes handling for time-lapse: Depth if compaction occurs and different TWTime per vintage.

About the lecturer

Dr. Thierry Coléou has twenty years of international experience in the oil industry with CGG, now CGGVeritas, after five years in the mining industry. He is a geologist by training, with a PhD in Geostatistics and working for a geophysical service company. He works in close collaboration with E&P clients, to provide solutions to problems across disciplines. He was involved in research and operational projects in seismic processing, seismic inversion, numerical modeling, geological modeling, depth conversion, well calibration and production related issues. He is also a lecturer on short courses on Geostatistics, depth conversion and well to seismic data calibration and a regular contributor to international conferences.

Who should attend?

Geoscientists with an interest in the challenges of data integration and of building models compatible with all available static and dynamic information.