80th EAGE Conference & Exhibition 2018
Opportunities presented by the energy transition
Seismic Inversion into Lithology/Fluid Classes
Sunday 10 June 2018
|Title:||Seismic Inversion into Lithology/Fluid Classes|
|Convenors:||H. Klemm (Total)
H. Omre (NTNU)
P. Avseth (NTNU)
Pre-stack inversion of seismic data to obtain elastic properties is a well-established technique in the oil industry, both during exploration and production. Many methodologies to classify elastic inversion results into lithology-fluid classes exist. This two-step approach faces many shortcomings, however.
Recent years have seen a growing interest in inversion for categorical properties such as lithology-fluid classes directly from pre-stack seismic data. The advantages of these methods range from the ability to capture extreme events to more reliable quantification of uncertainties. Moreover, lithology-fluid classification also make it possible to assign lithology specific and depth dependent rock-physics models that will better constrain the seismic inversion. Furthermore, the categorical classes allow the possibility to define multi-modal models for reservoir properties such as porosity and saturation.
This workshop aims at bringing together geophysicists, rock-physics researchers and statisticians interested in the topic both from a practical and research point of view. Case study presentations will be encouraged.
Who should attend
Researchers and practitioners with a keen interest in new developments in seismic inversion in general, and in categorical inversion into lithology-fluid classes in particular.
|Morning Session - Workflow/methodology|
|09:00||Probabilistic Seismic Inversion of Facies and Petrophysical Properties Using Gaussian Mixture and Markov Chain prior Models – A Norwegian Sea demonstration
T. Fjeldstad (NTNU), P. Avseth (NTNU)
|09:45||Discussion with opponent|
|10:05||Investigating the Relationship between prior Information and Seismic Resolution in a Bayesian Setting
P. Harris (Sharp Reflections)
|11:00||Facies-based Reservoir Characterisation through the Asset lifecycle
M. Kemper (Ikon Science)
|11:30||Solving for Facies in Seismic Inversion as Essential for Realistic Reservoir Models
H. Debeye (CGG)
|Afternoon Session - Case examples/4D-applications|
|13:25||Keynote - Exploring Constraints and their Effects - How a one-step inversion from seismic to lithology (Pcube+) allows for a variety of ways of including geological constraints, and their effects on a real data case from the North Sea
Ø. Skjæveland (Equinor)
|14:10||Discussion with opponent|
|14:25||Application of Sequential and Kalman Filters for 3D/4D Reservoir Characterization Challenges
R. Bachrach (Schlumberger)
|15:15||Fluid Prediction from Time-lapse Seismic AVO Data
O.B. Forberg (NTNU), H. Omre (NTNU)
|15:45||Probabilistic Inversion into Lithology and Fluid Classes in the North Sea – Comparison of one- and two-step approach
E. Aker (NR)
|16:15||Variational Bayesian Inversion of Quasi-Localized Seismic Attributes for the Spatial Distribution of Geological Facies
M.A. Nawaz (Univ. of Edinburgh), A. Curtis (Univ. of Edinburgh)
|17:00||End of workshop|
Please note that this programme is subject to change.