Event Location:
CGG
10300 Town Park Dr.
Houston, TX  77072

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Speaker: Laurent Louis, Adage Corporation

As high resolution 3D images are getting increasingly incorporated into core analysis workflows, strategies for improving the connection between parameters in effective medium models and accessible metrics in image volumes are becoming more and more pertinent. Though the digital rock physics technology is traditionally associated with numerical simulations, the availability of 3D image data sets of ever improving quality also undoubtedly warrants sustained efforts in basic characterization and parameter extraction with the goal of feeding updated effective medium models. Two obvious advantages of effective medium models over numerical simulations are the immediateness of the prediction through functional relationships, and the added benefit of a conceptual phenomenological understanding. There are a number of known challenges to the prediction of elastic and mechanical properties, which for a large part stem from the multiscale heterogeneity that exists in the physical properties of a material's constituents, and the associated strain field. Nonetheless, by defining the model/image connection as our objective, a number of studies can be proposed which should lead to a coherent series of improvements.

This presentation starts with a review of a new stress-dependent strength model that was recently proposed for porous sandstones. After applying the model to a large published data set, we then reason on the significance of its parameters as well as on the possibility to quantify them directly through information extraction from X-ray CT images. Throughout this work, stress sensitivity emerges as perhaps the most critical aspect in the prediction of elastic and mechanical properties. The presence of two stress sensitivity elements in the model provides a seed to a comparison with the work that has been done on static and dynamic elastic properties, and guides our search for microstructural constraints in high resolution X-ray CT images.

Speaker: Laurent Louis, Adage Corporation
Laurent Louis was until recently a principal scientist at New England Research in VT, USA. He has previously held R&D roles at BP and Shell in Houston, and holds a PhD in geophysics from the University of Cergy-Pontoise (France). He specializes in rock mechanics, X-ray CT imaging and structural petrophysics. In 2018, he founded Adage Corporation, a technical services and R&D company focusing on the integration between rock physics data and X-ray CT images. Adage aims especially at progressing a capability for image-based prediction of geomechanical properties through effective medium modeling.

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5:15pm Refreshments
5:30pm Presentation Begins
6:30pm Adjourn

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