4-D Physical Modeling of Tectonics and Basin Migration During Salt Mobilization at Passive Margins

Juergen Adam, Djordje Grujic, and Steven J. Ings
Dalhousie University, Halifax, NS

The Salt Tectonics Group utilises new 4D experimental techniques with scaled physical modelling and 2/3D monitoring of deformation to develop mechanical models for the tectonic evolution of sedimentary basins at passive continental margins to support oil/gas exploration in structurally complex areas.

In this study, we conduct a series of scaled 3D analogue experiments with mixed granular/viscous flow rheologies to simulate the structural evolution and migration of depositional centers during salt mobilization in a passive margin wedge. Fault kinematics, surface deformation and subsidence are monitored by high-resolution digital time-series data and 2D/3D optical strain monitoring techniques (Particle Imaging Velocimetry). The experimental data are used for the 4D visualisation of tectonic processes and to study the tectonic evolution, formation and migration of syntectonic basins in passive margin settings. Special emphasis is given to the coupling of tectonic and sedimentary processes, as well as on salt/rock interaction during sedimentary basin evolution.

The quantitative high-resolution 4D data from this new generation of experimental techniques can be used to develop new concepts for the interpretation of geological and seismic data relevant to basin modelling and petroleum system analysis and will significantly improve our understanding of continental margin evolution. Because the experimental data base is similar to results from numerical modelling this quantitative experimental technique will allow a direct comparison our coupling of analogue and numerical techniques.

AAPG Search and Discovery Article #90039©2005 AAPG Calgary, Alberta, June 16-19, 2005