Interactive inverse methodology applied to stratigraphic forward modelling

Geological Society Special Publication - Tập 239 Số 1 - Trang 147-156 - 2004
Chris Wijns1,2, Thomas Poulet1, Fabio Boschetti1, Chris Dyt1, Cedric M. Griffiths1
1Commonwealth Scientific and Industrial Research Organization PO Box 1130, Bentley, WA 6102, Australia
2School of Earth and Geographical Sciences, University of Western Australia, Crawley, WA 6009, Australia

Tóm tắt

Abstract An effective inverse scheme that can be applied to complex 3-D hydrodynamic forward models has so far proved elusive. In this paper we investigate an interactive inverse methodology that may offer a possible way forward. The scheme builds on previous work in linking expert review of alternate output to rapid modification of input variables. This was tested using the SEDSIM 3-D stratigraphic forward-modelling program, varying nine input variables in a synthetic example. Ten SEDSIM simulations were generated, with subtle differences in input, and five dip sections (fences) were displayed for each simulation. A geoscientist ranked the lithological distribution in order of similarity to the true sections (the true input values were not disclosed during the experiment). The two or three highest ranked simulations then acted as seed for the next round of ten simulations, which were compared in turn. After 90 simulations a satisfactory match between the target and the model was found and the experiment was terminated. Subsequent analysis showed that the estimated input values were ‘close’ to the true values.

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Geological Society Special Publication

Tập 239 Số 1

147-156

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