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Fig. 5 | Earth, Planets and Space

Fig. 5

From: Synthetic modelling of downhole resistivity data to improve interpretation of basin morphology from magnetotelluric inversion

Fig. 5

Summary of synthetic modelling conducted using downhole resistivity from petroleum wells. a Todd 1 (Kress and Simeone 1993), b Bradley 1 (Kress 1989), and c Beantree 1 (Green et al. 1963). From left to right for: downhole logged geology, limestone units in grey, siliciclastic units in white and basement in red; measured downhole resistivity, black logarithmic scale, blue linear scale, dashed line represents the averaged resistivity used to create the 1D model; 1D synthetic model created from downhole resistivity data, annotated with resistivity (Ωm), basement interface indicated with black dashed line; results from Occam1D inversion, model in thick dashed line, minimum layer model green, n = 100 model blue; 1D MT SimPEG inversion, model in dashed line, inverted response in blue, major resistivity packages annotated; rj-McMC MT inversion with automatically generated changepoint probability; Occam 2D inversion results for BBMT and AMT frequency ranges. Colour scale applies to all plots, including models. Gl Georgina Limestone, Bm basement, Ar Arrinthrunga Formation, Nm Nimaroo Formation, Sh Sun Hill Arkose, Pl Pomegranate Limestone, Ud Undifferentiated, Ar Arrinthrunga Formation, Wl Wilgunya Subgroup, Nm Nimaroo Formation, Th Thorntonia Limestone

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