Seismic Modeling of Sulphate Dissolution and Karst Collapse Related Deformation

Jensen, S. L.; Hunt, Dan; Petersen, Sven

doi:10.3997/2214-4609-pdb.3.c013

66th EAGE Conference &Amp; Exhibition 2004

DOI: 10.3997/2214-4609-pdb.3.c013

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Seismic Modeling of Sulphate Dissolution and Karst Collapse Related Deformation

S. L. Jensen¹,

Dan Hunt²,

Sven Petersen³

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2008

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Simulating migrated and inverted seismic data by filtering a geologic model

et al. 2008

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The simulation of migrated and inverted data is hampered by the high computational cost of generating 3D synthetic data, followed by processes of migration and inversion. For example, simulating the migrated seismic signature of subtle stratigraphic traps demands the expensive exercise of 3D forward modeling, followed by 3D migration of the synthetic seismograms. This computational cost can be overcome using a strategy for simulating migrated and inverted data by filtering a geologic model with 3D spatial-resolution and angle filters, respectively. A key property of the approach is this: The geologic model that describes a target zone is decoupled from the macrovelocity model used to compute the filters. The process enables a target-oriented approach, by which a geologically detailed earth model describing a reservoir is adjusted without having to recalculate the filters. Because a spatial-resolution filter combines the results of the modeling and migration operators, the simulated images can be compared directly to a real migration image. We decompose the spatial-resolution filter into two parts and show that applying one of those parts produces output directly comparable to 1D inverted real data. Two-dimensional synthetic examples that include seismic uncertainties demonstrate the usefulness of the approach. Results from a real data example show that horizontal smearing, which is not simulated by the 1D convolution model result, is essential to understand the seismic expression of the deformation related to sulfate dissolution and karst collapse.

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Simulating migrated and inverted seismic data by filtering a geologic model

et al. 2008

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show abstract

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Seismic Modeling of Sulphate Dissolution and Karst Collapse Related Deformation

Cited by 1 publication

References 0 publications

Simulating migrated and inverted seismic data by filtering a geologic model

Simulating migrated and inverted seismic data by filtering a geologic model

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