Singh, Institut de Physique du Globe de Paris. Summary
We describe a method to invert travel-time data under geostatistical constraints on the model structure and compressional velocities. Our formulation is based on the minimization of a joint objective function with a geophysical term describing data fit, and a prior information term describing the ge...
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| Format: | Text |
| Language: | English |
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| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.63.2717 http://lithos.esc.cam.ac.uk/~lithos/seg2003/Bosch_abstract_SEG2003.pdf.gz |
| Summary: | We describe a method to invert travel-time data under geostatistical constraints on the model structure and compressional velocities. Our formulation is based on the minimization of a joint objective function with a geophysical term describing data fit, and a prior information term describing the geostatistical model hypotheses. The latter are defined by prior velocities and interface depths, corresponding variances and spatial covariances. We applied the method to large aperture seismic data from the North East Atlantic margin, estimating a velocity and structural model that jointly explains travel times of major seismic phases and prior information. We derive for this example prior information on velocities from the statistical analysis of well log data, and we use structural interpretation of processed seismic data for defining model layers and prior interface depths. |
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