2
$\begingroup$

Looking through different literature articles and books concerning seismic inversion - mostly post-stack - phrases like "trace-based" and "model-based" keep appearing. I know that model-based in when lower-frequency info from either stacking velocities or low-pass sonic/rho logs are used. However, I do not know what trace-based inversion means or how it's performed. Can someone please help me with this?

$\endgroup$
3
$\begingroup$

I too have found this nomenclature rather confusing. I am pretty sure that trace-based inversion is merely where each seismic trace is inverted independently of surrounding traces. This would take into account most deterministic/probabilistic inversion types (e.g. model, coloured, sparse, etc). In contrast, geostatistical inversion would not strictly be trace-based inversion, as it uses a spatial and temporal variogram to takes into account the expected results of surrounding traces during the inversion, even though it does invert on a trace-by-trace basis. Confusing.

The following paper describes trace and geostatistical inversion methods: Germán Merletti, and Julio Hlebszevitsch. 2003. Geostatistical Inversion for the Lateral Delineation of Thin Layer Hydrocarbon Reservoirs: A Case Study in San Jorge Basin, Argentina. SEG 2003.

I've found the following paper very useful for understanding seismic inversion (geostatistical isn't discussed, though): Dennis Cooke and John Cant. 2010. Model-based Seismic Inversion: Comparing deterministic and probabilistic approaches. CSEG Recorder, Vol. 35, No. 4.

$\endgroup$
  • 1
    $\begingroup$ Just to add, trace-based inversions tend to assume that the data can be modeled as a convolutional process. This is a large simplification from the actual wave propagation, seismic acquisition, and data processing steps that need to occur before obtaining each post-stack trace. $\endgroup$ – Antonio Jun 29 '17 at 1:04

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.