Browsing NTNU Open by Author "Fjeldstad, Torstein Mæland"

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A Bayesian model for lithology/fluid class prediction using a Markov mesh prior fitted from a training image

Tjelmeland, Håkon; Luo, Xin; Fjeldstad, Torstein Mæland (Journal article; Peer reviewed, 2019)

We consider a Bayesian model for inversion of observed amplitude variation with offset data into lithology/fluid classes, and study in particular how the choice of prior distribution for the lithology/fluid classes influences ...
Bayesian Inversion and Inference of Categorical Markov Models with Likelihood Functions Including Dependence and Convolution

Fjeldstad, Torstein Mæland (Master thesis, 2015)

A convolutional two-level Markov model is studied in this thesis. The bottom level contains a latent Markov chain, and given the variables, the middle contains a latent Gaussian random field. We observe the second level ...
Spatial Gaussian Mixture Models Applied to Bayesian Seismic Inversion

Fjeldstad, Torstein Mæland (Doctoral theses at NTNU;2020:181, Doctoral thesis, 2020)

Summary Stochastic reservoir characterization of a subsurface is the process of creating a quantitative model of the subsurface based on various geophysical measurements to predict the occurrence of hydrocarbons such as ...