Blar i Department of Mathematics på forfatter "Evensen, Geir"
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4D seismic history matching: Assessing the use of a dictionary learning based sparse representation method
Soares, Ricardo; Luo, Xiaodong; Evensen, Geir; Bhakta, Tuhin (Journal article; Peer reviewed, 2020-12)It is possible to improve oil-reservoir simulation models by conditioning them on 4D seismic data. Computational issues may arise related to both storage and CPU time due to the size of the 4D seismic dataset. An approach ... -
p-Kernel Stein Variational Gradient Descent for Data Assimilation and History Matching
Stordal, Andreas Størksen; Moraes, Rafael J.; Raanes, Patrick N.; Evensen, Geir (Journal article; Peer reviewed, 2021)A Bayesian method of inference known as “Stein variational gradient descent” was recently implemented for data assimilation problems, under the heading of “mapping particle filter”. In this manuscript, the algorithm is ...