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Proceedings Papers

Preventing Ensemble Collapse and Honoring Multipoint Geostatistics with the Subspace EnKF/EnS and Kernel PCA Parameterization

Pallav Sarma, Wen H. Chen
Paper presented at the SPE Reservoir Simulation Symposium, February 18–20, 2013
Paper Number: SPE-163604-MS
https://doi.org/10.2118/163604-MS
... like to obtain one or more history-matched models for each geological scenario. Similar issues also affect the ensemble smoother (EnS). We propose a new variant of the EnKF, called the subspace EnKF, to alleviate both these issues. The basic idea behind the subspace EnKF is to constrain each ensemble...
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