01753nab a2200217 4500 20260520002038.0 260224s2012 xxu ing Inglés Estimation of Relative Permeability by Assisted History Matching Using the Ensemble Kalman Filter Method mayo 2012 03/12/2012 ; 03/12/2012 9 p. ; 205-214 Transcripción del resumen del autor An ensemble-based history technique has been applied to implicitly estimate three-phase relative permeability curves from production data. A power law representative of relative permeability curves is used. Both endpoints and shape factors of relative permeability curves are included in state vectors that are updated sequentially by assimilating observation data. This method has been validated by accurately evaluating relative permeability in a synthetic reservoir with 2D, three-phase flow. It is shown from the synthetic case that good estimation of relative permeability curves can be obtained by assimilating the observed oil rates, gas/oil ratios, and bottomhole pressures of production wells. Both shape factors and endpoints of relative permeability curves are accurately evaluated; however, a larger ensemble size is needed to avoid filter divergence. Compared with the existing implicit methods, the ensemble-based history matching technique does not require the gradient of the objective function, which makes the technique easy to implement. 3 Journal of Canadian Petroleum Technology 51 ARTICULO Chen, H. 52794 Yang, D. 21331 Tontiwachwuthikul, P. 52795 187467 187467 0 0 0 0 255286 BAAB BAAB 2026-03-06 200059583 0 200059583 2026-03-06 00:17:20 2026-03-06 ARTICULO