000			01753nab a2200217 4500
005			20260520002038.0
008			260224s2012 xxu ing
041			_aInglés
245	0	0	_aEstimation of Relative Permeability by Assisted History Matching Using the Ensemble Kalman Filter Method
260			_a _b _cmayo 2012
270			_a03/12/2012 ; 03/12/2012
300			_a9 p. ; 205-214
520			_aTranscripción 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.
581			_a3
773	0		_tJournal of Canadian Petroleum Technology _g51
942			_cARTICULO
100	1		_aChen, H. _952794
100	1		_aYang, D. _921331
100	1		_aTontiwachwuthikul, P. _952795
999			_c187467 _d187467