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Title: Effect of wettability on scale-up of multiphase flow from core-scale to reservoir fine-grid-scale

Typical field simulation grid-blocks are internally heterogeneous. The objective of this work is to study how the wettability of the rock affects its scale-up of multiphase flow properties from core-scale to fine-grid reservoir simulation scale ({approximately} 10{prime} x 10{prime} x 5{prime}). Reservoir models need another level of upscaling to coarse-grid simulation scale, which is not addressed here. Heterogeneity is modeled here as a correlated random field parameterized in terms of its variance and two-point variogram. Variogram models of both finite (spherical) and infinite (fractal) correlation length are included as special cases. Local core-scale porosity, permeability, capillary pressure function, relative permeability functions, and initial water saturation are assumed to be correlated. Water injection is simulated and effective flow properties and flow equations are calculated. For strongly water-wet media, capillarity has a stabilizing/homogenizing effect on multiphase flow. For small variance in permeability, and for small correlation length, effective relative permeability can be described by capillary equilibrium models. At higher variance and moderate correlation length, the average flow can be described by a dynamic relative permeability. As the oil wettability increases, the capillary stabilizing effect decreases and the deviation from this average flow increases. For fractal fields with large variance in permeability, effectivemore » relative permeability is not adequate in describing the flow.« less
Authors:
; ;  [1]
  1. Univ. of Houston, TX (United States)
Publication Date:
OSTI Identifier:
508532
Report Number(s):
CONF-970317--
ON: DE97004613; TRN: 97:003410-0040
Resource Type:
Conference
Resource Relation:
Conference: 4. international reservoir characterization technical conference, Houston, TX (United States), 2-4 Mar 1997; Other Information: PBD: [1997]; Related Information: Is Part Of 4. International reservoir characterization technical conference; PB: 726 p.
Research Org:
BDM Corp., Bartlesville, OK (United States); American Association Petroleum Geologists, Tulsa, OK (United States)
Country of Publication:
United States
Language:
English
Subject:
02 PETROLEUM; 58 GEOSCIENCES; RESERVOIR ROCK; FLUID FLOW; HETEROGENEOUS EFFECTS; PERMEABILITY; DRILL CORES; WETTABILITY