Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
Study of Enhanced Oil Recovery by Low Salinity Waterflooding in Dual-Porosity Micromodels
Submission Author:
Victor Bastos Braga Coelho , SC
Co-Authors:
Victor Bastos Braga Coelho, Fabiano Wolf
Presenter: Victor Bastos Braga Coelho
doi://10.26678/ABCM.COBEM2023.COB2023-2132
Abstract
Understanding the characteristics of fluid flow in porous media is necessary for optimizing oil recovery in reservoirs. As a result, microfluidics has proven to be an attractive method for the study of processes involving displacement oil at pore scale. The aim of the present study was to evaluate the impact of the geometry of porous media on enhanced oil recovery (EOR) processes. Two micromodels manufactured in polydimethylsiloxane (PDMS) were used. The M1 micromodel contains a pore network composed only of connected macrochannels and solid grains, while the M2 micromodel contains a double porosity network, with macrochannels and micropore grains. Initially, the microdevices were filled with high salinity brine (HS). Afterwards, fluorinated oil (FC-3283) was injected until maximum oil saturation was obtained, followed by the injection of HS to observe the water-oil displacement. Finally, low salinity brine (LS) was injected into the system as enhanced oil recovery (EOR). The recovery process was evaluated based on the analysis of high resolution images. The low salinity waterflooding (LSWF) proved capable of recovering an additional amount of valuable oil, presenting greater efficiency in the model with low permeability (M1). Such results indicate a relationship between rock morphology, absolute permeability and low salinity waterflooding efficiency.
Keywords
Microfluidics, Enhanced oil recovery, Dual-porosiry, Two-phase Flow, Low Salinity Waterflooding
