An experimental and numerical study of low salinity effects on the oil recovery of carbonate limestone samples von Felix Feldmann | ISBN 9783736971769

An experimental and numerical study of low salinity effects on the oil recovery of carbonate limestone samples

von Felix Feldmann
Buchcover An experimental and numerical study of low salinity effects on the oil recovery of carbonate limestone samples | Felix Feldmann | EAN 9783736971769 | ISBN 3-7369-7176-1 | ISBN 978-3-7369-7176-9
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An experimental and numerical study of low salinity effects on the oil recovery of carbonate limestone samples

von Felix Feldmann
Low-salinity waterflooding is a relatively simple and cheap Enhanced oil recovery technique in which the salinity of the injected water is optimized (by desalination and/or modification) to improve oil recovery over conventional waterflooding. The presented study combines spontaneous imbibition, centrifuge method, unsteady state coreflooding and zeta potential experiments to investigate low-salinity effects in carbonate limestones samples.
Compared to Formation-water and Sea-water, Diluted-sea-water caused the significantly highest spontaneous oil recovery. Moreover, the imbibition capillary pressure curves are characterized by an increasing water-wetting tendency and a residual oil saturation reduction, as the salinity of the imbibing brines decreases in comparison to Formation-water. The unsteady state corefloodings resulted in the highest secondary oil recovery when Diluted-sea-water was used as injection water.
Based on the open-source C++ simulator Dumux, the study developed a numerical centrifuge and coreflooding model to history match the experimental data. The numerically derived capillary pressure and relative permeability data confirm a correlation between the system’s salinity, wettability, oil recovery and residual oil saturation.