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

Format:

Book

Author/Creator:

Feldmann, Felix, author.

Language:

English

Subjects (All):

Oil saturation in reservoirs.

Physical Description:

1 online resource (255 pages)

Place of Publication:

Göttingen : Cuvillier Verlag, [2020]

Summary:

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.

Notes:

Description based on print version record.

Includes bibliographical references.

ISBN:

9783736961760

3736961766