In Situ Phase Pressures and Fluid Saturation Dynamics Measured in Waterfloods at Various Wettability Conditions
- Amund Brautaset (University of Bergen) | Geir Ersland (University of Bergen) | Arne Graue (University of Bergen)
- Document ID
- Society of Petroleum Engineers
- SPE Reservoir Evaluation & Engineering
- Publication Date
- June 2010
- Document Type
- Journal Paper
- 465 - 472
- 2010. Society of Petroleum Engineers
- 4.1.2 Separation and Treating, 5.2.1 Phase Behavior and PVT Measurements, 5.3.2 Multiphase Flow, 5.6.5 Tracers, 4.1.5 Processing Equipment, 1.6.9 Coring, Fishing, 5.3.1 Flow in Porous Media, 5.4.1 Waterflooding, 4.3.1 Hydrates, 5.4.2 Gas Injection Methods, 5.7.2 Recovery Factors
- MRI, wettability, in situ phase pressures, fluid saturation dynamics
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- 648 since 2007
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During waterfloods of six outcrop chalk core-plug samples prepared at various wettabilities, simultaneous local pressures and in-situ fluid saturations were measured. Using high-spatial-resolution magnetic resonance imaging (MRI) to image fluid saturations and pressure taps with semipermeable disks to measure individual phase pressures allowed calculations of relative permeabilities and the dynamic capillary pressure curves for the imbibition processes. A second objective was to identify individual-fluid saturation changes caused by spontaneous imbibition and viscous displacement to determine the local recovery mechanism and to calculate local recovery factors and in-situ Amott-Harvey indices. The obtained results contribute to improved description and understanding of multiphase-fluid flow in porous media, including in situ measurements of relative permeabilities, dynamic capillary pressure curves, Amott-Harvey Indices,and local oil-recovery mechanisms.
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