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Magnetic resonance imaging study on near miscible supercritical CO2 flooding in porous media
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10.1063/1.4803663
/content/aip/journal/pof2/25/5/10.1063/1.4803663
http://aip.metastore.ingenta.com/content/aip/journal/pof2/25/5/10.1063/1.4803663

Figures

Image of FIG. 1.
FIG. 1.

Schematic diagram of the experimental setup.

Image of FIG. 2.
FIG. 2.

Sketch of the effective field of view (eFOV) in the MRI images.

Image of FIG. 3.
FIG. 3.

MRI images of CO flooding in the porous media at 37.8 °C and the rate of 0.10 ml/min (7.54 ft/day) under (a) 0.950 MMP (7.40 MPa); (b) 0.964 MMP (7.51 MPa); (c) 0.982 MMP (7.65 MPa); (d) 1.004 MMP (7.82 MPa); (e) 1.014 MMP (7.90 MPa) with time interval of 256 s (4.27 min) between two images.

Image of FIG. 4.
FIG. 4.

Images of oil saturation in the porous media at 37.8 °C and the rate of 0.10 ml/min (7.54 ft/day) under (a) 0.950 MMP (7.40 MPa); (b) 0.964 MMP (7.51 MPa); (c) 0.982 MMP (7.65 MPa); (d) 1.004 MMP (7.82 MPa); (e) 1.014 MMP (7.90 MPa) with time interval of 256 s (4.27 min) between two images.

Image of FIG. 5.
FIG. 5.

Evolution of the oil saturation in the porous media under pressures around MMP at 37.8 °C and the rate of 0.10 ml/min (7.54 ft/day).

Image of FIG. 6.
FIG. 6.

Images of oil saturation in the porous media at 37.8 °C and the rate of 0.05 ml/min (3.77 ft/day) under (a) 0.936 MMP (7.29 MPa); (b) 0.967 MMP (7.53 MPa); (c) 1.028 MMP (8.01 MPa) with time interval of 256 s (4.27 min) between two images.

Image of FIG. 7.
FIG. 7.

Images of oil saturation in the porous media at 37.8 °C and the rate of 0.15 ml/min (11.3 ft/day) under (a) 0.956 MMP (7.45 MPa); (b) 0.981 MMP (7.64 MPa); (c) 0.997 MMP (7.77 MPa); (d) 1.021 MMP (7.95 MPa); (e) 1.035 MMP (8.06 MPa) with time interval of 256 s (4.27 min) between two images.

Image of FIG. 8.
FIG. 8.

Evolutions of the oil saturation in the porous media vs PV under pressures around MMP at 37.8 °C and the rates of 0.05 ml/min (3.77 ft/day), 0.10 ml/min (7.54 ft/day), and 0.15 ml/min (11.3 ft/day).

Image of FIG. 9.
FIG. 9.

Linear intervals of the evolution of the oil saturation at the injection rates of 0.05 ml/min (3.77 ft/day), 0.1 ml/min (7.54 ft/day), and 0.15 ml/min (11.3 ft/day) under the pressure about (a) 7.5 MPa; (b) 8.0 MPa vs PV.

Image of FIG. 10.
FIG. 10.

Ratio of transition zone velocity over “volumetric velocity” as a function of pressure.

Image of FIG. 11.
FIG. 11.

Oil recovery of CO flooding in the porous media at 5 PV and 37.8 °C.

Image of FIG. 12.
FIG. 12.

An example of thresholds chosen of the transition zone, from lower limit to upper limit, at the rate of 0.10 ml/min under 1.004 MMP at 1.19 PV.

Image of FIG. 13.
FIG. 13.

Evolution of the ratio of the transition zone area ( ) and the eFOV area ( ) against PV.

Image of FIG. 14.
FIG. 14.

Maximum of the ratio of the transition zone area over the eFOV area under pressure around MMP at the rates of 0.05 ml/min (3.77 ft/day), 0.10 ml/min (7.54 ft/day), and 0.15 ml/min (11.3 ft/day).

Tables

Generic image for table
Table I.

Viscosities and densities of CO and -decane and the recovery at 5 PV in the near miscible region, the temperature was 37.8 °C.

Generic image for table
Table II.

Velocities of the “volumetric front” and the transition zone in each individual condition.

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/content/aip/journal/pof2/25/5/10.1063/1.4803663
2013-05-07
2014-04-24
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Magnetic resonance imaging study on near miscible supercritical CO2 flooding in porous media
http://aip.metastore.ingenta.com/content/aip/journal/pof2/25/5/10.1063/1.4803663
10.1063/1.4803663
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