Method to determine drift and residual oil saturation

Details Method to determine drift and residual oil saturation Method to determine drift and residual oil saturation

1991-07-31

1993-05-18

Housel, James C.

Chemistry: analytical and immunological testing

Geochemical, geological, or geothermal exploration

Using chemical tracers

73155, 166250, 166252, 436 30, 436 56, 436161, G01N 3324, E21B 4710

Patent

active

052120937

ABSTRACT:
Drift or residual oil saturation within a reservoir around a wellbore is determined by injection of a water-soluble tracer and then producing from the well. This injection is performed twice. The first injection is immediately followed by production in order to create a baseline. The second injection is followed by a soak period, and then production. Production of the tracers is compared to determine drift or residual oil saturation within the reservoir.

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patent: 3847548 (1974-11-01), Keller et al.
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patent: 4782899 (1988-11-01), Richardson
Tomich et al., "Single-Well Tracer Method to Measure Residual Oil Saturation", J. Petroleum Technology, 1973, 25, 211-218.
C. Q. Sheely, "Description of Field Tests to Determine Residual Oil Saturation by Single-Well Tracer Method", J. Petroleum Technology, 1978, 30, 194-202.

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