N Ah 1 S wc o / Boi
2 Interstitial water and residual oil
2.2 Residual oil saturation
(1) Residual oil
The residual oil refers to the oil remained in the pores of the swept part of the reservoir
Section 2.4 Fluid saturation
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Contents
• Fluid
saturation
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3 Methods of determining fluid saturation
Solution: The original oil in place (OOIP) is N:
[14.4 106 10 0.2 1 0.3] 0.86 / 1.2 1.44 107 t
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Sgi+Swc=1.0
Soi + Swc = 1.0 Sw = 1.0
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Connate water saturation
The ratio of the volume of connate water to the pore volume is called the connate water saturation or interstitial water saturation or irreducible water saturation