The contact surfaces in reservoir segregating fluids with different densities (normally between gas, oil and water) formed by gravity and capillary pressure.
Free Water Level (FWL)| Excerpt Include |
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| Free Water Level (FWL) | Free Water Level (FWL) |
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Oil Water Contact (OWC)
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| Oil Water Contact (= OWC) |
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HC-Water TransitionGas Oil Contact (GOC)
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Gas Oil Water Contact (GOCGWC) | | Excerpt Include |
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| Gas Oil Water Contact (GOCGWC) |
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Free Water | Contact Level ( | GWCFWL) | | Gas | Contact | GWC | Gas | Contact | GWC | |
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| Fig. 1. Fluid contact schematic: gas in yellow, oil in green, hydrocarbon-water transition in blue and free water in aqua. |
Usually the fluid contacts are relatively flat but varying reservoir properties may lead to inclination of the contact surface.
The exact knowledge of fluid contacts is critical in reserves estimation and field development planning.
See Also
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Geology / Petroleum Geology
Petroleum Industry / Upstream / Subsurface E&P Disciplines / Petrophysics
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