The contact surfaces in reservoir between hydorcarbon and water phases, forming segregating fluids with different densities (normally between gas, oil and water) formed by gravity and capillary pressure.
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Free Water Level (FWL) |
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HC-Water Transition |
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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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Petroleum Industry / Upstream / Subsurface E&P Disciplines / Petrophysics
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