The fluid contacts are formed by the gravity and capillary pressure, which is the function of permeability and wettability.


Oil Water Contact (OWC)


Gas Oil Contact (GOC)

Gas Water Contact (GWC)


Free Water Level (FWL)


HC-Water Transition


Fig. 1. Fluid contact schematic: gas in yellow, oil in green, hydrocarbon-water transition in blue and free water in aqua.






References


https://www.spec2000.net/01-index.htm

http://web.mst.edu/~numbere/cp/chapter%203.htm

http://www.ux.uis.no/~s-skj/ipt/Proceedings/SCA.1987-2004/1-SCA1998-07.pdf

https://spiral.imperial.ac.uk/bitstream/10044/1/24363/2/Haddad-R-2011-Pet-Eng-MSc-thesis.pdf




SPE 71326, Saturation Height Methods and Their Impact on Volumetric Hydrocarbon in Place Estimates, B. Harrison (Enterprise Oil) and X.D. Jing (Imperial College, London), 2001 

А.Ф. Ямалетдинов, М.Н. Ханипов (ТатНИПИнефть) – Комплексный подход к созданию геолого-технологических моделей. Повышение качества моделирования.