The Skelt _Harrison Method to dervive SW Height Functions

[rickykumasi@gmail.com]

Hi, experts
I was hoping if someone can shed some light on the variables a,b,c,d, (h or Pc) in the skelt_Harrison Equation:

Sw=a.exp(-b/h+d)^c

Any help forming some understanding of this method would be really good.

Thanks
EK

[JUANPE]

The Problem of initializing a simulation model using a representative water saturation distribution is becoming widely
recognized. The Middle East has two thirds of all recoverable oil in the world. With most Middle Eastern reservoirs being
largely extensive carbonates and low permeable sandstone, the capillary pressure plays an important role in water saturation
modeling.
Shehadeh (Shehadeh K. Masalmeh 2000) attempts to describe the mobility of oil in the transition zone and relates it
to the initial oil saturation distribution. It is found that as the initial oil saturation gets close to the residual,
the mobility increases. This implies that the mobility of oil in the transition zone is possibly higher than anywhere else in the reservoir.
The saturations can be estimated accurately and utilized in the computer model. Many papers have been published on the water saturation heights
and their impact on the hydrocarbon in place such as Harrison(B.Harrison 2001) and Wiltgen (Nick A. Wiltgen 2003)
which compares the saturation heights predicted water saturations against the log water saturations.
Harrison(B.Harrison 2001) predicts that Cuddy’s log based method is the simplest most effective method to use;
Wiltgen (Nick A. Wiltgen 2003) concludes that the Skelt and Harrison method gave the best result.

Each oil field is different, with many different reservoir features and behavior.
It is recommended that the approach taken in the study may be followed by a sensitivity analysis.
This one may be performed on the capillary pressure as well as other parameters when a good match is required.

See this article:

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