Recently I investigate how our geologists has populated saturation property for gas reservoir that I trying to do history match. They does not involve nor capillary pressure coupled with phase permeabilities, nor notion of free water level. As far as I can see they extract saturation trend from log curves and performed deterministic interpolation in IRAP RMS using this trend. I think this is not good enough from point of view of reservoir physics and leads to problems in next steps of job. I decided to populate saturation property by myself. There are three approaches in international prctice to this problem:
1) using of saturation height function (SHF)
2) using of Leverett's J-function
3) using lambda-function
There is guideline SPE paper 107142-MS "Estimation of Saturation Height Function using Different Approaches". Please share this paper if you can. Also I will be greatly appreciated on any othe information on this topic.
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