Kr data input in ECLIPSE and discussion about oi/wat and gas/oil kr.

[vinomarky]

So my first question (finally) is: What would happen if I use saturation tables with ko @ swir as a reference? Will ECLIPSE automatically recognize that those sat tables are written that way and will provide the same results as if absolute perm was used*? *using ko @ swir as a reference requires knowledge of Ko @ swir (mD units), is it possible to input such data in eclipse?

You can put in rel perm curves relative to Kair, Kklinkenberg, Ko (@Swir) or any other reference AS LONG AS YOUR PERM IS APPROPRIATELY DEFINED. Eclipse does not require any of the endpoints to be equal to 1, so it will simply take the relative perm it gets from the lookup table given a block water saturation and multiple that number by the block perm as defined. So, if you wish to define Kro(max) as = 1 (ie normalize), then you should ensure that all your perms are appropriately reduced to a values in line with the permeability to oil at residual water saturation. Conversely, if you wish to define your perm grid in absolute (Kair) perm, then you need to ensure your Kro(max) and Krw(max) are appropriately reduced to something less than unity.

2. Second question: Let's say a reservoir has oil/water (vs water saturation) and gas/oil (vs liquid saturation, i.e water plus oil) kr data measured at EXACTLY the same depth (same plug), however, lab results show that Kro @ Swir is different in both tests (this value is provided by the lab), what's the reason ??

Many reasons. If it is the same core plug, then you are probably seeing a mixture of hysteresis and/or cleaning/handling artifacts - the more you delve into the details of SCAL testing & core cleaning/handling issues, the more you understand the breadth of uncertainty that you are dealing with....

furthermore, using absolute perm as a reference, should oil endpoint (i.e. kro max) in both saturation tables (oil/wat and gas/oil) be the same as ECLIPSE requieres??

See above - Eclipse does not require endpoints to be equal to 1