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

[Shakespear]

Very very good notes on this are here

[link Point to another website Only the registered members can access]
(Good that we have such good people willing to share out there )

One things to remember about those curves is that the End Points will be used in the initialization process of the model's saturations. When putting together the DATA file for ECLIPSE you will need to specify contact(s) location depending on the phases in your model.

The lowest value in the SWOF table will be used to initialize the SW in the Gas Zone and Oil Zone. The highest value will be used in the aquifer (very often people fail to do this), which should be krw = 1 at Sw=1. Hence the straight line one might see in reports showing the rel perms for water.

In the transition zone the Capillary Pressure will be used. So the cap data from ow/go/ is used, from OWC and up, and GOC and up. Depending what phases you have in your model.

So this has an effect on your In Place calculations and is one source of error. The end points.

Ah, one more thing, your question about the "need to be equal". This refers to the fact that "whatever" value you have in the O-W Table first value for Kro, that same numeric value must be for Kro in the G-O Table rel perms. Draw a diagram and think about it, and it will be clear why. If you don't you will be confused. I am assuming you are using SWOF and SGOF key words.