Saturation

Question 1

How are saturation height functions determined?

Answer 1

• cap curves

- log-derived saturations

Question 2

What is a saturation model?

Answer 2

An expression providing Sw as a function of Pc (or h) and permeability and/or porosity

Question 3

What are the advantages of modelling in normalized PC (PC_IFT1)?

Answer 3

• Independent of lab method/fluid (of measuring Pc_lab)

- Independent of reservoir fluid system

Question 4

What are the buildup steps of a saturation model?

Answer 4

1) Select base function (Lambda, Brooks-Corey or Thomeer)
2) Convert PC_lab to PC_IFT1
3) Fit the capcurve
4) Get 3 fitting parameters and plot each against perm, por and sqrt(perm/por)
5) Substitute trends back into the base function

Question 5

What is the preferred base function to fit cap curve and what are the three parameters in that function?

Answer 5

Brooks-Corey

• Swirr
• Pce
• n (describes shape of transition zone)