1. Group 3/4

2. GullfaksVillage 2012 – Group 3 &4
IOR-challenge 1. Existing H1 model with faults and new production wells
1. Discuss geological factors that lead to the good communication Lower Brent Group of the H1 segment at Gullfaks. Make a base case simulation with the H1-model with existing wells. Additional perforations in the wells are possible.
2. The group shall make a simulation run where the transmissibility across all faults are set to zero.
3. Increase the number of wells to get an oil recovery similar to the base case.
4. Calculate the Net Present Value (NPV) of the additional wells in the case of reduced communication relative to the base case. Well cost is 200 MNOK and oil price fixed to 100 $/bbl. Use discount of 8%.

3. Lower Brent, segment H1 STOOIP in lower Brent is 20,3 MSm³ oil.
Lower Brent in H1 has ”only” 57 % recovery factor.
Potential MSm³ mobile oil left.
Relatively isolated segment.
A lot of data is collected in this area. It was the first production area and therefore a lot of good, initial data.
2 wells in lower Brent, A-35 (injector) and A-39A (producer).
2 producers in upper Brent, B-37(partly in LB) and A-38A.
Pressure communication between B-37 and lower Brent. No communication from A-35 to A-38A. 3 3

4. Faults in H1 segment GRID section
All faults are in Include file all_faults_ksaa191_1.flt
Include file consist of all faults for GF MF UB and LB choose only the faults in H1 LB area
Use keyword MULTFLT to modify the transmissibility across faults in H1
Simulate prediction case one more time with closed faults
Compare with previous prediction run

5. Well Recompletion and New wells
Wells can be recompleted and added in this exercise in Layers (LB)
SCHEDULE section
WELSPECS ‘NewWell’ ‘H1’ * ‘ OIL’ /
COMPDAT completion table
WCONINJE for injection wells
WCONPROD for producers
BHP limitation 310 bars for injection wells

6. Example COMPDAT -- WELL I J K1 K2 Sat. CF DIAM KH SKIN ND DIR Ro
'A-39A' 'OPEN' 1* * 'Y' /
'A-39A' 'OPEN' 1* * 'Y' /
'A-39A' 'OPEN' 1* * 'Y' /
'A-39A' 'OPEN' 1* * 'Y' /
'A-39A' 'OPEN' 1* * 'Y' /
'A-39A' 'OPEN' 1* * 'Y' /
'A-39A' 'OPEN' 1* * 'Y' /
'A-39A' 'OPEN' 1* * 'Y' /
'A-39A' 'OPEN' 1* * 'Y' /
'A-39A' 'OPEN' 1* * 'Y' /
'A-39A' 'OPEN' 1* * 'Y' /
'A-39A' 'OPEN' 1* * 'Y' /
'A-39A' 'OPEN' 1* * 'Y' /
'A-39A' 'SHUT' 1* * 'Y' /
'A-39A' 'SHUT' 1* * 'Y' /
'A-39A' 'SHUT' 1* * 'Y' /
'A-39A' 'OPEN' 1* * 'Y' / /

7. Presentation title
Presenters name
Presenters title
address
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