Page 229 - Well Logging and Formation Evaluation

Solutions to Exercises 219

1. GR sa = 20, GR sh = 90
2. Calculate V sh according to V sh = (GR - GR sa )/(GR sh - GR sa )
3. OWC at 646m
4. Assume a fluid density of 1.0g/cc in the water leg and 0.9 in the oil leg.
7. R w = 0.02ohm
9. OWC at 646m

11.
Zone Top (m) Base (m) Gross (m) Net (m) Av. Por. (m) S w

Zone 1 616 622.5 6.5 0
Zone 2 oil 622.5 646 23.5 21.5 0.108 0.509
Zone 2 water 646 655.5 9.5 9.5 0.124 0.937
Zone 3 water 655.5 675 19.5 1.52 0.05 0.767

12. Suggested stations for pretest measurements are:
1. 624m reference density log
2. 630
3. 636
4. 642
5. 646
6. 649
7. 652.5
8. 662

If the oil type is unknown, it is recommended to take a sample at
630m using a pump-out module to avoid contamination with WBM.