| Case Name | Case Desciption | Base Model | Results Match |
Comments |
|---|---|---|---|---|
| WVFPEXP-01 | Base tartan anticline model with WVFPEXP default values. | WVFPEXP | No | Results similar to E100, except previously we had early shut-in and incorrect well control modes, now we we have longer production and still have incorrect well control modes. |
| WVFPEXP-02 | WVFPEXP(CONTROL) set to YES2 | WVFPEXP | Yes | Results are effectively identical to E100. |
| WVFPEXP-03 | Gas lift optimization. | WVFPEXP | No | Results similar to E100 for the first 18 months or so, thereafter OPM Flow allows some wells to flow longer, |
| WVFPEXP-04 | WVFPEXP(CONTROL) set to YES2 and gas lift optimization. | WVFPEXP | No | Results are different due to OPM Flow does not shut-in wells, and the well control modes are inconsistent. |
| WVFPEXP-05 | Modified Base model with WVFPEXP default values. | WVFPEXP | Yes | No difference in results, but OPM Flow does not calculate SBHP. Robust bhp(thp) failures is 25. |
| WVFPEXP-06 | Modified Base model with WVFPEXP(IMPEXP) set to EXP. | WVFPEXP | Yes | No difference in results, but OPM Flow does not calculate SBHP. Robust bhp(thp) failures is 32 very similar WVFPEXP-06. Expected Less Warnings with WVFPEXP(IMPEXP)=EXP |
General Comments:
- Even if WVFPEXP(CONTROL)=YES, if the well cannot flow at the calculated rate it should be SHUT/STOPPED. To be clear, the well is allowed to die if the IPR does not intersect the VFP curve at the constrained rate.
- BHP is not reported when the well is not flowing.
- In general well control modes are inconsistent with commercial simulator.
- Gas lift cases all have too much gas allocated at the start that creates numerical issues.
- OPM Flow needs a warning message stating that the well VFP table lookup has changed to explicit to prevent premature closing.
Notes:
- Results Match column indicate if the OPM Flow results match the commercial simulator.
- All cases run with five day time steps for comparison purposes.
- See the WVFPEXP.odp document for comparisons plots.
Version: 14 September 2022
