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This version (version 2) of the note applies to FrontSim 2002a_1 onward. For previous versions of FrontSim, please refer to the initial version of the note.
This note gives some guidance for converting existing Eclipse datasets to FrontSim.
FrontSim uses the same syntax as Eclipse, but supports only a subset of Eclipse keywords.
Outline Procedure
1.Study the notes below under Common Incompatibilities and Workarounds section by section. Implement those that are relevant to your dataset.
2.Remove the SCHDEULE section, and replace it with
TSTEP
1 /
END
3.Run the Eclipse dataset through FrontSim. Examine the PRT file. Look for a line beginning ‘Parsing data’. Following this will be a list of keywords which FrontSim has ignored. Note that many Eclipse keywords will not generate an error in FrontSim – they will simply be ignored if they are not supported. This may give a dataset than runs but gives the wrong answers, or a dataset that fails because required data is not given using a supported keyword: for example if you use GRAVITY, FrontSim will ignore it, but fail because no density values are supplied.
For example:
Parsing data...
Section GRID : PINCHOUT ignored
Section PROPS : RPTPROPS ignored
Parsing data finished.
4.Every keyword listed must be examined and its impact determined. Some, such as RPTPROPS, are not significant. Others may be important, for example PINCHOUT. For each ignored keyword, either find an equivalent – PINCH in this example, or remove it from the dataset. The notes below give some common workarounds. In addition, examine every error and warning message, and take action to eliminate them. This may be an iterative process: after an error, FrontSim will try to continue processing the dataset to check the rest of it, but some errors will stop FrontSim from proceeding, so when they are removed it may find more.
5.When you have no ignored keywords, error or warning messages, run the revised dataset through both FrontSim and Eclipse, still with no Schedule data. Compare the initial average pressure, and the fluids in place. For FrontSim, the initial pressure and fluids in place are given in the PRT file, and For Eclipse, the RPTSOL keyword must be used in the SOLUTION section to request an initial FIP (fluids in place) report in the PRT file. Eclipse & FrontSim should give almost identical results on the revised dataset – if not, check the respective PRT files for more warnings and errors.
6.Now compare the pressure and fluid in place to the original dataset: if your workarounds are successful, they should be similar. If they are not, you must consider the impact of each one and modify it until the comparison is acceptable.
7.Finally, include the SCHEDULE section data. As detailed below, this is likely to require a lot of work to convert. However, a schedule section that runs in FrontSim should run in Eclipse. |
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