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Abstract
Reservoir oil properties are usually measured at reservoir temperature and are estimated at other temperature using empirical correlations. Fluid properties correlations cannot be used globally because of different characteristics of fluids in each area. Here, based on Iranian oil PVT data, new correlations have been developed to predict saturation pressure and oil formation volume factor at bubble point pressure. Validity and accuracy of these correlations were confirmed by comparing results of these correlations with experimental data. Checking the results shows that results for Iranian oil properties in this work are in good agreement with experimental data respect to other correlations.
NOMENCLATURE
| Bob | = | Oil FVF at bubble point pressure, vol/vol |
| P | = | Pressure,kPa |
| Pb | = | Bubble point pressure, kPa |
| Rs | = | Solution gas/oil ratio, SCF/STB, vol/vol |
| T | = | Temperature, °C |
| °API | = | Stock tank oil gravity |
| γg | = | Gas relative density (air = 1) |
| γo | = | Oil relative density (water = 1) |
| Ei | = | Percent relative error |
| Eave | = | Average absolute percent relative error |
| Ea | = | Average percent relative error |
| S | = | Standard deviation |
| Nd | = | Number of data points |
| OFVF | = | Oil formation volume factor |
Si Metric Conversion Factors