| Popis: |
As part of the feasibility assessment for an improved oil recovery project on the Sahil reservoir in the United Arab Emirates, it was desired to assess the potential for asphaltene formation arising from the miscible contact of a rich hydrocarbon injection gas and the Sahil reservoir fluid. In this work, experimental data for the upper and lower asphaltene onset conditions over a temperature range from 110-255 °F were measured for the reservoir fluid. In addition, three injection gas mixtures (15, 45, & 60 mole%) were also evaluated at the reservoir temperature of 255°F. The experimental data were measured using a Near Infrared (NIR) light scattering technique. Subsequently, the experimental data was used to tune an equation-of-state (EOS) based model that represents the asphaltene phase as pseudo pure component solid. Results of the work demonstrated a significant effect of temperature and injection gas concentration on the asphaltene onset conditions for the reservoir fluid. It was also shown that the chosen model could accurately represent the measured behavior of the fluids over the range of conditions tested. |
