High-Pressure Data and Modeling Results for Phase Behavior and Asphaltene Onsets of Gulf of Mexico Oil Mixed With Nitrogen
- Odd Steve Hustad (Statoil ASA/NTNU) | Na Jia (Schlumberger DBR Technology Center) | Karen Schou Pedersen (Calsep A/S) | Afzal Memon (Schlumberger) | Sukit Leekumjorn (Calsep Inc.)
- Document ID
- Society of Petroleum Engineers
- SPE Reservoir Evaluation & Engineering
- Publication Date
- August 2014
- Document Type
- Journal Paper
- 384 - 395
- 2014.Society of Petroleum Engineers
- 5.2.2 Fluid Modeling, Equations of State, 5.2 Reservoir Fluid Dynamics, 4.3.3 Aspaltenes, 5.2.1 Phase Behavior and PVT Measurements, 1.8 Formation Damage, 5.4.10 Microbial Methods
- phase properties, asphaltene, phase envelope
- 1 in the last 30 days
- 551 since 2007
- Show more detail
- View rights & permissions
|SPE Member Price:||USD 5.00|
|SPE Non-Member Price:||USD 35.00|
This paper presents fluid composition, high-pressure pressure/volume/temperature (PVT) measurements, and equation-of-state (EoS) modeling results for a recombined Tahiti oil, Gulf of Mexico (GoM), and for the oil mixed with nitrogen in various concentrations. The data include: - Upper and lower asphaltene onset pressures and bubblepoint pressures for the reservoir fluid swelled with nitrogen. At the reservoir conditions of 94 MPa (13,634 psia) and 94°C (201.2°F), asphaltene precipitation is seen after the addition of 27 mol% of nitrogen. - Viscosity data for the swelled fluids showing that the addition of nitrogen significantly reduces the oil viscosity. - Slimtube runs indicating that the minimum miscibility pressure (MMP) of the oil with nitrogen is significantly higher than estimated from published correlations. The data were modeled with the volume-corrected Soave-Redlich- Kwong (SRK) EoS and the perturbed-chain statistical association fluid theory (PC-SAFT) EoS. Although both equations provide a good match of the PVT properties of the reservoir fluid, PC-SAFT is superior to the SRK EoS for simulating the upper asphaltene onset pressures and the liquid-phase compressibility of the reservoir fluid swelled with nitrogen. Nitrogen-gas flooding is expected to have a positive impact on oil recovery because of its favorable oil-viscosity-reduction and phase behavior effects.
|File Size||1 MB||Number of Pages||12|
Buckley, J.S., Wang, J., and Creek, J.L. 2007. Solubility of the Least-Soluble Asphaltenes. In Asphaltenes, Heavy Oil, and Petroleomics, ed. O.C. Mullins, E.Y. Sheu, A. Hammami, and A.G. Marshall, New York: Springer.
Glasø, Ø. 1990. Miscible Displacement: Recovery Test With Nitrogen. SPE Res Eval & Eng 5 (1): 61–68. SPE-17378-PA. http://dx.doi.org/10.2118/17378-PA.
Gonzalez, D.L., Mahmoodaghdam, E., Lim, F. et al. 2012. Effects of Gas Additions to Deepwater Gulf of Mexico Reservoir Oil: Experimental Investigation of Asphaltene Precipitation and Deposition. Presented at the SPE Annual Technical Conference and Exhibition, San Antonio, Texas, 8–10 October. SPE-159098-MS. http://dx.doi.org/10.2118/159098-MS.
Grecco, M. 2007. DeepStar: 15 Years of Collaboration Between Contractors, Academia, and the Oil Companies on Technology for Deep Water. Presented at the Offshore Technology Conference, Houston, Texas, 30 April–3 May. OTC-11511-MS. http://dx.doi.org/10.4043/11511-MS.
Gross, J. and Sadowski, G. 2001. Perturbed-Chain SAFT: An Equation of State Based on a Perturbation Theory for Chain Molecules. Ind. Eng. Chem. Res. 40 (4): 1244–1260. http://dx.doi.org/10.1021/ie0003887.
Hanssen, J.E. 1988. Nitrogen as a Low-Cost Replacement for Natural Gas Reinjection Offshore. Presented at the SPE Gas Technology Symposium, Dallas, Texas, 13–15 June. SPE-17709-MS. http://dx.doi.org/10.2118/17709-MS.
Hudgins, D.A., Llave, F.M., and Chung, F.T.H. 1990. Nitrogen Miscible Displacement of Light Crude Oil: A Laboratory Study. SPE Res Eval & Eng 5 (1): 100–106. SPE-17372-PA. http://dx.doi.org/10.2118/17372-PA.
Jamaluddin, A., Creek, J., Kabir, C. et al. 2002a. Laboratory Techniques to Measure Thermodynamic Asphaltene Instability. J Can Pet Technol 41 (7): 44–52. SPE-01-07-04-PA. http://dx.doi.org/10.2118/01-07-04-PA.
Jamaluddin, A.K.M., Joshi, N., Iwere, F. et al. 2002b. An Investigation of Asphaltene Instability Under Nitrogen Injection. Presented at the SPE International Petroleum Conference and Exhibition, Villahermosa, Mexico, 10–12 February. SPE-74393-MS. http://dx.doi.org/10.2118/74393-MS.
Katz, D.L. and Firoozabadi, A. 1978. Predicting Phase Behavior of Condensate/Crude-Oil Systems Using Methane Interaction Coefficients. J Pet Technol 30 (11): 1649–1655. SPE-6721-PA. http://dx.doi.org/10.2118/6721-PA.
Lim, F., Munoz, E., and Joshi, N.B. 2008. Design and Initial Results of EOR and Flow Assurance Laboratory Fluid Testing for K2 Field Development in the Deepwater Gulf of Mexico. Presented at the Offshore Technology Conference, Houston, Texas, 5–8 May. OTC-19624. http://dx.doi.org/10.4043/19624-MS.
Mazerov, K. 2012. HPHT Research Heats Up. Drilling Contractor (July/August).
Memon, A., Qassim, B., Al-ajmi, M.F. et al. 2012. Miscible Gas Injection and Asphaltene Flow Assurance Fluid Characterization: A Laboratory Case Study for Black Oil Reservoir. Presented at the SPE EOR Conference of Oil and Gas West Asia, Muscat, Oman, 16–18 April. SPE-150938-MS. http://dx.doi.org/10.2118/150938-MS.
Michelsen, M.L. 1982a. The Isothermal Flash Problem. Part I. Stability. Fluid Phase Equilibria 9 (1): 1–19. http://dx.doi.org/10.1016/0378-3812(82)85001-2.
Michelsen, M.L. 1982b. The Isothermal Flash Problem. Part II. Phase Split Calculation. Fluid Phase Equilibria 9 (1): 21–40. http://dx.doi.org/10.1016/0378-3812(82)85002-4.
Mullins, O.C., Sheu, E.Y., Hammami, A. et al. 2007. Precipitation and Deposition of Asphaltenes in Production Systems: A Flow Assurance Overview. Chapter 23 in Asphaltenes, Heavy Oils and Petroleomics, New York: Springer.
Nighswander, J.A., Chang-Yen, D.A., Perez, J. et al. 1994. Experimental Measurement and Modelling of Transition Zone Fluids. Presented at the SPE/DOE Ninth Symposium on Improved Oil Recovery, Tulsa, Oklahoma, 17–20 April. SPE-27813-MS. http://dx.doi.org/10.2118/27813-MS.
Pedersen, K.S., Blilie, A.L., and Meisingset, K.K. 1992. PVT-Calculations on Petroleum Reservoir Fluids Using Measured and Estimated Compositional Data for the Plus-Fraction. Ind. Eng. Chem. Res. 31: 1378.
Pedersen, K.S. and Christensen, P.L. 2007. Phase Behavior of Petroleum Reservoir Fluids. Boca Raton, Florida: CRC Press, Taylor & Francis Group. ISBN 0-8247-0694-3.
Pedersen, K.S., Leekumjorn, S., Krejbjerg, K. et al. 2012. Modeling of EOR PVT Data Using PC-SAFT Equation. Presented at the Abu Dhabi International Petroleum Exhibition and Conference, Abu Dhabi, UAE, 11–14 November. SPE-162346-MS. http://dx.doi.org/10.2118/162346-MS.
Peneloux, A., Rauzy, E., and Fréze, R. 1982. A Consistent Correction for Redlich-Kwong-Soave Volumes. Fluid Phase Equilibria 8 (7).
Sebastian, H.M. and Lawrence, D.D. 1992. Nitrogen Minimum Miscibility Pressure. Presented at the SPE/DOE Eighth Symposium on Enhanced Oil Recovery, Tulsa, Oklahoma, 22–24 April. SPE-24134-MS. http://dx.doi.org/10.2118/24134-MS.
Soave, G. 1972. Equilibrium Constants From a Modified Redlich-Kwong Equation of State. Chem. Eng. Sci. 27 (6): 1197–1203.
Srivastava, R.K., Huang, S.S., and Dong, M. 1999. Asphaltene Deposition During CO2 Flooding. SPE Prod Fac 14 (4): 235–245. SPE-59092-PA. http://dx.doi.org/10.2118/59092-PA.