Prediction of Asphaltene Precipitation During Solvent/CO2 Injection Conditions: A Comparative Study on Thermodynamic Micellization Model With a Different Characterization Approach and Solid Model
- Mohammad Tavakkoli (Sharif University of Technology) | Mohsen Masihi (Sharif University of Technology) | Mohammad H. Ghazanfari (Sharif University of Technology) | Riyaz Kharrat (Petroleum University of Technology)
- Document ID
- Society of Petroleum Engineers
- Journal of Canadian Petroleum Technology
- Publication Date
- March 2011
- Document Type
- Journal Paper
- 65 - 74
- 2011. Society of Petroleum Engineers
- 1.8 Formation Damage, 5.4 Enhanced Recovery, 5.4.2 Gas Injection Methods, 4.3.3 Aspaltenes, 5.4.7 Chemical Flooding Methods (e.g., Polymer, Solvent, Nitrogen, Immiscible CO2, Surfactant, Vapex)
- thermodynamic modelling, thermodynamic micellization Model with a Different Characterization approach, asphaltene precipitation, solid model
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- 660 since 2007
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There are different thermodynamic models that have been applied for modelling of asphaltene precipitation caused by various reasons, such as solvent/CO2 injection and pressure depletion. In this work, two computer codes based on two different asphaltene precipitation thermodynamic models--the first being the thermodynamic micellization model with a different characterization approach and the second being the solid model--have been developed and used for predicting asphaltene precipitation data reported in the literature as well as in the obtained data for Sarvak reservoir crude, which is one of the most potentially problematic Iranian heavy oil reserves under gas injection conditions. For the thermodynamic micellization model, a new approach was obtained by applying the characterization method taken from the thermodynamic solid model for oil component characterization. This new approach introduced a new matching parameter to the model, representing the interaction coefficients between asphaltene components and light hydrocarbon components, which resulted in a significant improvement in the thermodynamic micellization model predictions of asphaltene precipitation data under gas injection conditions. The model parameters obtained from a sensitivity analysis were applied in both thermodynamic models, and the experimental data of asphaltene precipitation were predicted. The asphaltene precipitation predictions from the solid model showed good agreement with the data taken under gas/solvent injection conditions. Especially for the trend of the titration curve after the peak point, reasonable agreements were observed which could rarely be found in the available literature. It has been observed that although the thermodynamic micellization model with a different characterization approach is more complex than the solid model, it is able to predict the trends of asphaltene precipitation curves for gas titration conditions reasonably well. Also, its predictions matched well with more experimental data points in comparison to the solid model predictions.
|File Size||1 MB||Number of Pages||10|
Burke, N.E., Hobbs, R.E., and Kashou, S.F. 1990. Measurement and Modeling ofAsphaltene Precipitation. J Pet Technol 42 (11):1440-1446; Trans., AIME, 289. SPE-18273-PA. doi:10.2118/18273-PA.
Chaback, J.J. 1991. Discussion of Measurement and Modeling of AsphaltenePrecipitation. J Pet Technol 43 (12): 1519-1520.
Danesh, A. 1998. PVT and Phase Behavior of Petroleum ReservoirFluids, first edition. London: Elsevier Science B.V.
Gupta, A.K. 1986. A Model for Asphaltene Flocculation Using an Equation ofState. MS thesis, University of Calgary, Calgary, Alberta, Canada.
Hirschberg, A. and Hermans, L. 1984. Characterization of Heavy Oils andPetroleum Residues. Paris: Editions Technip.
Li, Y.-K., Nghiem, L.X., and Siu, A. 1985. Phase Behaviour Computations forReservoir Fluids: Effect of Pseudo-Components on Phase Diagrams and SimulationResults. J Can Pet Technol 24 (6): 29-36. JCPT PaperNo. 85-06-02. doi: 10.2118/85-06-02.
Nghiem, L.X. and Coombe, D.A. 1997. Modeling Asphaltene Precipitationduring Primary Depletion. SPE J. 2 (2): 170-176.SPE-36106-PA. doi: 10.2118/36106-PA.
Nghiem, L.X., Hassam, M.S., Nutakki, R., and George, A.E.D. 1993. Efficient Modelling of AsphaltenePrecipitation. Paper SPE 26642 presented at the SPE Annual TechnicalConference and Exhibition, Houston, 3-6 October. doi: 10.2118/26642-MS.
Nghiem, L.X. 1999. Phase Behaviour Modelling and Compositional Simulation ofAsphaltene Deposition in Reservoirs. PhD dissertation, University of Alberta,Edmonton, Alberta, Canada.
Pan, H. and Firoozabadi, A. 1998. A Thermodynamic Micellization Modelfor Asphaltene Precipitation: Part I: Micellar Size and Growth. SPE Prod& Fac 13 (2): 118-127. SPE-36741-PA. doi:10.2118/36741-PA.
Sadeqi Moqadam, M. 2009. Experimental Investigation of AsphaltenePrecipitation Due to Pressure Depletion and CO2 Injection at ReservoirConditions. MS thesis, Petroleum University of Technology, Tehran, Iran.
Thomas, F.B., Bennion, D.B., Bennion, D.W., and Hunter, B.E. 1992. Experimental and Theoretical Studiesof Solids Precipitation from Reservoir Fluid. J Can Pet Technol 31 (1): 22-31. JCPT Paper No. 92-01-02. doi: 10.2118/92-01-02.
Victorov, A.I. and Smirnova, N.A. 1998. Thermodynamic Model of PetroleumFluids Containing Polydisperse Asphaltene Aggregates. Ind. Eng. Chem.Res. 37 (8): 3242-3251. doi: 10.1021/ie970869z.
Victorov, A.I. and Smirnova, N.A. 1999. Description ofasphaltene polydispersity and precipitation by means of thermodynamic model ofself-assembly. Fluid Phase Equilibria 158-160 (1):471-480. doi: 10.1016/S0378-3812(99)00053-9.
Victorov, A.I. and Firoozabadi, A. 1996. Thermodynamic micellizatin modelof asphaltene precipitation from petroleum fluids. AIChE Journal 42 (6): 1753-1764. doi: 10.1002/aic.690420626.