Abstract
Asphaltene can precipitate in oil reservoirs as a result of natural depletion and/or gas injection crippling the oil production performance. Most of the conventional models for asphaltene precipitation cannot precisely capture the asphaltene precipitation at a wide pressure range and for different oil types. To have a precise model that can be used for various oil types at a wide range of pressure conditions, a comprehensive artificial neural network (ANN) model was proposed to estimate the weight percent of precipitated asphaltene in different oil types (three oil types, namely light, medium and heavy). The dilution ratio, pressure, molecular weight of solvent, API gravity and resin-to-asphaltene ratio were considered as the model input parameters. The oil samples were thus categorized based on the differences in their API gravity and resin-to-asphaltene ratio. Five hundred and fifty experimental precipitation datapoints were obtained from our experimental apparatus in a wide range of pressure, dilution ratio and injected fluid molecular weight, and used to make a comprehensive databank for model calibration and verification. At the test stage, the coefficient of correlation (R 2) was higher than 0.98 and mean square error was less than 0.04 indicating the good performance of the proposed model. Furthermore, a comparison between the prediction of ANN model and two types of alternative approaches, namely the thermodynamic and the fractal/aggregation approaches, was performed. For this purpose, the prediction of two of the widely used solubility models, Flory–Huggins and Modified Flory–Huggins and also a polydisperse thermodynamic model was compared to the prediction of the proposed ANN model. In addition to those, as a fractal/aggregation model, a scaling model was also selected and employed to compare its performance against that of the proposed ANN model. The ANN model showed a better performance as compared to the other conventional models. The results demonstrated that the proposed model provides acceptable prediction for different oil types over a wide range of pressure which is a difficult task for most of the conventional techniques.
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Abbreviations
- ANN:
-
Artificial neural network
- API:
-
Artificial neural network
- BBN:
-
Bayesian belief network
- CCD:
-
Charge-coupled device
- FH:
-
Flory–Huggins
- LSSVM:
-
Least square support vector machine
- LSSVR:
-
Least square support vector regression
- EOR:
-
Enhanced oil recovery
- MFH:
-
Modified Flory–Huggins
- MLP:
-
Multilayer perceptron
- MSE:
-
Mean squared error
- SAFT:
-
Statistical associating fluid theory
- SARA:
-
Saturate, aromatic, resin, asphaltene
- VAPEX:
-
Vapor extraction process
- R 2 :
-
Determination coefficient
- \( \varphi_{\text{A}}^{\text{l}} \) :
-
Volume fraction of asphaltene, solvent molar volume, molar volume of asphaltene, and
- \( V_{\text{MB}} \) :
-
Solvent molar volume
- \( V_{\text{A}} \) :
-
Molar volume of asphaltene
- \( \delta_{\text{A}} \) :
-
Solubility parameter of asphaltene
- \( \delta_{\text{B}} \) :
-
Solubility parameter of solvent
- \( \lambda_{12} \) :
-
Residual term
- Z :
-
Coordinate number in Eq. (2)
- N :
-
Number of segment
- \( \overline{{M}}_{\text{A}} \) :
-
Average molecular weight
- M w :
-
Molecular weight (g/mol)
- x :
-
Variable in Eq. (5)
- y :
-
Variable in Eq. (6)
- X :
-
Variable in Eq. (7)
- Y :
-
Variable in Eq. (8)
- A :
-
Coefficient of Eq. (9)
- Z :
-
Adjustable parameter in Eq. (5)
- \( Z^{{\prime }} \) :
-
Universal constant in Eq. (6)
- P :
-
Pressure (psi)
- R :
-
Dilution ratio (cm3 of diluents/g of oil)
- wt:
-
Asphaltene precipitation
- C :
- Z j :
-
Net input to jth neuron
- x i :
-
The input units
- w ij :
-
Weights representing the connection between the ith input and jth neuron
- n :
-
Number of input units
- b j :
-
Bias associated with jth neuron
- R :
-
Regression
- N :
- k exp :
-
Experimental amount
- K predict :
-
Predicted amount
References
Leontaritis KJ, Mansoori GA (1988) Asphaltene deposition: a survey of field experience and research approaches. J Petrol Sci Eng 1:229–239
Speight JG (1990) Fuel science and technology handbook. Marcel Dekker, New York
Fazlali A, Hosseini M, Khosrobeigi E (2007) New thermodynamic modified Flory–Huggins model for prediction of asphaltene precipitation in crude oil. In: International conference on mining, materials and petroleum engineering, Phuket, Thailand
Latif HA, Khalid AAl-Gh (1981) Investigations into asphaltenes in heavy crude oils. I. Effect of temperature on precipitation by alkane solvents. Fuel 60:1043–1046
Speight JG, Long RG (1984) Trowbridge TD Factors influencing the separation of asphaltenes from heavy petroleum feedstocks. Fuel 63:616–620
Alizadeh A, Nakhli H, Kharrat RM, Ghazanfari H (2011) An experimental investigation of asphaltene precipitation during natural production of heavy and light oil reservoirs: the role of pressure and temperature. Pet Sci Technol 29(10):1054–1065
de Boer RB, Leerlooyer K, Eigner MRP, Mij BV, van Bergen ARD (1995) Screening of crude oils for asphalt precipitation: theory, practice, and the selection of inhibitors. SPE Prod Facil 10(1):55–61
Zendehboudi S, Shafiei A, Bahadori A, Jamesa LA, Elkameld A, Lohi A (2014) Asphaltene precipitation and deposition in oil reservoirs–technical aspects, experimental and hybrid neural network predictive tools. Chem Eng Res Design 92(5):857–875
Jamaluddin AKM, Creek J, Kabir CS, Mcfadden JD, D’cruz D, Manakalathil J, Joshi N, Ross B (2002) Laboratory techniques to measure thermodynamic asphaltene instability. J Can Pet Tech 41:44–52
Akbarzadeh K, Hammami A, Kharrat A, Zhang D, Allenson S, Creek J, Kabir S, Jamaluddin A, Marshall AG, Rodgers RP, Mullins OC, Solbakken T (2007) Asphaltenes–Problematic but rich in potential. Oilfield Rev 19(2):22–43
Yen A, Yin YR, Asomaning S (2001). Evaluating asphaltene inhibitors: laboratory tests and field studies. In: Paper SPE # 65376-MS presented at the SPE international symposium oilfield chemistry 2001, Houston, Texas
Abdallah D, Al-Basry A, Zwolle Z, Grutters M, Huo Z, Stankiewicz A (2010). Asphaltene studies in on-shore Abu Dhabi oil fields. PART II: Investigation and mitigation of asphaltene deposition—A case study. In: Paper SPE # 138039-MS presented at the Abu Dhabi international petroleum exhibition and conference, 1–4 November 2010, Abu Dhabi, UAE
Chamkalani A, Amani M, Kiani M, Chamkalani R (2013) Assessment of asphaltene deposition due to titration technique. Fluid Phase Equilib 339:72–80
Akbarzadeh K, Ayatollahi S, Moshfeghian M, Alboudwarej H, Yarranton HW (2004) Estimation of SARA fraction properties using the SRK EOS. J Can Pet Technol 43(9):31–39
Greaves M, Xia TX (2004) Downhole catalytic process for upgrading heavy oil: produced oil properties and composition. J Can Technol 43:25–30
de Boer RB, Leerlooyer K, Eigner MRP, van Bergen ARD (1995) Screening of crude oils for asphalt precipitation: theory, practice, and the selection of inhibitors. SPE Prod Facil 10:55–61
Nghiem LX (1990) Phase behavior modeling and compositional simulation of asphaltene deposition in reservoirs. Dissertation, Department of Civil and Environmental Engineering, University of Calgary, Calgary, Alberta, Canada
Hirschberg A, DeJong LNJ, Schipper BA, Meijer JG (1984) Influence of temperature and pressure on Asphaltene Flocculation. Soc Petrol Eng 24:283–291
Burke NE, Hobbs RE, Kashou SF (1990) Measurement and modeling of asphaltene precipitation. J Petrol Technol 12:1440–1456
Srivastava RK, Huang SS, Dyer SB, Mourits FM (1995) Quantification of asphaltene flocculation during miscible CO2 flooding in the weyburn reservoir. J Can Petrol Technol 34:31–42
Kokal SL, Najman J, Sayegh SG, George AE (1992) Measurement and correlation of asphaltene precipitation from heavy oils by gas injection. J Can Petrol Technol 31:24–30
Thomas FB, Bennion DB, Bennion DW, Hunter BE (1992) Experimental and theoretical studies of solids precipitation from reservoir fluid. J Can Petrol Tech 31:22–31
Leontaritis KJ, Mansoori GA (1987) Asphaltene flocculation during oil recovery and processing: a thermodynamic-colloidal model. In: The SPE international symposium on oil field chemistry, San Antonio, USA
Jafari Behbahani T, Ghotbi C, Taghikhani V, Shahrabadi A (2011) Experimental investigation and thermodynamic modeling of asphaltene precipitation. Scientia Iranica C 18(6):1384–1390
Victorov AI, Firrozabadi A (1996) Thermodynamic micellization model of asphaltene precipitation from petroleum fluids. AIChE J 42:1753–1764
Chapman WG, Jackson G, Gubbins KE (1988) Phase equilibria of associating fluids Chain molecules with multiple bonding site. Mol Phys 65(5):1057–1079
Sayyad Amin J, Alamdari A, Mehranbod N, Ayatollahi Sh, Nikooee E (2010) Prediction of asphaltene precipitation: learning from data at different conditions. Energy Fuels 24:4046–4053
Rassamdana H, Sahimi M (1996) Asphalt flocculation and deposition: II. Formation and growth of fractal aggregates. AIChE J 42(12):3318–3332
Rassamdana H, Dabir B, Nematy M, Farhani M, Sahimi M (1996) Asphalt flocculation and deposition: I. The onset of precipitation. AIChE J 42:10–22
Rassamdana H, Farhani M, Dabir B, Mozaffarian BM, Sahimi M (1999) Asphalt flocculation and deposition. V. Phase behavior in miscible and immiscible injections. Energy Fuels 13(1):176–187
Hu Y-F, Guo T-M (2001) Effect of temperature and molecular weight of n-alkane precipitants on asphaltene precipitation. Fluid Phase Equilib 192:13–25
Ashoori S, Jamialahmadi M, Muller-Steinhagen H, Ahmadi K (2003) A new scaling equation for modeling of asphaltene precipitation. In: Presented at the SPE international technical conference and exhibition, Nigeria, August
Khaksar Menshad A, Mofidi AM, Shariatpanahi F, Edalat M (2008) Developing of scaling equation with function of pressure to determine onset of asphaltene precipitation. J Jpn Pet Inst 51:102–106
Bagheri MB, Mirzabozorg A, Kharrat R, Dastkhan Z, Ghotbi C (2009) Developing a new scaling equation for modeling of asphaltene precipitation. In: Canadian international petroleum conference (CIPC), Calgary, Alberta, Canada, June
Rasuli nokandeh N, Khishvand M, Naseri A (2012) An artificial neural network approach to predict asphaltene deposition test result. Fluid Phase Equilib 329:32–41
Kord Sh, Ayatollahi Sh (2012) Asphaltene precipitation in live crude oil during natural depletion: experimental investigation and modeling. Fluid Phase Equilib 336:63–70
Rostami H, Khaksar Manshad A (2013) Prediction of asphaltene precipitation in live and tank crude oil using Gaussian process regression. Pet Sci Technol 31:913–922
Naseri A, Khishvand M, Sheikhloo AA (2014) A correlations approach for prediction of PVT properties of reservoir oils. Pet Sci Technol 32:2123–2136
Hemmati-Sarapardeh A, Khishvand M, Naseri A (2013) Toward reservoir oil viscosity correlation. Chem Eng Sci 90:53–68
Mohaghegh S (2000, September 1). Virtual-intelligence applications in petroleum engineering: part 1—artificial neural networks. SPE, West Virginia U
Khishvand M, Khamehchi E (2012) Nonlinear risk optimization approach to gas lift allocation optimization. Ind Eng Chem Res 51(6):2637–2643
Zahedi G, Fazlali AR, Hosseini SM, Pazuki GR, Sheikhattar L (2009) Prediction of asphaltene precipitation in crude oil. J Pet Sci Eng 68:218–222
Zendehboudi S, Ahmadi MA, Mohammadzadeh O, Bahadori A, Chatzis I (2013) Thermodynamic investigation of asphaltene precipitation during primary oil production: laboratory and smart technique. Ind Eng Chem Res 52(17):6009–6031
Ahmadi MA (2011) Prediction of asphaltene precipitation using artificial neural network optimized by imperialist competitive algorithm. J Petrol Explor Prod Technol 1:99–106
Fattahi H, Gholami A, Amiri bakhtiar MS, Moradi S (2014) Estimation of asphaltene precipitation from titration data: a hybrid support vector regression with harmony search. Neural Comput Appl. doi:10.1007/s00521-014-1766-y
Sayyad Amin J, Nikooee E, Ghatee MH, Ayatollahib Sh, Alamdari A, Sedghamiz T (2011) Investigating the effect of different asphaltene structures on surface topography and wettability alteration. Appl Surf Sci 257:8341–8349
Sabbagh O, Akbarzadeh K, Badamchi-Zadeh A, Svrcek WY, Yarranton HW (2006) Applying the PR-EoS to asphaltene precipitation from n-alkane diluted heavy oils and bitumens. Energy Fuels 20:625–634
Shirani B, Nikazar M, Naseri A, Mousavi-Dehghani SA (2012) Modeling of asphaltene precipitation utilizing association equation of state. Fuel 93:59–66
Ghatee MH, Hemmateenejad B, Sedghamiz T, Khosousi T, Ayatollahi Sh, Seiedi O, Sayyad Amin J (2012) Multivariate curve resolution alternating least-squares as a tool for analyzing crude oil extracted asphaltene samples. Energy Fuels 26:5663–5671
Mousavi-Dehghani SA, Vafaie-Sefti M, Mirzayi B (2008) Polymer solution and lattice theory applications for modeling of asphaltene precipitation in petroleum mixtures. Braz J Chem Eng 25:523–534
Mousavi-Dehghani SA, Mirzayi B, Mousavi SM, Fasih M (2010) An applied and efficient model for asphaltene precipitation in production and miscible gas injection processes. Pet Sci Technol 28:113–124
Nakhli H, Alizadeh A, Sadeqi Moqadam M, Afshari S, Kharrat R, Ghazanfari MH (2011) Monitoring of asphaltene precipitation: experimental and modeling study. J Pet Sci Eng 78:384–395
Monteagudo JEP, Lage PLC, Rajagopal K (2001) Towards a polydisperse molecular thermodynamic model for asphaltene precipitation in live-oil. Fluid Phase Equilib 187:443–471
Kawanaka S, Park SJ, Mansoori GA (1988) The role of asphaltene deposition in EOR gas flooding: a predictive technique. In: Proceedings of the SPE/DOE enhanced oil recovery symposium, Tulsa, Oklahoma, April, 17–20, pp 617–627
Park SJ (1989) A thermodynamic polydisperse polymer model: asphaltene flocculation, aggregation and deposition. Dissertation, University of Illinois, Chicago, USA
Dabira B, Nematya M, Mehrabi A, Rassamdana H, Sahimi M (1996) Asphalt flocculation and deposition. III. The molecular weight distribution. Fuel 75:1633–1645
Rodríguez Vallés H (2006) A neural networks method to predict activity coefficients for binary systems based on molecular functional group contribution. Dissertation, University of Puerto Rico
Zahedi G, Jahanmiri A, Rahimpor MR (2005) A neural network approach for prediction of the CuO–ZnO–Al2O3 catalyst deactivation. Int J Chem React Eng 3:1542–6580
Zahedi G, Elkamel A, Lohi A, Jahnmiri A, Rahimpor MR (2005) Hybrid artificial neural network—first principle model formulation for the unsteady state simulation and analysis of a packed bed reactor for CO2 hydrogenation to methanol. Chem Eng J 115:113–120
Zahedi G, Fgaier H, Jahanmiri A, Al-Enezi G (2006) Artificial neural network identification and evaluation of hydrotreater plant. Pet Sci Technol 24:1447–1456
Bakshi BR, Utojo U (1998) Unification of neural and statistical modeling methods that combine inputs by linear projection. Comput Chem Eng 22:1859–1878
Ma C-G, Weng H-X (2009) Application of artificial neural network in the residual oil hydrotreatment process. Pet Sci Technol 27(18):2075–2084
Simon H (2001) Neural networks: a comprehensive foundation. Tsinghua University Press, Beijing
Wang X, Luo R, Shao H (1996) Designing a soft sensor for a distillation column with the fuzzy distributed radial basis function neural network. In: Proceedings of the 35th, conference on decision and control, Kobe, Japan, December
Ashoori S, Abedini A, Abedini R, Qorbani Nasheghi Kh (2010) Comparison of scaling equation with neural network model for prediction of asphaltene precipitation. J Pet Sci Eng 72:186–194
Haykin S (1999) Neural networks: a comprehensive foundation, 2nd edn. Prentice Hall, New Jersey
Moral H, Aksoy A, Gokcay CF (2007) Modeling of the activated sludge process by using artificial neural networks with automated architecture screening. Comput Chem Eng 32:2471–2478
Razmi-Rad E, Ghanbarzadeh B, Mousavi SM, Emam-Djomeh Z, Khazaei J (2007) Prediction of rheological properties of Iranian bread dough from chemical composition of wheat flour by using artificial neural network. J Food Eng 81:728–734
Acknowledgments
The authors would like to express their sincere gratitude to the members of Enhanced Oil Recovery Research Center of Shiraz University for their constructive comments. The authors have benefited from the fruitful discussions with Professor Shahabodin Ayatollahi, Department of Chemical and Petroleum Engineering, Sharif University of Technology, throughout the current study. His expert comments and help are gratefully appreciated.
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Alimohammadi, S., Sayyad Amin, J. & Nikooee, E. Estimation of asphaltene precipitation in light, medium and heavy oils: experimental study and neural network modeling. Neural Comput & Applic 28, 679–694 (2017). https://doi.org/10.1007/s00521-015-2097-3
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DOI: https://doi.org/10.1007/s00521-015-2097-3