Inhibition effect of CO2 on asphaltene precipitation for an Iranian crude oil and comparison with N2 and CH4

Mohsen Mohammadi; Mahdi Akbari; Alireza Bahramian; Mahdi Sadeghi Naeeni; Zahra Fakhroueian

Korean Journal of Chemical Engineering, Vol.30, No.2, 429-433, February, 2013

DOI10.1007/s11814-012-0144-7 Export Citation

Inhibition effect of CO2 on asphaltene precipitation for an Iranian crude oil and comparison with N2 and CH4

Mohsen Mohammadi^{1, 2}, Mahdi Akbari¹, Alireza Bahramian^{1, 3, †}, Mahdi Sadeghi Naeeni³, and Zahra Fakhroueian³

¹School of Chemical Engineering, University of Tehran, Tehran, Iran
²Faculty of Chemical Engineering, Tarbiat Modares University, Tehran, Iran
³Institute of Petroleum Engineering, University of Tehran, P. O. Box 11155-4563, Iran

E-mail:

The effects of N2, CH4 and CO2 injection on asphaltene precipitation have been experimentally investigated using a reservoir oil fluid from south of Iran, making use of light transmission method. The results are compared and the effects of injected gases on reducing asphaltene colloidal stability in oil are found in the following order: CH4> N2>CO2. It is observed that CO2 can act like an inhibitor and can increase the solubility of asphaltene, decreasing the asphaltene precipitation onset. A thermodynamic discussion explains the effect of CO2 on the solubility of asphaltene based on the solubility parameters of recombined oil and CO2, calculated from Peng-Robinson equation of state along with an empirical correlation for volumetric properties of CO2.

Keywords:Asphaltene;Asphaltene Precipitation Onset;Light Transmission Method;Gas Injection;Solubility Parameter

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[2] Pedersen KS, Christensen PL, Phase behavior of petroleum reservoir fluids, CRC Press (2007)

[3] Thawer R, Nicoll DCA, Dick G, SPE Prod. Eng., 5, 475 (1990)

[4] Son H, Lee Y, Seo J, Kim S, Lee W, Sung W, Korean J. Chem. Eng., 28(11), 2163 (2011)

[5] Soulgani BS, Rashtchian D, Tohidi B, Jamialahmadi M, J.Jpn. Petrol. Inst., 52(6), 322 (2009)

[6] Mohammadi M, Akbari M, Fakhroueian Z, Bahramian A, Azin R, Arya S, Energy Fuels, 25(7), 3150 (2011)

[7] Jamaluddin AKM, Joshi N, Lwere F, Gurpinar O, SPE International Petroleum Conference and Exhibition in Mexico, Villahermosa, February 2002 (SPE Paper 74393).

[8] Creek JL, Buckley JS, Wang J, SPE 2008 Offshore Technology Conference, Houston, Texas, U.S.A., May 2008 (SPE Paper 19690).

[9] Hu YF, Liu SLN, Chu YP, Park SJ, Mansoori GA, Guo TM, J. Pet. Sci. Eng., 41, 199 (2004)

[10] Hajizadeh A, Ravari RR, Amani M, 2009 SPE/EAGE Reservoir Characterization and Simulation Conference, Abu Dhabi, UAE, October (2009) (SPE Paper 123368).

[11] Gonzalez DL, Ting PD, Hirasaki GJ, Chapman WG, Energy Fuels, 19(4), 1230 (2005)

[12] Gonzalez DL, Vargas FM, Hirasaki GJ, Chapman WG, Energy Fuels, 22(2), 757 (2008)

[13] Hansen CM, Hansen Solubility Parameters: A User's Handbook, Second Ed., CRC Press (2007)

[14] Cipollina A, Anselmo R, Scialdone O, Filardo G, Galia A, J. Chem. Eng. Data, 52(6), 2291 (2007)

[15] Nikookar M, Omidkhah MR, Pazuki GR, Petroleum Sci.Technol., 26, 1904 (2008)

[16] Huang FH, Li MH, Lee LL, Starling KE, Chung FTH, J. Chem. Eng. Jpn., 18, 490 (1985)

[17] Williams LL, Rubin JB, Edwards HW, Ind. Eng. Chem. Res., 43(16), 4967 (2004)

[18] Kraiwattanawong K, Fogler HS, Gharfeh SG, Singh P, Thomason WH, Chavadej S, Energy Fuels, 21(3), 1248 (2007)

[19] Barton AFM, Handbook of solubility parameters and other cohesion parameters, CRC Press (1983)

[20] Goharshadi EK, Hesabi M, J. Mol. Liquids., 113, 125 (2004)

[21] Cavett RH, 27th API Meeting, San Francisco (1962)

[22] Danesh A, PVT and phase behaviour of petroleum reservoir fluids, Elsevier Science & Technology Books (1998)