Effects of CEOR Chemicals on Asphaltene Precipitation
- Morgan Curren (Clariant Oil Services) | Anton Kaiser (Clariant Oil Services) | Stephanie Adkins (Ultimate EOR Services LLC) | Ali Qubian (Kuwait Oil Company) | Huda Al-Enezi (Kuwait Oil Company) | Heba Sana (Kuwait Oil Company) | Mohammed Al-Murayri (Kuwait Oil Company) | Mojdeh Delshad (Ultimate EOR Services LLC)
- Document ID
- Society of Petroleum Engineers
- SPE Annual Technical Conference and Exhibition, 24-26 September, Dallas, Texas, USA
- Publication Date
- Document Type
- Conference Paper
- 2018. Society of Petroleum Engineers
- 5.2 Fluid Characterization, 2.4 Hydraulic Fracturing, 1.8 Formation Damage, 5 Reservoir Desciption & Dynamics, 7.4.3 Market analysis /supply and demand forecasting/pricing, 5.4 Improved and Enhanced Recovery, 1.8 Formation Damage, 7.4 Energy Economics, 4.3.3 Aspaltenes, 5.4 Improved and Enhanced Recovery, 5.2.1 Phase Behavior and PVT Measurements, 7 Management and Information, 2.5.2 Fracturing Materials (Fluids, Proppant), 2 Well completion
- Inhibitor, Chemical EOR, ASP, Asphaltene
- 1 in the last 30 days
- 253 since 2007
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Enhanced oil recovery methods are appealing to increase oil recovery from reservoirs due to market pressures in times of lower oil price. Chemical enhanced oil recovery (cEOR) methods such as ASP involve the use of alkali, surfactant, and polymer, to create an ultralow interfacial tension (IFT) between microemulsion and oil phases. These chemicals have the potential to interact with asphaltenes in crude oil and may cause either a decrease or an increase in asphaltene deposition. This paper presents an investigation into the effects of ASP chemicals on asphaltene precipitation.
Crude oil, from a cEOR-nominated Kuwaiti reservoir, was analyzed with an ASP formulation that was determined through microemulsion phase behavior experiments. Crude oil, chemical components, and incompatible solvent were added together, and light transmission was measured over a 15-minute period to determine asphaltene precipitation over time.
A blank graph of the crude in incompatible solvent showed a light transmission increase of 36.2% over the test duration indicating asphaltene precipitation. If asphaltenes remain suspended in oil, light transmission remains low and stable from the beginning to the end of the test. Addition of asphaltene inhibitor (AI) to the crude oil prevented asphaltene flocculation which was evidenced by a maximum light transmission of 3.0%, an efficiency of 91.7% dispersability relative to the blank sample. With addition of the ASP formulation, light transmission increased which indicates interaction between (1) chemical species of the ASP formulation with asphaltenes or (2) the alkali in the chemical package altering the pH and causing more asphaltene precipitation from suspension in the crude. Maximum light transmission of oil dosed with the chemical additives is 41.3% which is a decrease in asphaltene inhibition efficiency of 14.1% relative to the blank. With the addition of AI to the crude containing the chemical additives, the maximum light transmission is 6.5% indicating an efficiency of 82% asphaltene dispersability. Results indicate a clear relationship between addition of ASP chemicals and asphaltene precipitation. Conditions will differ for other crude oils and cEOR formulations, but asphaltene scaling issues should be considered for cEOR projects.
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Gholoum, E. F., Oskui, G. P., & Salman M. (2003, January 1). Investigation of Asphaltene Precipitation onset Conditions for Kuwaiti Reservoirs. Society of Petroleum Engineers. doi:10.2118/81571-MS.
Srivaslava, A. K., Huang, S. S., Dye, S. B., & Mourits F. M. (1993, January 1). Quantification Of Asphaltene Flocculation During Miscible CO Flooding In The Weyburn Reservoir. Petroleum Society of Canada. doi:10.2118/SS-93-28.
Novosad, Z., & Costain, T. G. (1990, January 1). Experimental and Modeling Studies of Asphaltene Equilibria for a Reservoir Under CO2 Injection. Society of Petroleum Engineers. doi:10.2118/20530-MS.
Levitt, D.B, Jackson, A.C., Heinson, C., Britton, L.N., Malik, T., Dwarakanath, V., and Pope, G.A. Identification and Evaluation of High-Performance EOR Surfactants. SPE Reservoir Evaluation and Engineering 12, 2, 243–253. SPE-100089-PA. Doi: 10.2118/100089-PA.
Lu, J., Britton, C., Solairaj, S., Liyanage, P.J., Kim, D.H., Adkins, S., Arachchilage, G.W.P., Weerasooriya, U., and Pope, G. Novel Large-Hydrophobe Alkoxy Carboxylate Surfactants for Enhanced Oil Recovery. SPEJ 19, 6, 1024–1034. SPE-154261-PA. Doi: 10.2118/154261-PA.
Liyanage, P.J., Solairaj, S., Arachchilage, G.W.P., Linnemeyer, H.C., Kim, D.H., Weerasooriay, U., and Pope, G.A. Alkaline Surfactant Polymer Flooding using a Novel Class of Large Hydrophobe Surfactants. SPE Improved Oil Recovery Symposium, Tulsa, OK, 14-18 April 2012. Conference paper. SPE-154274-MS. Doi: 10.2118/154274-MS.
Leon, O., Contreras, E., Rogel, E., Dambakli, G., Espidel, J., Acevedo, S. (2001, August 24). The Influence of the Adsorption of Amphiphiles and Resins in Controlling Asphaltene Flocculation. Energy Fuels 15, 5, 1028–1032. Doi: 10.1021/ef010032n.
Flaaten, A., Nguyen, Q. P., Pope, G. A., & Zhang, J. (2008, January 1). A Systematic Laboratory Approach to Low-Cost High-Performance Chemical Flooding. Society of Petroleum Engineers. Doi: 10.2118/113469-MS.
Al-Murayri, M. T., Al-Kharji, A. A., Kamal, D. S., Al-Ajmi, M. F., Al-Ajmi, R. N., Al-Shammari, M. J., Al-Asfoor, T.H., Badham, S.J., Bouma, C., Brown, J., Suniga, P. (2018, March 26-28). Successful Implementation of a One-Spot Alkaline-Surfactant-Polymer ASP Pilot in a Giant Carbonate Reservoir. SPE EOR Conference at Oil and Gas West Asia, Muscat, Oman 26-28 March 2018. SPE-190374-MS. doi:10.2118/190374-MS.
Al-Murayri, M. T., Kamal, D. S., Suniga, P., Fortenberry, R., Britton, C., Pope, G. A., Liyanage, P. J., Jang, S. H., Upamali, K. A. N. (2017, October 09-11). Improving ASP Performance in Carbonate Reservoir Rocks Using Hybrid-Alkali. Presented at the Annual Technical Conference and Exhibit, San Antonio, Texas, 09-11 October 2017. SPE-187213-MS. http://dx.doi.org/10.2118/187213-MS.