An Innovative Dielectric Constant Measurement Method to Determine the Ideal Surfactant Candidate to Enhance Heavy Oil Recovery
- M. Alshaikh (Texas A&M University) | G. Huff (Texas A&M University) | B. Hascakir (Texas A&M University)
- Document ID
- Society of Petroleum Engineers
- SPE Canada Heavy Oil Technical Conference, 13-14 March, Calgary, Alberta, Canada
- Publication Date
- Document Type
- Conference Paper
- 2018. Society of Petroleum Engineers
- 2 Well completion, 4.3.3 Aspaltenes, 5.4 Improved and Enhanced Recovery, 4.1.5 Processing Equipment, 5.4.6 Thermal Methods, 5.4 Improved and Enhanced Recovery, 2.4 Hydraulic Fracturing, 2.5.2 Fracturing Materials (Fluids, Proppant)
- asphaltenes-surfactant interaction, resins-surfactant interaction, Steam-surfactant
- 1 in the last 30 days
- 170 since 2007
- Show more detail
- View rights & permissions
|SPE Member Price:||USD 9.50|
|SPE Non-Member Price:||USD 28.00|
Steam injection is widely used enhanced oil recovery technique for heavy oil extraction. However, environmental and economic drawbacks of steam generation make the chemical additive-steam injection processes more favorable than steam injection alone. In this study, the performance of surfactant-steam flood process were investigated for heavy oil recovery and a quick recipe was proposed for the right surfactant selection through dielectric constant measurements.
Experiments were conducted on two heavy oil samples with different API gravity (12.09° and 11.56°) and viscosity (10,100 cP and 208,500 cP). Three anionic surfactants with same polar head group (sodium sulfate) but with different nonpolar tail length [long (SDS), moderate (SDeS), and short (SOS)] were selected to be tested. The crude samples and their SARA (Saturate, Aromatic, Resins, and Asphaltenes) fractions were blended with surfactant solutions at their critical micelle concentration (CMC). Interaction of crude oils, crude oils' non-polar fractions (Saturates and Aromatics) and crude oils' polar fractions (Resins and Asphaltenes) with surfactant solutions were visualized under optical microscope. An innovative and quick method, dielectric constant measurements were used to quantify indirectly the polarity of the blends. These measurements were used to determine the best surfactant candidates to recover each oil samples and accuracy of this new method was validated through optical microscopy images.
Microscopic images revealed asphaltenes have the higher contribution in the formation of micro-emulsions. It is observed that the polar-polar interaction of asphaltenes with resins adversely affected the surfactant performance due to reduction in overall polarity. We found that as the dielectric constant increases, the polarity of the oil/surfactant blends (microemulsions) increases which indicates that polar-polar interaction between oil/surfactant is minimized and the effectiveness of surfactants is maximized. Microscopic images were used to confirm this finding and for the blends having higher dielectric constants, minimum interaction of resins with surfactants and lower asphaltene aggregation for the same crude oil-surfactant blends were observed.
Our results offer that dielectric constant measurements can be used as an innovative and easy surfactant screening method.
|File Size||1 MB||Number of Pages||12|
Al Adasani, A. and Bai, B. 2011. Analysis of Eor Projects and Updated Screening Criteria. Journal of Petroleum Science and Engineering 79 (1-2): 10–24. DOI: 10.1016/j.petrol.2011.07.005
ASTM. 2011. Standard Test Method for Characteristic Groups in Rubber Extender and Processing Oils and Other Petroleum-Derived Oils by the Clay–Gel Absorption Chromatographic Method. 2011 ASTM Annual Book of Standards. DOI: 10.1520/D2007-11R16
Chu, C. 1985. State-of-the-Art Review of Steamflood Field Projects. DOI: 10.2118/11733-PA
Demirbas, A. 2016. Deposition and Flocculation of Asphaltenes from Crude Oils. Petroleum Science and Technology 34 (1): 6–11. DOI: 10.1080/10916466.2015.1115875
Hirasaki, G., Miller, C.A., and Puerto, M. 2011. Recent Advances in Surfactant Eor. DOI: 10.2118/115386-PA
Kumar, R., Dao, E., and Mohanty, K. 2012. Heavy-Oil Recovery by in-Situ Emulsion Formation. DOI: 10.2118/129914-PA
Willman, B.T., Valleroy, V.V., Runberg, G.W.. 1961. Laboratory Studies of Oil Recovery by Steam Injection. DOI: 10.2118/1537-G-PA
Zeidani, K. and Gupta, S.C. 2013. Surfactant-Steam Process: An Innovative Enhanced Heavy Oil Recovery Method for Thermal Applications. Society of Petroleum Engineers. DOI: 10.2118/165545-MS.