Recovery of Oil in Limestone with Cationic Surfactant: Investigation of the Adsorption, Wettability, and Spontaneous Imbibition

Document Type: Research Paper

Authors

1 Federal University of Rio Grande do Norte

2 Department of Petroleum Engineering, Federal University of Rio Grande do Norte, Natal, Brazil

Abstract

The performance of petroleum recovery methods is dependent on the characteristics of the reservoir rock, oil quality, and formation water. One fundamental feature for considering petroleum recovery methods is the wettability of the rock reservoir. Also, this feature impacts the displacement of fluids in the rock reservior. In the case of the limestone, which normally features oil wettability, enhanced recovery methods are responsible for altering surface wettability. In this study, the effect of concentration of a cationic surfactant in the oil recovery from limestone is shown. In these tests, finite-bath technique was used to investigate adsorption by varying the amount of adsorbent and contact time. By carrying out contact angle assays, the wettability of the limestone was assessed. In addition, the oil recovery was effected by spontaneous imbibition. In this study, the limestone samples with solutions of CTAB in the concentrations of 0.8596 g/L and 1.2280 g/L, using a 2% KCl solution are treated. The results showed enhanced adsorption of CTAB at the CMC. The nature of this phenomenon did not induce changes in the wettability of the rock, which was confirmed by the contact angle measurements. In the spontaneous imbibition, more oil could be recovered when using a CTAB below the CMC, possibly due to less intense adsorption by the limestone.

Keywords


Zhou X., Morrow N. R., and Shouxiang M., “Interrelationship of Wettability, Initial Water Saturation, Aging Time, and Oil Recovery by Spontaneous Imbibition and Waterflooding,” Society of Petroleum Engineers, 2000, 5, 199-207.

Høgnesen E. J., Standnes D. C., and Austad T., “Scaling Spontaneous Imbibition of Aqueous Surfactant Solution into Preferential Oil-wet Carbonates,” Energy Fuels, 2004, 18, 1665-1675.

Babadagli T., “Analysis of Oil Recovery by Spontaneous Imbibition of Surfactant Solution,” Oil and Gas Science and Technology, 2005, 60, 697-710.

Karimaie H. and Torsæter O., “Effect of Injection Rate, Initial Water Saturation and Gravity on Water Injection in Slightly Water-wet Fractured Porous Media,” Journal of Petroleum Science and Engineering, 2007, 58, 293-308.

Agbalaka C., Dandekar A. Y., Patil S. L., Khataniar S., and et al., “The Effect of Wettability on Oil Recovery: A Review,” Asia Pacific Oil and Gas Conference and Exhibition, Perth, Australia, 2008, 1–13.

Al-Attar H. H., “Experimental Study of Spontaneous Capillary Imbibition in Selected Carbonate Core Samples,” Journal of Petroleum Science and Engineering, 2010, 70, 320-326.

Standnes D. C. and Austad T., “Wettability Alteration in chalk 2. Mechanism for Wettability Alteration from Oil-wet to Water-wet Using Surfactants,” Journal of Petroleum Science and Engineering, 2000, 28, 123-143.

Babadagli T. and Boluk Y., “Oil Recovery Performances of Surfactant Solutions by Capillary Imbibition,” Journal of Colloid and Interface Science, 2005, 282, 162-175.

Høgnesen E. J., Olsen M., and Austad T., “Capillary and Gravity Dominated Flow Regimes in Displacement of Oil from an Oil-wet Chalk Using Cationic Surfactant,” Energy Fuels, 2006, 20, 1118-1122.

Babadagli T., “Evaluation of the Critical Parameters in Oil Recovery from Fractured Chalks by Surfactant Injection,” Journal of Petroleum Science and Engineering, 2006, 54, 43-54.

Pons-Jiménez M., Cartas-Rosado R., Martínez-Magadán J. M., Oviedo-Roa R., and et al., “Theoretical and Experimental Insights on the True Impact of C12TAC Cationic Surfactant in Enhanced Oil Recovery for Heavy Oil Carbonate Reservoirs,” Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2014, 455, 76-91.

Karimi M., Al-Maamari R. S., Ayatollahi S., and Mehranbod N., “Wettability Alteration and Oil Recovery by Spontaneous Imbibition of Low Salinity Brine into Carbonates: Impact of Mg+2, SO4-2 and Cationic Surfactant,” Journal of Petroleum Science and Engineering, 2016, 147, 560–569.

Castro Dantas T. N., Ferreira Moura E., Scatena Júnior H., Dantas Neto A. A., and et al., “Micellization and Adsorption Thermodynamics of Ovel Ionic Surfactants at Fluid Interfaces,” Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2002, 207, 243–252.

Santanna V. C., Castro Dantas T. N., Borges T. A., Bezerril A. R., and et al., “The Influence of Surfactant Solution Injection in Oil Recovery by Spontaneous Imbibition,” Petroleum Science and Technology, 2014, 32, 2896–2902.

Ma K., Cui L., Dong Y., Wang T., and et al., “Adsorption of Cationic and Anionic Surfactants on Natural and Synthetic Carbonate Materials,” Journal of Colloid and Interface Science, 2013, 408, 164–172.

Jarrahian K., Seiedib O., Sheykhanc M., Vafaie Sefti M., and et al., “Wettability Alteration of Carbonate Rocks by Surfactants: A Mechanistic Study,” Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2012, 410, 1–10.

Wang Y., Ge J., Zhang G., Jiang P., and et al., “Adsorption Behavior of Dodecyl Hydroxypropyl Sulfobetaine on Limestone in High Salinity Water,” Royal Society of Chemistry, 2015, 5, 59738–59744.