The composition of acid/oil interface in acid oil emulsions
Tóm tắt
In well stimulation treatments using hydrochloric acid, undesirable water-in-oil emulsion and acid sludge may produce and then cause operational problems in oil field development. The processes intensify in the presence of Fe(III), which are from the corroded surfaces of field equipment and/or iron-bearing minerals of the oil reservoir. In order to understand the reasons of the stability of acid emulsions, acid emulsions were prepared by mixing crude oil emulsion with 15% hydrochloric acid solutions with and without Fe(III) and then separated into free and upper (water free) and intermediate (with water) layers. It is assumed that the oil phase of the free and upper layers contains the compounds which do not participate in the formation of acid emulsions, and the oil phase of the intermediate layers contains components involved in the formation of oil/acid interface. The composition of the oil phase of each layer of the emulsions was studied. It is found that the asphaltenes with a high content of sulfur, oxygen and metals as well the flocculated material of protonated non-polar oil components are concentrated at the oil/acid interface. In addition to the above, in the presence of Fe(III) the Fe(III)-based complexes with polar groups of asphaltenes are formed at the acid/oil interface, contributing to the formation of armor films which enhance the emulsion stability.
Tài liệu tham khảo
Abdel-Raouf ME. Factors affecting the stability of crude oil emulsions. In: Abdel-Raouf ME, editor. Crude oil emulsions—composition stability and characterization. InTech: Groatia; 2012. p. 183–201. https://doi.org/10.5772/35018.
Antipenko VR, Pevneva GS, Zemtseva LI. Composition of products of interaction of components of residual oil fractions with ferric chloride. Neftekhimiya. 1994;34:82–94.
Brandal Ø, Sjöblom J, Øye G. Interfacial behaviour of naphthenic acids and multivalent cations in systems with oil and water, part I: a pendant drop study of interactions between n-dodecyl benzoic acid and divalent cations. J Disp Sci Technol. 2004;25:367–74. https://doi.org/10.1081/DIS-120037687.
Brandal Ø, Sjoblom J. Interfacial behavior of naphthenic acids and multivalent cations in systems with oil and water. II: formation and stability of metal naphthenate films at oil-water interfaces. J Disp Sci Technol. 2005;26:53–8. https://doi.org/10.1081/DIS-200040145.
Dechaine GP, Gray MR. Chemistry and association of vanadium compounds in heavy oil and bitumen, and implications for their selective removal. Energy Fuels. 2010;24:2795–808. https://doi.org/10.1021/ef100173j.
Dechaine GP, Gray MR. Membrane diffusion measurements do not detect exchange between asphaltene aggregates and solution phase. Energy Fuels. 2011;25(2):509–23. https://doi.org/10.1021/ef101050a.
Fredd CN, Fogler HS. Alternative stimulation fluids and their impact on carbonate acidizing. SPE J. 1998;13:34–41. https://doi.org/10.2118/31074-MS.
Ganeeva YuM, Yusupova TN, Romanov GV. Asphaltene nano-aggregates: structure, phase transitions and effect on petroleum systems. Russ Chem Rev. 2011;80:993–1008. https://doi.org/10.1070/rc2011v080nl0abeh004174.
Gao S, Moran K, Xu Z, Masliyah J. Role of naphthenic acids in stabilizing water-in-diluted model oil emulsions. J Phys Chem B. 2010;114(23):7710–8. https://doi.org/10.1021/jp910855q.
Hadabi IA, Sasaki K, Sugai Yu. Effect of kaolinite on water-in-oil emulsion formed by steam injection during tertiary oil recovery: a case study of an Omani heavy oil sandstone reservoir with high kaolinite sludge content. Energy Fuels. 2016;30:10917–24. https://doi.org/10.1021/acs.energyfuels.6b01822.
Khadim MA, Sarbar MA. Role of asphaltene and resin in oil field emulsions. J Pet Sci Eng. 1999;23:213–21. https://doi.org/10.1016/s0920-4105(99)00024-8.
McLean JD, Kilpatrick PK. Effects of asphaltene aggregation in model heptane–toluene mixtures on stability of water-in-oil emulsions. J Colloid Interface Sci. 1997;196(1):23–34. https://doi.org/10.1006/jcis.1997.5177.
Muller H, Pauchard VO, Hajji AA. Role of naphthenic acids in emulsion tightness for a low total acid number (TAN)/high asphaltenes oil: characterization of the interfacial chemistry. Energy Fuels. 2009;23:1280–8. https://doi.org/10.1021/ef800620e.
Mullins OC. The modified Yen model. Energy Fuels. 2010;24(4):2179–207. https://doi.org/10.1021/ef900975e.
O’Neil B, Maley D, Lalchan C. Prevention of acid-induced asphaltene precipitation: a comparison of anionic vs. cationic surfactants. J Can Pet Technol. 2015;1:49–62. https://doi.org/10.2118/164087-pa.
Pereira RCL, Carvalho RM, Couto BC, de Oliveira MCK, Eberlin MN, Vaz BG. Waxy crude oil emulsion gel: chemical characterization of emulsified phase extract components. Energy Fuels. 2014;28:7352–8. https://doi.org/10.1021/ef500962e.
Poindexter MK, Marsh SC. Inorganic solid content governs water-in-crude oil emulsion stability predictions. Energy Fuels. 2009;23:1258–68. https://doi.org/10.1021/ef800652n.
Qjao P, Harbottle D, Tchoukov P, Wang X, Xu Z. Asphaltene subfractions responsible for stabilizing water-in-crude oil emulsions Part 3. Effect of solvent aromaticity. Energy Fuels. 2017;31:9179–87. https://doi.org/10.1021/acs.energyfuels.7b01387.
Rietjens M. Sense and non-sense about acid-induced sludge. In: SPE European formation damage conference, Hague, The Netherlands, June 2–3, 1997. https://doi.org/10.2118/38163-MS.
Rietjens M, Haasterecht MV. Phase transport of HCl, HFeCl4, water, and crude oil components in acid–crude oil systems. J Colloid Interface Sci. 2003;268:489–500. https://doi.org/10.1016/j.jcis.2003.08.030.
Rietjens M, Nieuwpoort M. An analysis of crude oil-acid reaction products by size-exclusion chromatography. Fuel. 2001;80:33–40. https://doi.org/10.1016/S0016-2361(00)00073-9.
Rocha JA, Baydak EN, Yarranton HW. What fraction of the asphaltenes stabilizes water-in-bitumen emulsions? Energy Fuels. 2018;32:1440–50. https://doi.org/10.1021/acs.energyfuels.7b03532.
Rojas-Ruiz FA, Orrego-Ruiz JA. Finding a relationship between the composition and the emulsifying character of asphaltenes through FTICR-MS. CT&F. 2018;8:45–52. https://doi.org/10.29047/01225383.90.
Sedghi M, Goual L. Role of resins on asphaltene stability. Energy Fuels. 2009;24(4):2275–80. https://doi.org/10.1021/ef9009235.
Shirazi MM, Ayatollahi S, Ghotbi C. Damage evaluation of acid-oil emulsion and asphaltic sludge formation caused by acidizing of asphaltenic oil reservoir. J Pet Sci Eng. 2019;174:880–90. https://doi.org/10.1016/j.petrol.2018.11.051.
Spiecker PM, Gawrys KL, Trail CB, Kilpatrick PK. Effects of petroleum resins on asphaltene aggregation and water-in-oil emulsion formation. Colloids Surf A. 2003;220:9–27. https://doi.org/10.1016/s0927-7757(03)00079-7.
Sullivan AP, Kilpatrick PK. The effects of inorganic solid particles on water and crude oil emulsion stability. Ind Eng Chem Res. 2002;41:3389–404. https://doi.org/10.1021/ie010927n.
Tayeb KB, Delpoux O, Barbier J, Marques J, Verstraete J, Vezin H. Applications of pulsed electron paramagnetic resonance spectroscopy to the identification of vanadyl complexes in asphaltene molecules. Part 1: influence of the origin of the feed. Energy Fuels. 2015;29:4608–15. https://doi.org/10.1021/acs.energyfuels.5b00733.
Umar AA, Mohd Saaid IB, Sulaimon AA, Bint R, Pilus M. A review of petroleum emulsions and recent progress on water-in-crude oil emulsions stabilized by natural surfactants and solids. J Pet Sci Eng. 2018;165:673–90. https://doi.org/10.1016/j.petrol.2018.03.014.
Unger FG, Andreeva LN. Fundamental aspects of the oil chemistry. Nature of the resins and asphaltenes. Novosibirsk: Nauka. Sibirskay izdatelskay firma RAN; 1995.
Yang F, Tchoukov P, Pensini E, Dabros T, Czamecki J, Masliyah J et al. Asphaltene subfractions responsible for stabilizing water-in-crude oil emulsions. Part 1: interfacial behaviors. Energy Fuels. 2014;28:6897–904. https://doi.org/10.1021/ef501826g.
Yang F, Tchoukov P, Dettman H, Teklebrhan RB, Liu L, Dabros T et al. Asphaltene subfractions responsible for stabilizing water-in-crude oil emulsions. Part 2: molecular representations and molecular dynamics simulations. Energy Fuels. 2015;29:4783–94. https://doi.org/10.1021/acs.energyfuels.5b00657.
Yen TF, Erdman JG, Saraceno AJ. Investigation of structure of petroleum asphaltenes and related substances by electron spin resonance. Anal Chem. 1962;34:694–700.