Impact of Fe3O4 nanoparticles on asphaltene precipitation during CO2 injection

Visualization of asphaltene precipitation and deposition in a uniformly patterned glass micromodel

“…Accordingly, asphaltenes are commonly defined as solubility class of crude oil components. Asphaltenes are soluble in aromatics such as toluene and xylene, while insoluble in normal alkanes such as n-pentane and nheptane [5,7,8]. The stability of asphaltene in crude oil may be disrupted due to changes in temperature, pressure, composition and surface characteristics of rock/fluid interface [9][10][11].…”

Adsorption-desorption of n–C7 asphaltenes over micro- and nanoparticles of silica and its impact on wettability alteration

“…Hence, as proven by the studies above, once asphaltene compounds are adsorbed on the reservoir rock surface, wettability is altered to an oil-wet state until an effective treatment for asphaltene desorption is applied. Recently, nanoparticles have shown high potential for in-situ applications in the areas of inhibition of different types of formation damage (Franco, Nassar, Ruiz, Pereira-Almao, & Cortés, 2013c;Hashemi et al, 2015;Kazemzadeh, Malayeri, Riazi, & Parsaei, 2015a;Nassar, Betancur, Acevedo, Franco, & Cortés, 2015a;Shayan and Mirzayi, 2015;Zabala et al, 2014), enhanced oil recovery (Ehtesabi, Ahadian, & Taghikhani, 2014;Giraldo, Benjumea, Lopera, Cortés, & Ruiz, 2013a;Hashemi, Nassar, & Almao, 2014a;Hashemi, Nassar, & Pereira-Almao, 2012;Hashemi, Nassar, & Pereira Almao, 2013a;Hosseinpour, Mortazavi, Bahramian, Khodatars, & Khodadadi, 2014;Karimi et al, 2012;Kazemzadeh et al, 2015b) and heavy and extra-heavy oil upgrading (Franco et al, 2013b;Franco et al, 2014;Franco et al, 2015;Hamedi Shokrlu and Babadagli, 2013;Hosseinpour, Khodadadi, Bahramian, & Mortazavi, 2013;Hashemi, Nassar, & Pereira Almao, 2013b;Hashemi, Nassar, & Pereira Almao, 2014b;Mora, Franco, & Cortés, 2013;Nassar et al, 2015b;Nassar et al, 2012). Regarding the asphaltene-related problems, nanoparticles can restore wettability from an oil-wet state to a waterwet state (Giraldo et al, 2013a;Karimi et al, 2012).…”

Experimental study of water-based nanofluid alternating gas injection as a novel enhanced oil-recovery method in oil-wet carbonate reservoirs

“…Carbon dioxide flooding is a winewin strategy because it can enhance oil recovery and simultaneously reduce CO 2 emissions into the atmosphere (Song et al, 2014). Inexpensive and redundant green-house CO 2 gas can be captured then injected into oil reservoirs to enhance oil recovery (Kazemzadeh et al, 2015;Sarma, 2003;Kokal et al, 1992). Difficulties and constraints of conventional water or gas flooding methods, such as an inappropriate mobility ratio and early fingering of the injected fluid, led to the invention of water alternating gas (WAG) injection as a combination of these two methods in the last decades (Bermude and Johns, 2007).…”