Molecular Dynamics Simulation of Surfactant Flooding Driven Oil-Detachment in Nano-Silica Channels

• DOI: 10.1021/acs.jpcb.8b09777
• Publication Date: 2018-12-27T17:19:05Z
• Authors: Xianqiong Tang; Shaofei Xiao; Qun Lei; Lingfang Yuan; Baoliang Peng; Lipeng He; Jianhui Luo; Yong Pei
• Keywords: Dynamics

Recovery of crude oil in rock nanopores plays an important role the petroleum industry. In this work, we carried out molecular dynamics (MD) simulations to study process ionic surfactant solution driven oil-detachment model silica (SiO2) nanochannels. Our MD simulation results revealed that induced by flooding can be described a three-stage including formation and delivery micelles, micelle disintegration-spread migration on oil–aggregate surface, aggregate deformation-to-detachment. A from rear (FFR) phenomenon is molecules tend migrate bottom caused water flow effect hydration polar head groups surfactants, which facilitate penetration into oil–rock interface, molecule detachment occurs at aggregate. The present also indicate dodecyl benzenesulfonate (SDBS) has higher oil-driven efficiency than trimethylammonium bromide (DTAB). difference displacement between two surfactants attributed property groups. Compared with −N(CH3)3+ headgroup DTAB, bare O atom −SO3– group stronger H bond interaction surrounding molecules. SDBS adjacent migrating more quickly, thus accelerating