Molecular Dynamics Investigation of Surfactant-Oil Interactions within Quartz Slit Pores during Spontaneous Imbibition.

ABSTRACT: During the spontaneous imbibition stage of tight reservoirs, surfactant-based displacement agents play a crucial role in regulating the interfacial wettability and enhancing oil recovery. However, the microscopic mechanism governing the interaction among surfactants, oil, and mineral surfaces remains elusive. The interfacial properties of oil-surfactant systems in hydroxylated SiO₂ slit pores were studied via molecular dynamics simulations. Three representative surfactantsSDS, CTAB, and HGMEwere selected to elucidate how their polarity and molecular architecture affect adsorption configuration, diffusion, and wettability at the solid-liquid interface. The results reveal distinct interfacial morphologies: in the SDS system, oil forms two asymmetric clusters with contact angles

SUBMITTER: Du S 

PROVIDER: S-EPMC12854505 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature