Molecular mechanism of viscoelastic polymer enhanced oil recovery in nanopores.

ABSTRACT: Polymer flooding is a promising chemical enhanced oil recovery (EOR) method, which realizes more efficient extraction in porous formations characterized with nanoscale porosity and complicated interfaces. Understanding the molecular mechanism of viscoelastic polymer EOR in nanopores is of great significance for the advancement of oil exploitation. Using molecular dynamics simulations, we investigated the detailed process of a viscoelastic polymer displacing oil at the atomic scale. We found that the interactions between polymer chains and oil provide an additional pulling effect on extracting the residual oil trapped in dead-end nanopores, which plays a key role in increasing the oil displacement efficiency. Our results also demonstrate that the oil displacement ability of polymer can be r

SUBMITTER: Fan JC 

PROVIDER: S-EPMC6030297 | biostudies-literature | 2018 Jun

REPOSITORIES: biostudies-literature