Transportation and Potential Enhanced Oil Recovery Mechanisms of Nanogels in Sandstone


The transportation and potential enhanced oil recovery mechanisms of nanosized cross-linked polymeric particles (nanogels) with different charges are described herein. Three nanogels with different types of charges have been synthesized by suspension polymerization using acrylamide, 2-acrylamido-2-methylpropanesulfonic acid, and [2-(acryloyloxy)ethyl] trimethylammonium chloride (AETAC) monomers. The charged nanogels showed spherical morphology, porous structures, and narrow size distribution. The charged nanogels were able to adsorb onto the rock surface and modify the wettability, a critical parameter of the nanogel to recover residual oil. In addition, the static and dynamic adsorption of charged nanogels in sandstone has been demonstrated. Furthermore, the charged nanogels could reduce the permeability of water much more than the permeability of oil and emulsify residual oil as demonstrated by core flooding experiments. The nanogels with appropriate charges could offer the candidate through disproportionate permeability reduction and in situ emulsification for enhanced oil recovery.


Geosciences and Geological and Petroleum Engineering


The authors would like to express their grateful acknowledgement to the financial support from DOE under Contract No. DE-FE0024558.

Keywords and Phrases

Acrylic monomers; Amides; Chlorine compounds; Emulsification; Nanostructured materials; Oil well flooding; Petroleum transportation; Sandstone; Suspensions (fluids); Well flooding, 2-acrylamido-2-methylpropanesulfonic acid; Disproportionate permeability reductions; Enhanced oil recovery; Narrow size distributions; Polymeric particles; Spherical morphologies; Static and dynamic adsorptions; Suspension polymerization, Enhanced recovery

International Standard Serial Number (ISSN)

0887-0624; 1520-5029

Document Type

Article - Journal

Document Version


File Type





© 2018 American Chemical Society (ACS), All rights reserved.

Publication Date

01 Aug 2018