Quantitative investigation of nanofluid imbibition in tight oil reservoirs based on NMR technique

• DOI: 10.1016/j.petsci.2022.04.013
• Publication Date: 2022-04-28T17:05:45Z
• Authors: Tian-Tian Zhang; Zhi-Ping Li; Caspar Daniel Ade...; Yong-Zhou Wei; Zhen-Fu Ma; Qing You
• Keywords: Imbibition; Cationic polymerization

Nanofluids have been effective chemical additives for enhanced oil recovery (EOR) in tight reservoirs due to their special properties. However, imbibition recoveries vary different nanofluids. The oil/water distribution rocks during using various nanofluids was less discussed previous studies. In this study, we systematically examined the efficiencies of at 60 °C. Furthermore, migration and rock pores were monitored nuclear magnetic resonance (NMR). prepared by dispersing silica nanoparticles five types surfactants (i.e., anionic-nonionic, anionic, nonionic, amphoteric cationic deionized (DI) water. Subsequently, interfacial tension (IFT) contact angle measurements conducted reveal underlying EOR mechanisms experimental results showed that potential order anionic-nonionic > anionic nonionic brine. Anionic-nonionic (sodium lauryl ether sulfate (SLES)) dodecyl sulfonate (SDS)) exhibited excellent capability wettability alteration, increased 27.96% 23.08%, respectively, compared NMR also mesopores (0.1–1 μm) dominant developed rocks, contributed most efficiency. addition, initially took place micropores before moving into macropores. This study provides fundamental information on selection reservoirs. improved understanding proposed