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Evaluate the effectiveness and economic feasibility of nanofluid-enhanced oil recovery in marginal oil wells.

Enhanced Oil Recovery Using Nanofluid Injection in Marginal Wells: A Techno‐Economic Evaluation for Prolonged Field Life and Job Retention in Oil‐Dependent Regions

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Techno-economic evaluation shows nanofluid EOR improves oil recovery in marginal wells, suggesting economic benefits for local jobs.

Evaluate the effectiveness and economic feasibility of nanofluid-enhanced oil recovery in marginal oil wells.
Synthesized silica- and cobalt ferrite-based nanofluids stabilized with sodium dodecyl sulfate.
Conducted core flooding experiments on sandstone and carbonate cores under simulated reservoir conditions.
Performed economic analysis to assess costs and potential returns on investment.
Achieved incremental oil recovery of 14%-18% with optimal nanofluid concentration of 0.05 wt%.
Reduced interfacial tension from 32 to 6 mN/m and wettability from 115° to 45°.
Economic analysis indicated a recovery cost of $5.30/barrel and breakeven oil price of $34.

Ragunathan et al. (2026) studied this question.

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