Carbon Dioxide Applications for Enhanced Oil Recovery Assisted by Nanoparticles: Recent Developments

Area of Science:

• Petroleum Engineering
• Geological Sequestration
• Enhanced Oil Recovery

Background:

• Carbon dioxide (CO2) enhanced oil recovery (EOR) is crucial for maximizing recovery from mature oil fields.
• CO2-EOR offers a dual benefit of increased oil production and subterranean CO2 sequestration, aiding greenhouse gas reduction.
• Commercial CO2-EOR is established for light and medium gravity oil reservoirs, typically using continuous or alternating water injection.

Purpose of the Study:

• To review current CO2 injection techniques for enhanced oil recovery.
• To evaluate methods for controlling CO2 mobility in heterogeneous reservoirs.
• To explore recent advancements, particularly nanoparticle-surfactant systems, for improving CO2-EOR effectiveness.

Main Methods:

• Literature review of CO2-EOR techniques and mobility control strategies.
• Analysis of challenges in heterogeneous reservoirs, including viscous fingering and premature CO2 breakthrough.
• Examination of emerging methods involving nanoparticles and surfactants to stabilize CO2 foam.

Main Results:

• CO2 injection in EOR can lead to viscous fingering and early CO2 breakthrough in heterogeneous reservoirs.
• Conventional CO2 flooding methods have limitations in controlling fluid mobility.
• Nanoparticle-surfactant systems show promise in stabilizing CO2 foam, enhancing EOR efficiency.

Conclusions:

• Effective mobility control is essential for successful CO2-EOR in heterogeneous formations.
• Recent innovations, especially in foam stabilization using nanoparticles and surfactants, offer significant potential for improving CO2-EOR.
• Further research is needed to address challenges and uncertainties in optimizing advanced CO2 flooding techniques.