Microbial Community Distribution in Low Permeability Reservoirs and Their Positive Impact on Enhanced Oil Recovery

Area of Science:

• Petroleum Engineering
• Microbiology
• Geochemistry

Background:

• Low permeability oil reservoirs are crucial for global oil reserves.
• Developing these reservoirs is challenging due to complex geological conditions.
• Understanding microbial roles in enhanced oil recovery is vital.

Purpose of the Study:

• Investigate microbial community distribution and growth in low permeability reservoirs.
• Elucidate the mechanisms of microbial enhanced oil recovery (MEOR).
• Correlate microbial diversity and activity with oil recovery efficiency.

Main Methods:

• High-throughput genomics and functional gene analysis.
• Laboratory and field data integration.
• Analysis of microbial community structure and metabolic products.

Main Results:

• Microbial communities exhibit strong heterogeneity, correlated with reservoir permeability and porosity.
• Higher microbial diversity positively correlates with oil recovery efficiency.
• Microbial metabolites reduce interfacial tension and improve oil fluidity, enhancing recovery.

Conclusions:

• Microbial community structure is influenced by reservoir geology.
• MEOR effectiveness is linked to microbial activity and metabolite production.
• This study provides a foundation for optimizing MEOR in low permeability reservoirs.