A probabilistic assessment methodology for carbon dioxide enhanced oil recovery and associated carbon dioxide retention

The wettability, fingering effect and strong heterogeneity of carbonate reservoirs lead to low oil recovery. However, carbon dioxide (CO2) displacement is an effective method to improve oil recovery for carbonate reservoirs. Saturated CO2 nanofluids combines the advantages of CO2 and nanofluids, which can change the reservoir wettability and improve the sweep area to achieve the purpose of enhanced oil recovery (EOR), so it is a promising technique in petroleum industry. In this study, comparative experiments of CO2 flooding and saturated CO2 nanofluids flooding were carried out in carbonate reservoir cores. The nuclear magnetic resonance (NMR) instrument was used to clarify oil distribution during core flooding processes. For the CO2 displacement experiment, the results show that viscous fingering and channeling are obvious during CO2 flooding, the oil is mainly produced from the big pores, and the residual oil is trapped in the small pores. For the saturated CO2 nanofluids displacement experiment, the results show that saturated CO2 nanofluids inhibit CO2 channeling and fingering, the oil is produced from the big pores and small pores, the residual oil is still trapped in the small pores, but the NMR signal intensity of the residual oil is significantly reduced. The final oil recovery of saturated CO2 nanofluids displacement is higher than that of CO2 displacement. This study provides a significant reference for EOR in carbonate reservoirs. Meanwhile, it promotes the application of nanofluids in energy exploitation and CO2 utilization.

Download Full-text

Application of Sustainable Foaming Agents to Control the Mobility of Carbon Dioxide in Enhanced Oil Recovery

10.2118/163287-ms ◽

2012 ◽

Cited By ~ 1

Author(s):

Roozbeh Rafati ◽

Hossein Hamidi ◽

Ahmad Kamal Idris

Keyword(s):

Carbon Dioxide ◽

Enhanced Oil Recovery ◽

Oil Recovery ◽

Foaming Agents

Download Full-text

Carbon Dioxide-Enhanced Oil Recovery in Indonesia:

10.22617/tcs190600 ◽

2019 ◽

Author(s):

Keyword(s):

Carbon Dioxide ◽

Enhanced Oil Recovery ◽

Oil Recovery

Download Full-text

Life-cycle Assessment of Carbon Dioxide Capture for Enhanced Oil Recovery

Chinese Journal of Chemical Engineering ◽

10.1016/s1004-9541(08)60085-3 ◽

2008 ◽

Vol 16 (3) ◽

pp. 343-353 ◽

Cited By ~ 45

Author(s):

Edgar G. Hertwich ◽

Martin Aaberg ◽

Bhawna Singh ◽

Anders H. Strømman

Keyword(s):

Carbon Dioxide ◽

Life Cycle Assessment ◽

Life Cycle ◽

Enhanced Oil Recovery ◽

Oil Recovery ◽

Carbon Dioxide Capture

Download Full-text

Self-gasified biosystems for enhanced oil recovery

International Journal of Modern Physics B ◽

10.1142/s021797922150274x ◽

2021 ◽

pp. 2150274

Author(s):

B. A. Suleimanov ◽

S. J. Rzayeva ◽

U. T. Akhmedova

Keyword(s):

Carbon Dioxide ◽

Enhanced Oil Recovery ◽

Oil Recovery ◽

Experimental Studies ◽

Microbial Enhanced Oil Recovery ◽

Heterogeneous Porous Medium ◽

Oil Displacement ◽

Subcritical Region ◽

Reservoir Conditions

Microbial enhanced oil recovery is considered to be one of the most promising methods of stimulating formation, contributing to a higher level of oil production from long-term fields. The injection of bioreagents into a reservoir results in the creation of oil-displacing agents along with a significant amount of gases, mainly carbon dioxide. Earlier, the authors failed to study the preparation of self-gasified biosystems and the implementation of the subcritical region (SR) under reservoir conditions. Gasified systems in the subcritical phase have better oil-displacing properties than nongasified systems. In a heterogeneous porous medium, the filtration profile of gasified liquids in the SR should be more uniform than for a degassed liquid. Based on experimental studies, the superior efficiency of oil displacement by gasified biosystems compared with degassed ones has been demonstrated. The possibility of efficient use of gasified hybrid biopolymer systems has been shown.

Download Full-text