Study on Minimum Miscible Pressure and Oil Displacement Law for CO₂ Flooding

Abstract:

In laboratory, the minimum miscible pressure (MMP) of oil and CO₂ was studied by using a slim tube model. The results showed that the greater the gas injection pressure, the higher the cumulative recovery. The gas breakthrough when the gas was injected with a volume of 0.7~0.8PV, the trend of cumulative recovery increase slowed down and the produced gas-oil ratio increased dramatically. Core flooding experiments were carried to compare the effects of CO₂ and water flooding. As a result, the ultimate oil recovery of CO₂ flooding increased with the increase of gas injection pressure. If the gas flooding was miscible, the ultimate recovery of CO₂ flooding was generally higher than that of water flooding.

• Periodical: Advanced Materials Research (Volumes 391-392)
• Pages: 1051-1054
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.391-392.1051
• Online since: December 2011
• Authors: Shu Li Chen, Wen Xiang Wu, Jia Bin Tang
• Keywords: CO₂ Flooding, CO₂-Oil Exchange Rate, Displacement Efficiency, Injection Capacity, Minimum Miscible Pressure

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