Experimental Study of Improving the CO₂ Flooding Development Effect in Ultra-Low Permeability Reservoir

Abstract:

In order to improve the development effect of Chang-6 Oil Reservoir, five sets of different production pressure (1MPa, 2MPa, 3MPa, 4MPa, 5MPa) was designed to do CO2 immiscible flooding experiment to analyze the channeling laws. The experimental results showed that gas breakthrough time and gas channeling time were all shortened with the increasing of the pressure difference, but the ultimate recovery had a fluctuation change, increasing first and decreasing afterwards. And the production sharply increased in the gas breakthrough before and after. The best displacement effect was in 3MPa differential pressure. Then plugging experiment was made under the condition of 3MPa differential pressure, isopropyl amine was as plugging channeling agent. The experimental results: the residual resistance coefficient of plugging channeling agent was 8.56, and the range of enhancing recovery efficiency was 15%.

• Periodical: Advanced Materials Research (Volumes 594-597)
• Pages: 2470-2474
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.594-597.2470
• Online since: November 2012
• Authors: Lei Zhang, Feng Lan Zhao, Ji Rui Hou
• Keywords: Gas Channeling Laws, Immiscible Displacement, Isopropyl Amine, Plugging, Sweep Volume

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