Title: Laboratory Experimental Results of Huff ‘n’ Puff CO2 Flooding in a Fractured Core System
Abstract: Abstract In this study, the performance and efficiency of CO2 huff-and-puff process for improving oil recovery and subsequent storage of CO2 in fractured porous media is examined and the results of laboratory tests are presented. The experimental set up consisted of a high-pressure stainless steel cell made specially to hold a cylindrical core with spacing around it to simulate fractures surrounding matrix. The matrix was saturated with normal decane, which was used as oil during these experiments. Over six sets of huff-and-puff experiments, using CO2 as solvent, were conducted for pressures of 250, 500, 750, 1000, 1250, and 1500 psi. Each set of the huff-and-puff experiments were conducted by injecting CO2 in the fracture surrounding the core (injection step). Then, the system was shut-in for a period of 24 hours to allow CO2 to diffuse from fracture into the oil in matrix (soaking period step). At the end of soaking period, the pressure was released and the oil production was measured (production step). The above cycle was repeated until no more oil was produced. The results obtained showed that CO2 huff-and-puff process improves the oil production from fractured media, significantly. These results also indicate that the oil recovery is higher for huff-and-puff experiments conducted at higher pressures.
Publication Year: 2007
Publication Date: 2007-11-11
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 25
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