1887

Abstract

Summary

Depletion process, or so-called cold production, in the Orinoco Heavy Oil Belt presents foamy oil behaviour, with a primary recovery factor of only 8–12%. In previous studies, a novel non-thermal process, named Foamy Oil Recreation Process (FORP), to enhance the recovery was proposed. The process includes cyclic injection of solvent, gas and surfactants in sequence, to promote the regeneration of foamy oil, in a huff-n-puff manner. This paper was a continuing experimental investigation of the impact of surfactant concentration on the process. Three types of experimental tests were conducted in the study, including test on effective formation of foamy oil, test on 2D microscopic flow, and 1D sand-pack FORP test. The test on effective formation of foamy oil showed that an increase in surfactant concentration improves the stability of foam liquid film and prolongs foam life. The 2D micro-flow experiment results illustrated that the process presents obvious foamy oil flow behaviour when the surfactant concentration exceeds 2wt%. The sand pack experiment results indicated that the FORP recovery degree decreases sharply when the surfactant concentration is less than 1.5wt%. As an experimental conclusion, surfactant concentration of 1.5wt% to 2.5wt% is recommended for FORP.

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/content/papers/10.3997/2214-4609.202310991
2023-06-05
2026-02-06

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References

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/content/papers/10.3997/2214-4609.202310991
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Impact of Surfactant Concentration on Foamy Oil Recreation Process for Extra Heavy Oil Recovery
Conference Proceedings 2023, 1 (2023); https://doi.org/10.3997/2214-4609.202310991
/content/papers/10.3997/2214-4609.202310991
/content/papers/10.3997/2214-4609.202310991
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