270 ITB J. Eng. Sci., Vol. 44, No. 3, 2012, 270-286 Miscibility Development Computation in Enhanced Oil Recovery by Flare Gas Flooding  

Oleh:

Budiono, Angga P. ; Siagian, Utjok W.R. ; Samadhi, Tjokorde Walmiki

Jenis: Article from Journal - ilmiah nasional - terakreditasi DIKTI
Dalam koleksi: Journal of Engineering and Technological Sciences vol. 44 no. 03 (2012), page 270-286.
Topik: miscible gas flooding; MMP; PC-SAFT; multiple mixing cell; EOR.
Fulltext: 198-392-1-SM.pdf (245.34KB)

Isi artikel

Abstract. The use of flare gas as injection gas in miscible gas flooding enhanced oil recovery (MGF-EOR) presents a potential synergy between oil production improvement and greenhouse gases emission mitigation. This work is a preliminary evaluation of the feasibility of miscible flare gas injection based on phase behavior computations of a model oil (43%n-C 5 H 12 : 57%n-C ) and a model flare gas (91%CH 4 : 9%C 2 H ). The computations employed the multiple mixing-cell model with Peng-Robinson and PC-SAFT equations of state, and compared the minimum miscibility pressure (MMP) value in the cases of flare gas injection and CO 2 6 injection. For CO injection, both equations of state produced MMP values close to the measured value of 10.55 MPa. Flare gas injection MMP values were predicted to be 3.6-4.5 times those of CO 2 injection. This very high MMP implies high gas compression costs, and may compromise the integrity of the reservoir. Subsequent studies shall explore the gas-oil miscibility behavior of mixtures of flare gas with intermediate hydrocarbon gases and CO , in order to identify a suitable approach for rendering flare gas feasible as an injection gas in MGF-EOR.

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