Enhanced oil recovery mechanism of low oxygen air injection in high water cut reservoir
Tóm tắt
Whether air injection can extract additional oil in high water cut reservoirs is a big question. In this paper, long-core displacement experiment has been carried out to investigate the potential of low oxygen air flooding in high water cut reservoirs. Results indicate that implementing low oxygen air injection has potential to improve oil recovery in high water cut light oil reservoir. The reservoir with higher matrix permeability and or lower reservoir permeability contrast ratio is desirable to achieve higher oil recovery factor. In addition, the oil recovery factor for water/gas alternate injection (WAG) strategy is higher than that of continuous low oxygen air flooding. And the WAG strategy has the ability to delay gas breakthrough compared with the strategy of continuous low oxygen air injection under same experiment condition.
Tài liệu tham khảo
Akkutlu IY, Yortsos YC (2005) The effect of heterogeneity on in-situ combustion: propagation of combustion fronts in layered porous media. In: SPE 75128 paper presented at the SPE/DOE symposium on improved oil recovery, Tulsa, Oklahoma, 13–17 April
Awoleke OG (2007) An experimental investigation of in-situ combustion in heterogonous media, In: M.Sc. Thesis, Stanford University, Stanford
Jia H, Sheng JJ (2016) Numerical modeling on air injection in a light oil reservoir: recovery mechanism and scheme optimization. Fuel 172:70–80
Jia H, Ni J, Pu W, Yue P, Jiang H, Yang J (2014) New view on the oxidation mechanisms of crude oil through combined thermal analysis methods. J Therm Anal Calorim 118:1707–1714
Montes AR, Gutierrez D, Moore RG et al (2010) Is high-pressure air injection (HPAI) simply a flue-gas flood? J Can Pet Technol 49(2):56–63
Zhao JZ, Hu J, Pu WF, Wang LL, Peng H (2012) Sensitivity studies on the oxidation behavior of crude oil in porous media. Energy Fuels 26(11):6815–6823