Laboratory Study on Low Gas/Liquid Ratio Foam Flooding for Zhuangxi Heavy Oil |
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Authors: | Guicai Zhang Jijiang Ge Baodong Ding Jing Wang Na Li |
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Institution: | School of Petroleum Engineering , China University of Petroleum , Qingdao, P. R. China |
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Abstract: | Considering the high cost and injection pressure of conventional foam flooding, foam flooding with low gas/liquid ratio was proposed to enhance the heavy oil recovery. A foamer containing 0.2 wt% α -olefin sulfonate, 0.1 wt% HPAM and 0.5 wt% Na2CO3 was selected for Zhuangxi heavy oil. Then the foam stability and low gas/liquid ratio foam flooding were studied via micro model and sand pack experiments. The results indicate that the foam is much more stable in heavy oil than in diesel; in flooding tests, this foamer with gas/liquid ratio of 0.2:1 increases the oil recovery by 39.8%, which is nearly 11% higher than ASP solution in terms of the same injection volume (0.3PV) and agents. |
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Keywords: | Foaming stability low GLR foam flooding microscopic model |
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