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Effects of pore structure on surfactant/polymer flooding-based enhanced oil recovery in conglomerate reservoirs
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LIU Zheyu,LI Yiqiang,LENG Runxi,LIU Zhenping,CHEN Xin,HEJAZI Hossein
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Table 4 Oil displacement results of the three core plugs with different pore structures.
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| Core | Initial oil saturation/% | Periodic oil
recovery/% | Ultimate oil recovery/% | | Water flooding | SP flooding | Calculation from signal amplitude | Measurement with test tube | | Unimodal | 71.8 | 39.7 | 21.8 | 61.5 | 63.8 | | Bimodal | 67.6 | 28.4 | 26.9 | 55.3 | 57.2 | | Multimodal | 65.4 | 28.0 | 25.8 | 53.8 | 55.8 |
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