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Enhanced oil recovery mechanisms of polymer flooding in a heterogeneous oil reservoir
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LU Xiangguo,CAO Bao,XIE Kun,CAO Weijia,LIU Yigang,ZHANG Yunbao,WANG Xiaoyan,ZHANG Jie
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Table 2 Experimental schemes and flooding pressure data for different types of polymer solutions.
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| Scheme No. | Polymer type | Polymer concentration/(mg?L-1) | Viscosity/
(mPa?s) | Pressure difference of
polymer flooding/MPa | Pressure difference of
waterflooding/MPa | | First half of core | Second half of Core | First half
of core | Second half
of core | | 2-1 | APP4 | 1750 | 351.3 | 0.194 | 0.007 | 0.043 | 0.002 | | 2-2 | CAB20 | 1750 | 289.5 | 0.147 | 0.012 | 0.026 | 0.004 | | 2-3 | HTPW | 1750 | 78.0 | 0.074 | 0.018 | 0.017 | 0.007 |
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