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測(cè)量應(yīng)用案例-20190901

來源:美國(guó)布魯克海文儀器公司   2019年09月18日 09:52  

文獻(xiàn)名: Experimental investigation of spontaneous imbibition process of nanofluid in ultralow permeable reservoir with nuclear magnetic resonance

 

作者: Hongda Zhou, Qingsheng Zhang, Caili Dai, Yuyang Li, Wenjiao Lv, Yining Wu, Rui Cheng, Mingwei Zhao

School of Petroleum Engineering, State Key Laboratory of Heavy Oil Processing, China University of Petroleum (East China), Qingdao 266580, PR China

 

摘要:Spontaneous imbibition of nanofluid has attracted much interest in enhanced oil recovery (EOR) in ultralow permeable reservoirs. However, the oil distribution in ultralow permeable cores during the spontaneous imbibition using nanofluids has not been discussed in detail. In this study, imbibition experiment and nuclear magnetic resonance (NMR) measurement were used to monitor the migration rule of nanofluid and oil distribution in the imbibition. The results show that 70.82–71.98?wt% of the oil was distributed in mesopores (50?nm?<?pore size??3000?nm). The final oil recoveries of cores immersed in different concentrations of nanofluids (0.1?wt%, 0.05?wt%, 0.01?wt%, and 0.005?wt%) and brine were 32.5%, 26.9%, 20.5%, 15.1%, and 8.3%, respectively. The NMR spectra and imaging show that the nanoparticles seeped into the core. Significant insight into the oil distribution during the imbibition of nanofluid is provided.

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