日韩av大片在线观看欧美成人不卡|午夜先锋看片|中国女人18毛片水多|免费xx高潮喷水|国产大片美女av|丰满老熟妇好大bbbbbbbbbbb|人妻上司四区|japanese人妻少妇乱中文|少妇做爰喷水高潮受不了|美女人妻被颜射的视频,亚洲国产精品久久艾草一,俄罗斯6一一11萝裸体自慰,午夜三级理论在线观看无码

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.