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Dual drag reduction mechanisms of water-based dispersion with nanoparticle is proposed. A contrastive study is take to verify the mechanism, in which the changes of surface microstructure and wettabilities of the core slices take place before and after treating by dispersion with hydrophobic nanoparticles and scouring by water. The results show that the surface of core slice which is treated by water-based dispersion with hydrophobic nanoparticles has strong hydrophilic property, and a compact nanoparticle adsorption layer forms on it. The nanoparticle adsorption layer still exists after scouring, but the core slice surface is changed into strong/super hydrophobic, reflecting that the surfactants which are adsorbed on the nanoparticles adsorption layer surface are gradually cleaned. The water-based dispersion with hydrophobic nanoparticles are mainly manifested as the chemical surfactant drag reduction effect during initial injection. With the injection continued, the mechanical drag reduction induced by the slip effect of super hydrophobic surface is reflected mainly. Core displacement results show that the water-phase effective permeability could increase about 84.3% on average. The results strongly confirm the dual drag reduction mechanism of the water-based dispersion with hydrophobic nanoparticles.
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Keywords:
- hydrophobic nanoparticles /
- dispersion /
- dual drag reduction mechanism /
- core microchannel
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[26] Wang X L, Di Q F, Zhang R L, Gu C Y, Wang Z H 2010 Petroleum Drilling Techniques 38 10 (in Chinese) [王新亮, 狄勤丰, 张任良, 顾春元, 王掌洪 2010 石油钻探技术 38 10]
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[1] Barthlott W, Neinhuis C 1997 Planta. 202 1
[2] Choi C, Ulmanella U, Kim J, Ho C, Kim C 2006 Phys. Fluids 18 087105
[3] Choi C H, Westin K J A, Breuer K S 2003 Phys. Fluids 15 2897
[4] Cottin B, Barrat C J L, Bocquet L, Charlaix E 2003 Nat. Mater. 2 237
[5] Gogte S, Vorobieff P, Truesdell R, Mammoli A, van Swol F, Shah P, Brinker C J 2005 Phys. Fluids 17 051701
[6] Ou J, Perot B, Rothstein J P 2004 Phys. Fluids 16 4635
[7] Truesdell R, Mammoli A, Vorobieff P, van Swol F, Brinker C J 2006 Phys. Rev. Lett. 97 44504
[8] Gu C Y, Di Q F, Fang H P 2007 J. Hydrodyn. 19 365
[9] Di Q F, Gu C Y, Shi L Y, Fang H P 2007 Dril. Produc. Technol. 30 91 (in Chinese) [狄勤丰, 顾春元, 施利毅, 方海平 2007 钻采工艺 30 91]
[10] Di Q F, Shen C, Wang Z H, Gu C Y, Shi L Y, Fang H P 2009 Acta Petrolei Sinica 30 125 (in Chinese) [狄勤丰, 沈琛, 王掌洪, 顾春元, 施利毅, 方海平 2009 石油学报 30 125]
[11] Gu C Y, Di Q F, Shi L Y, Wu F, Wang W C, Yu Z B 2008 Acta Phys. Sin. 57 3071 (in Chinese) [顾春元, 狄勤丰, 施利毅, 吴非, 王文昌, 余祖斌 2008 57 3071]
[12] Zhang R L, Di Q F, Wang X L, Gu C Y 2010 J. Hydrodyn. 22 366
[13] Zhang R L, Di Q F, Wang X L, Gu C Y 2011 Chin. J. Comput. Phys. 28 225 (in Chinese) [张任良, 狄勤丰, 王新亮, 顾春元 2011 计算物理 28 225]
[14] Wang X L, Di Q F, Zhang R L, Gu C Y 2010 Adva. Mech. 40 241 (in Chinese) [王新亮, 狄勤丰, 张任良, 顾春元 2010 力学进展 40 241]
[15] Gu C Y, Di Q F, Shen C, Wang Z H, Shi L Y, Wang X L 2011 Petroleum Exploration and Development 38 84 (in Chinese) [顾春元, 狄勤丰, 沈琛, 王掌洪, 施利毅, 王新亮 2011 石油勘探与开发 38 84]
[16] Wang S R, Li X G, Liu D Z 2010 Surfactant Chemistry (Beijing: Chemical Industry Press) p41 (in Chinese) [王世荣, 李祥高, 刘东志 2010 表面活性剂化学 (北京:化学工业出版社) 第41页]
[17] Li F C, Kawaguchi Y, Yu B, Wei J J, Hishida K 2008 International Journal of Heat and Mass Transfer 51 835
[18] Zhang H X, Wang D Z, Chen H P 2009 Arch. Appl. Mech. 79 773
[19] Voronov R S, Papavassiliou D V 2008 Ind. Eng. Chem. Res. 47 2455
[20] Rothstein J P 2010 Ann. Rev. Fluid Mech. 42 89
[21] Huang D M, Sendner C, Horinek D 2008 Phys. Rev. Lett. 101 226101
[22] Gao P, Geng X G, Ou X L, Xue W H 2009 Acta Phys. Sin. 58 421 (in Chinese) [高鹏, 耿兴国, 欧修龙, 薛文辉 2009 58 421]
[23] Gong M G, Xu X L, Yang Z 2010 Chin. Phys. B 19 056701
[24] Yang Z, Xu X L, Gong M G 2010 Chin. Phys. B 19 126103
[25] Li D, Di Q F, Li J Y, Qian Y H, Fang H P 2007 Chin. Phys. Lett. 24 1021
[26] Wang X L, Di Q F, Zhang R L, Gu C Y, Wang Z H 2010 Petroleum Drilling Techniques 38 10 (in Chinese) [王新亮, 狄勤丰, 张任良, 顾春元, 王掌洪 2010 石油钻探技术 38 10]
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