Relative permeability regulation mechanisms of nano-microemulsion in tight oil and gas reservoirs

被引：0

作者：

Qi N. ^{[1
]}

Li Z. ^{[1
]}

Zhai H. ^{[1
]}

Liang C. ^{[2
]}

Li Y. ^{[1
]}

Wang Y. ^{[1
]}

Pan L. ^{[1
]}

机构：

[1] School of Petroleum Engineering in China University of Petroleum (East China), Qingdao

[2] Langfang Branch of Research Institute of Petroleum Exploration and Development, PetroChina, Langfang

来源：

Zhongguo Shiyou Daxue Xuebao (Ziran Kexue Ban)/Journal of China University of Petroleum (Edition of Natural Science) | 2020年 / 44卷 / 01期

关键词：

Adjustment mechanism; Nano-SiO[!sub]2[!/sub; O/W nano-emulsion; Relative permeability; Structural characterization;

D O I：

10.3969/j.issn.1673-5005.2020.01.010

中图分类号：

学科分类号：

摘要：

Application of relative permeability modifiers in tight oil reservoirs can effectively mobilize oil in rock matrix and improve the flow behavior of oil and water. Nano-fluid can be used to improve the oil and water relative permeability due to its large surface area, volume, quantum size effect. In this paper, nano-scale relative permeability modifiers formulated with diesel oil and dispersed nano-SiO2 particles were prepared, and their structure and properties were characterized and evaluated. The experimental results show that the nano-scale percolation agent can be stable for 3 months, which is of an O/W type nano-microemulsion with a particle size of 4.351 nm. The median particle size of different mass fraction relative permeability modifiers ranges from 3 to 7 nm. The interfacial tension of oil and water is between 0.5-5 mN/m, and the average contact angle on carbonate rock tablets is between 40° and 75°. SEM testing shows that the rock surface treated by the nano-scale relative permeability modifiers became uniform and smooth, and it can be coated by nano-adsorbent films. The decrease of oil relative permeability in carbonate core is below 20%, but the decrease of water relative permeability is over 60% after the treatment by the nano-scale relative permeability modifiers. © 2020, Periodical Office of China University of Petroleum. All right reserved.

引用

页码：89 / 95

页数：6

共 16 条

[1] Liu X., The experimental research on relative permeability modifier in displacement efficiency, (2010)
[2] Milad J.S., Kilian N.A., Atul Y., An innovative approach for RPM gel water shut-off simulation, (2016)
[3] Al-Taq A.A., Nasr-El-Din H.A., Mohammad M.S., Et al., Potential damage due to relative permeability modifiers: laboratory studies and a case history, (2008)
[4] Guo P., Zhang Y., Liu Y., Progress of research and application for relative permeability modifiers in oilfield, Chinese Journal of Colloid and Polymer, 29, 1, pp. 46-48, (2011)
[5] El-Diasty A.I., Aly A.M., Understanding the mechanism of nanoparticles applications in enhanced oil recovery, (2015)
[6] Ogolo N.A., Olafuyi O.A., Onyekonwu M.O., Enhanced oil recovery using nanoparticles, (2012)
[7] Josseph-Igbor B., Orodu O.D., Evaluating the oil mobilization properties of nanoparticles treated with Arabic gum and Xanthan gum for trapped oil in porous media, (2016)
[8] Li S., Torseter O., Experimental investigation of the influence of nanoparticles adsorption and transport on wettability alteration for oil wet berea sandstone, (2015)
[9] Li S.D., Hendraningrat L., Torsater O., Improved oil recovery by hydrophilic silica nanoparticles suspension: 2-phase flow experimental studies, (2013)
[10] Ding A.L., Goedel W.A., Experimental investigation of particle-assisted wetting, Journal of American Chemical Society (Commulication), 128, pp. 4930-4931, (2006)

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