Reservoir Engineering - Nanotechnology - Lecture Slides, Slides of Nanotechnology

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Group U2:

Kyle Demel

Keaton Hamm

Bryan Holekamp

Rachel Houk

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 Introduction

 Research Article ◦ Background ◦ Experiment ◦ Applications ◦ Summary

 Further Applications

 Additional Research http://hotfile.files.wordpress.com/2008/08/oil-rig2.jpg

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• Ability of liquid to maintain contact with a surface
• Adhesive forces determine contact angle http:// en.wikipedia.org/wiki/File:Contact_angle_schematic.png

 “Experimental study and mathematical model of

nanoparticle transport in porous media”

◦ Binshan Ju, Tailiang Fan

-The following information and graphics are from the listed article unless cited otherwise.

 Two classes by wettability

 LHPN-lipophobic hydrophilic polysilicon nanoparticles

 HLPN-hydrophobic lipophilic polysilicon nanoparticles

 Particle size from 10 to 500 nm

 Mean size ~ 70 nm

 Roughly spherical

 Pore throat size from 0.5 to 5,000 nm

 Pore chambers from 5,000 to 63,000 nm

•  (A) Wetting angle much larger than π/
•  (B) Wetting angle much smaller than π/

 Sandstone cores are taken from drilling wells in H.Z.J. oil field in China

 Effective permeability is measured before and after treatment with HLPN

 Effective permeabilities increase 1.6 to 2.1 times

 Mass balance is solved for pressure differential

 Velocity is determined by Darcy’s law

 PN concentration distribution is obtained from the convection- diffusion-adsorption equation

 Calculate new values for porosity, absolute permeability, and relative permeability and iterate

 Using hydrophobic lipophilic polysilicon nanoparticles (HLPN) made the surfaces oil-wet

 Tested on sandstone

 Used as a method to maintain reservoir pressure

 Constraints on high and low flow rates ◦ Must be economical ◦ Cannot damage reservoir

Application: Water Injection

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Optimum at 1.8 PV

Application: Water Injection

 Used lipophobic hydrophilic polysilicon nanoparticles to make the reservoir water-wet

 Goal to recover more oil by using water to “push” the oil out

Application: Enhanced Oil Recovery

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Comparison of Experiment and Model

The comparison of permeability ratios between experimental and numerical results.

Summary of Article

• Analysis of method to enhance oil recovery
  • studied two-phase fluid flow
  • experimented with wetting
• Nanoparticles of 10 to 500 nm
• Pore radii of sandstone was 6 to 63,000 nm
  • from mercury injection tests
• Wettability of surface sandstone changes by adsorbing nanoparticles - LHPN - HLPN

http://www.rgs.uky.edu/odyssey/images/sandstone.jpg