observations of microdrop decan and oil on mica surface by afm and vsi. ueda, a. 1, kunieda, m. 1,...
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![Page 1: Observations of Microdrop Decan and Oil on Mica Surface by AFM and VSI. Ueda, A. 1, Kunieda, M. 1, Fukunaka, Y. 1, Liang, Y. 1, Matsuoka, T. 1 and Okatsu,](https://reader034.vdocuments.net/reader034/viewer/2022051517/56649cdf5503460f949a9006/html5/thumbnails/1.jpg)
Observations of Microdrop Decan and Oil on Mica Surface by AFM and VSI.
Ueda, A.1, Kunieda, M.1, Fukunaka, Y.1, Liang, Y.1, Matsuoka, T.1 and Okatsu, K.2
1 Kyoto University2 The Technology and Research Center, Oil, Gas and Metals National Corporation (JOGMEC)
![Page 2: Observations of Microdrop Decan and Oil on Mica Surface by AFM and VSI. Ueda, A. 1, Kunieda, M. 1, Fukunaka, Y. 1, Liang, Y. 1, Matsuoka, T. 1 and Okatsu,](https://reader034.vdocuments.net/reader034/viewer/2022051517/56649cdf5503460f949a9006/html5/thumbnails/2.jpg)
-Background “EOR⇔NANO”-
High recovery=EOR (Enhanced Oil Recovery)
⇒ Viscosity, Fluidity, Substitution efficiency…
micro-phenomena controls the wettability (contact angle, surface tension)
in oil-mineral-fluid
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quartzquartz carbonatecarbonate clayclay rockrock
OilOil
quartzquartz carbonatecarbonate clayclay
Sea waterSea water
quartzquartz carbonatecarbonate
Sea waterSea water ++chemicalchemical
brine
Water-oil-rock (Enhanced oil recovery)
lv
slsv
Vapor/fluid
solid
liquid Ylvslsv cos( Young’s equation )
clayclay
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Oil
Mineral
Brine
Oil
Mineral
Brine
Brine
Oil
Oil
Mineral
MD
Ab initio
Calculations Experiment
+
Contact angle(macro)
Mineral
Oil
Brine
Mica/Quartz
・Light oil・Heavy oil・Crude oil
Analyses of oil-water-mineral interface
Flow test (lab)
Flow test (Field)
Zeta potential
Experiments
Oil
Contact angle(nano)+Force
Comparison of computational and experimental results
![Page 5: Observations of Microdrop Decan and Oil on Mica Surface by AFM and VSI. Ueda, A. 1, Kunieda, M. 1, Fukunaka, Y. 1, Liang, Y. 1, Matsuoka, T. 1 and Okatsu,](https://reader034.vdocuments.net/reader034/viewer/2022051517/56649cdf5503460f949a9006/html5/thumbnails/5.jpg)
5
5
Force curve
AFMInterface equilibrium
Contact angle
Force curve
ζ potential
MD
Fluidity
LBMContact angle under low P,T
Contact angle under high P,T
VSI
ζ potential
Experiment Simulation
yes
Wettability
Salinity
electric double layerDLVO
Adhesion, cohesion
Contact angle
Contact angle
Geochemical behavior in pore and fracture
OIL-PAC
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The previous results presented in 2008 (北京)
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Contact angle vs Salinity of brine
20
30
40
50
60
70
0 10 20 30
Oil volume μ L( )
Con
tact
ang
le(○
) Distilled water
Sea water
Cruide oil Higashi-Niigata
Locality Niigata
Density(g/cm3) 0.784
API 49.0
Velosity(30℃) 1.2
![Page 8: Observations of Microdrop Decan and Oil on Mica Surface by AFM and VSI. Ueda, A. 1, Kunieda, M. 1, Fukunaka, Y. 1, Liang, Y. 1, Matsuoka, T. 1 and Okatsu,](https://reader034.vdocuments.net/reader034/viewer/2022051517/56649cdf5503460f949a9006/html5/thumbnails/8.jpg)
Observation of oil droplet on mica by AFM
(Oil diameter ;400nm)
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1
Sapphire disc
Petroleum droplet
VSI measurement
~4.2
Observation of oil droplet by VSI (Vertical Scanning Interferometry) in distilled water at 25℃ and 1 atm
9
CCD cameraPC
Laser/White light
= 532 nm
Piezo actuator
Phase shift interferometry
Thin section sample
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The results in 2009(A preliminary report)
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Macro analyses
R
h
2
Decane
H2O droplet
R
h2arctan2
θ/2 method
R = 159 μmh = 20 μm
Θ= 28.2°
C10H22
0.7g/cm3
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mica
H2O droplet
Decane
Naturally deposition for 1 hour
Cleanup mica surface with water
Make Mica cleavage
Splash by air compressor
Soak mica in Decane for 1 day
Mica preparation
Contact angle measurement
Small emulsion(~10 micro m)
Large emulsion(10 micro m~)
Decane
H2O
Ultrasonic bath
Magnetic stirrer
Sample preparation for micro droplet
dw
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Cantilever: k=0.01Pressure: 2.5nNScan rate: 0.5Hz
1μm×1μm
21
hhn
Rrms
Root mean square Roughness
Roughness; 0.75nm
⇒ smooth surface in nanoscale
Mica surface in decan (AFM)
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5μm×5μm
Rms roughness; 0.32nm
Cantilever: k=0.01Pressure: 2.5nNScan rate: 0.5Hz
H2O droplet
Water droplet in decan (AFM)
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R=2.109 micro mH=92.25 nano mContact angle
12.7 degree (θ/2 method)
Contact angle of water droplet in decan
5μm×5μm
R
h
2
θ/2 method
R
h2arctan2
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Contact angle of water droplet in decan on mica surface (f=2.5nN)
Cantilever: k=0.01Pressure: 2.5nNScan rate: 0.5Hz
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Effect of cantilever pressure on contact angle
Is it a real contact angle?
R~10 micro mh=456.6 nano mContact angle= 10.7°
F=2.5nN
Cantilever: k=0. 1Pressure: 25nNScan rate: 0.5Hz
F=25nN
×
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Contact angle of water droplet in decan on mica surface
C.Pressure(low)
C.Pressure(high)
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Error signalTopography
Effects of scanning pressure
Real surfaceApparent surface
cantilever
F=25nN
AA=15.4 micro m
(Differential calculus)
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Effects of scanning pressure
cantilever
Force curve near water droplet
ApproachRetract
Decan on mica surface In H2O droplet
Approach
Retract
*
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Correction of contact angle
Error signal⇒ contact angle correctionForce curve⇒ height correction
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RlvY
coscos
degree1.26
N1097.2 9
Y
N/m053.0lv
Contact angle vs. oil size (AFM)
Modified Young’s equation
Similar value to the observed one in macro scale
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Waterchiller
Optical bench
Peltiercooler
HEPA filter
VSI optics(RSI, MM5500)
Wind shield(metal frame)
Active stage
Air-conditionerAmbient: 22± 0.5 ℃<40 % humidity
Air
Vertical Scan Interferometry (VSI)
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= 520 nm
fluid
20x
20xreferencemirror
compensator
PZT scanning
interferogram
beam-splitter
mica substrate
lens
lens
stage unit for reference mirror
lens
Vertical Scanning Interferometer HT-HP cell and In-situ optics
x’x
0
500
1000
1500
2000
2500
3000
0 50 100 150 200
Distance (µm)
x-x’ profile
p1 p2
He
igh
t (n
m)
20µm
(22℃、40µl/min)
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CVD diamondsubstrate
Cell body(titanium)w/ heater
Sample holder(titanium)
Calcite substrateSapphire substrate(cell window)
VSI
PTFE + metal coilseal
Gold wire(spacer)
Reaction cell for high T and P (~200℃, ~20MPa)
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Width : 9.9μmHeight : 0.52μm
Contact angle = 12.0°
Water droplet in decan (VSI)
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27
hydrophilic no hydrophilic
5nm
α-Quartz
HexaneCH3(CH2)4CH3
H2O
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Thank for your attention.