Transcript Document

CHEMICAL TRACERS, INC.
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Single Well Chemical
Tracer Testing Services
Chemical Partitioning
Chemical
Partitioning of
Tracer i between
Phases
OIL
WATER
Ki=
Ci (Oil)
Ci (Water)
at Equilibrium
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Single Well Chemical Tracer Test
For
Residual Oil Saturation
Sw
Sor
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Step 1
Ester Injection
Sw
Sor
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Step 2
Ester Push
Sw
Sor
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Step 3
Shut-In (Reaction) Period
EtAc + H2O
EtOH + HAc
Sw
Sor
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Step 4
Production Period
Sw
Sor
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Step 4
Production Period
(Continued)
Sw
Sor
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Step 4
Production Period
(Continued)
Sw
Sor
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Step 4
Production Period
(Continued)
Sw
Sor
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Step 4
Production Period
(Continued)
Sw
Sor
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Single Well Chemical Tracer Test Production Profile
2000
300
Material Balance Tracer
1800
1400
200
1200
1000
150
800
600
Product
Alcohol
Tracer
400
100
Un-reacted
Ester
Tracer
50
200
00
Concentration Tracers (ppm)
Concentration Tracers (ppm)
250
1600
0
00
500
1000
1500
2000
Volume Produced (bbls)
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Single Well Chemical Tracer Test Production Profile
2000
300
Q
250
K S
ß= i or
(1-Sor)
1600
Q/(1+ß)
1400
200
Ki= Ci(oil)/Ci(water)
1200
1000
150
Sor = ß/(ß+ Ki)
800
600
Product
Alcohol
Tracer
400
100
Un-reacted
Ester
Tracer
50
200
00
Concentration Tracers (ppm)
Concentration Tracers (ppm)
1800
0
00
500
1000
1500
2000
Volume Produced (bbls)
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TYPICAL SWCT INJECTION SYSTEM
PUMP
FILTERS
MIXING POINT
STATIC
MIXER
BOOSTER
PUMP
SAMPLER
FLOW PRESSURE
METER
GUAGE
WELL
CHEMICALS
BRINE
BRINE TANKAGE
CHEMICAL
DRUMS
POSITIVE
DISPLACEMENT
CHEMICAL
PUMPS
TO GAS
CHROMATOGRAPH
FOR ANALYSIS
TYPICAL SWCT PRODUCTION SYSTEM
TO GAS
CHROMATOGRAPH
FOR ANALYSIS
GAS FLOW
LINE
SAMPLER
WELL
PORTABLE
SEPARATOR
CALIBRATED TANK
1400
350
300
Sor = Zero Case
1000
250
Un-reacted
Ester
Tracer
800
Product
Alcohol
Tracer
200
600
150
400
100
200
50
0
Concentration Tracers (ppm)
Concentration Tracers (ppm)
1200
0
0
500
1000
1500
Volume Produced (bbls)
2000
2500
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1000
250
Sor= 10%
(K= 5.0)
800
700
200
Product
Alcohol
Tracer
600
150
Un-reacted
Ester
Tracer
500
400
100
300
200
50
Concentration Tracers (ppm)
Concentration Tracers (ppm)
900
100
0
0
0
500
1000
1500
Volume Produced (bbls)
2000
2500
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1000
200
Product
Alcohol
Tracer
Concentration Tracers (ppm)
800
180
Sor= 20%
(K= 5.0)
160
700
Concentration Tracers (ppm)
900
140
Un-reacted
Ester
Tracer
600
500
120
100
400
80
300
60
200
40
100
20
0
0
0
500
1000
1500
Volume Produced (bbls)
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2500
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1000
Product
Alcohol
Tracer
800
Concentration Tracers (ppm)
160
Sor= 30%
(K= 5.0)
140
700
120
600
Un-reacted
Ester
Tracer
500
100
80
400
60
300
40
200
Concentration Tracers (ppm)
900
180
20
100
0
0
0
500
1000
1500
Volume Produced (bbls)
2000
2500
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1200
500
450
Simulation
400
Field Data
Secondary Tracer
n-propyl alcohol
350
800
300
600
250
200
Primary Tracer
n-propyl
Formate
400
150
Concentration n-Propyl Alcohol (ppm)
Concentration n-Propyl Formate (ppm)
1000
100
200
50
0
0
200
400
600
800
1000
1200
1400
1600
1800
0
2000
Volume Produced (bbls)
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400
900
Simulation
800
Secondary Tracer
Ethanol
Field Data
700
300
600
Primary Tracer
Ethyl Formate
250
500
200
400
150
300
100
Concentration Ethanol (ppm)
Concentration Ethyl Formate (ppm)
350
200
50
100
0
0
200
400
600
800
1000
1200
Volume Produced (bbls)
1400
1600
1800
0
2000
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ZONE 1
Ethyl Formate and Ethanol
2000
800
1800
700
ETHANOL
Separation
600
1400
1200
500
Ethyl Formate Field Data
Ethanol Field
Data
1000
400
800
300
600
200
CONCENTRATION ETHANOL, ppm
CONCENTRATION ETHYL FORMATE, ppm
1600
400
ETHYL FORMATE
100
200
0
0
100
200
300
400
BARRELS PRODUCED
500
600
700
0
800
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ZONE 1
Product Tracer, Ethanol
700
CONCENTRATION ETHANOL, ppm
600
Sor = 44%
Sor = 24%
500
400
Sor = 34%
Best Fit
300
200
ETHANOL
100
0
0
100
200
300
400
BARRELS PRODUCED
500
600
700
800
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ZONE 1
iso Propyl Formate and iso Propyl Alcohol
1600
250
Separation
Iso Propyl Formate
200
1200
Iso Propyl Alcohol
1000
150
800
Iso Propyl Alcohol Curves
Sor = 30%
Sor = 32%
Sor = 34%
Sor = 36%
600
100
CONCENTRATION IPA, ppm
CONCENTRATION ISO PROPYL FORMATE, ppm
1400
400
50
200
0
0
100
200
300
400
BARRELS PRODUCED
500
600
700
0
800
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Summary of Test Conditions
Variable
Interval Height
Porosity
Reservoir Temperature
Brine Salinity
TDS
Permeability
Oil Gravity
Sor (PV)
Range
8 to 104 feet
7 to 34 %
80 to 249 Deg. F.
1,200 to 270,000
ppm
4.5 to 6,000 md
12 to 49 API
7 to 45%
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Single Well IOR Evaluation
One-Spot Pilot
Local EOR
Flood
Push Water
20 Feet
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Before EOR Injection
EtOH and EtAc Tracers
Reflect Sor = 0.30
80
1200
1000
Ethanol
Solid line is Sor=0.30 case.
60
800
50
40
600
30
400
20
200
10
0
0
200
400
600
800
Barrels Produced
1000
1200
0
1400
Concentration EtAc, ppm
Concentration EtOH, ppm
70
After EOR Injectin
EtOH and EtAc Tracers
Reflect Sor = 0.05
50
2000
45
1600
35
30
1200
25
20
800
15
10
400
5
0
0
0
200
400
600
800
Barrels Produced
1000
1200
1400
Concentration EtAc, ppm
Concentration EtOH, ppm
40
IOR Processes Tested via One-Spot Pilot
• Surfactant-Polymer
• Lignin-Surfactant-Polymer
• Alkaline-Polymer
• Alkaline-Surfactant-Polymer
• Carbon Dioxide
• Miscible Hydrocarbon