api dynamic settling june 11-15, 2012. project goals design four systems for cooperative testing....
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![Page 1: API Dynamic Settling June 11-15, 2012. Project Goals Design four systems for cooperative testing. System 1 Pass API Sedimentation Test Fail Dynamic Modified](https://reader036.vdocuments.us/reader036/viewer/2022081519/56649d8e5503460f94a76fea/html5/thumbnails/1.jpg)
API Dynamic Settling
June 11-15, 2012
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Project GoalsDesign four systems for cooperative testing.
•System 1•Pass API Sedimentation Test•Fail Dynamic Modified Paddle Test
•System 2•Pass API Sedimentation Test•Pass Dynamic Modified Paddle Test
•System 3•Hematite System that Fails Dynamic Modified Paddle Test
•System 4•Spacer System that Passes Dynamic Modified Paddle Test
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ParametersStandard API Test Schedule
•Depth and Temperature•Depth 10,000 feet•BHST = 250 °F, BHCT = 180 °F•BHP = 6300 psi
• API Casing Schedule•50 minutes to BHCT and BHP
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Cement Materials for System 1Cement
•LaFarge Joppa H
Sand•100 mesh Silica Sand
Weighting Agent•Hematite
Retarder/Fluid Loss•Diacel LWL
Extender•Bentonite
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Slurry Test PlanRheology
•Atmospheric Consistometer conditioning•Pressurized Consistometer conditioning
Free Water•Atmospheric Consistometer conditioning - Vertical•Pressurized Consistometer conditioning - 45°Angle
Thickening Time•Include motor shut-off
API SedimentationDynamic Modified Paddle
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System Design 1
Class H + 35% Sand + 25%Hematite + 0.5% Diacel LWL•Density 18.0 ppg•Yield 1.43 cu ft/sack•Mix fluid 5.07 gallons/sack•Solid Volume Fraction 52.8%
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System 1 - Rheology
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System 1 - Rheology
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System 1 – Free WaterAtmospheric Conditioning
20 minutes at BHCT
Trace Free WaterSlight Settling
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System 1 – Free Water 45° AnglePressurized Conditioning
50 minute Heat-Up+ 20 minutes at BHCT
BHP 6300 psi
4.5 mLs Free WaterChanneling to 225 mLs
Slight Settling
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System 1 – Thickening Time
00:00 01:00 02:00 03:00 04:00 05:00 06:00 07:00 08:00Time (hr:mn)
10
09
08
07
06
05
04
03
02
01
0C
on
sis
ten
cy (
Bc)
20
01
80
16
01
40
12
01
00
80
60
Te
mp
era
ture
(d
eg
F)
BCTemperature
Tail Slurry Consistency & Temperature vs Time
Motor Shut-Off
Test
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System 1 – API SedimentationPressurized Conditioning
+ 20 minutes at BHCT
17.50 18.00 18.50 19.00 19.50 20.000.00
10.00
20.00
30.00
40.00
50.00
60.00
70.00
80.00Density of Slurry (ppg)
Density / ppg
Sam
ple
Vo
lum
e /
cm
3
Maximum Difference = 7.8 %
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System 1 – Modified Paddle
Slurry Density = 18.1 ppg
Top Density = 17.7 ppgMiddle Density = 18.1 ppgBottom Density = 18.8 ppg
Cone Height = 1.5 inches
25 rpm
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System Design 2
Class H + 35% Sand + 25%Hematite + 1% Bentonite + 0.5% Diacel LWL
•Density 18.0 ppg•Yield 1.44 cu ft/sack•Mix fluid 5.07 gallons/sack•Solid Volume Fraction 52.9%
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System 2 - Rheology
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System 2 - Rheology
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System 2 – Free Water 45° AnglePressurized Conditioning
50 minute Heat-Up + 20 minutes at BHCT
BHP 6300 psi
4 mLs Free WaterNo Channeling
No Settling
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System 2 – Thickening Time
00:00 00:30 01:00 01:30 02:00 02:30 03:00 03:30Time (hr:mn)
10
09
08
07
06
05
04
03
02
01
00
Co
nsis
ten
cy (
Bc)
20
01
80
16
01
40
12
01
00
80
60
40
20
0T
em
pe
ratu
re (
de
gF
)
BCTemperature
Tail Slurry Consistency & Temperature vs Time
Motor Shut-Off
Test
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System 2 – API SedimentationPressurized Conditioning
+20 minutes at BHCT
18.5218.5418.5618.5818.6018.6218.6418.6618.6818.7018.720.00
10.00
20.00
30.00
40.00
50.00
60.00
70.00
80.00Density of Slurry (ppg)
Density / ppg
Sam
ple
Vo
lum
e /
cm
3Maximum Difference = 3.3 %
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System 2 – Modified Paddle
Slurry Density = 18.1 ppg
Top Density = 17.5 ppgMiddle Density = 17.8 ppgBottom Density = 19.2 ppg
Cone Height = 1 inch25 rpm
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System Design 3
Hematite System that Fails Dynamic Modified Paddle Test
Class H + 42%Hematite + 0.2% Retarder + 0.2% Antifoam
•Density 19.0 ppg•Yield 1.20 cu ft/sack•Mix fluid 4.40 gallons/sack•Solid Volume Fraction 50.8%
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System 3 - Rheology
135
72
Plastic Viscosity (cP)
Yield Point (lbf/100ft2)
117
26
Plastic Viscosity (cP)
Yield Point (lbf/100ft2)
2810 sec x 7
9
10 min x 18 18 36 x 18
14 11.5 23
18
x
36
141414
6 10 9 9.5
3 5 12
7
7 6.0
14071
Temp °F
double
24
17
300
30
80
up down avg
Atmospheric Conditioned Rheology (R1,B1,F2)
double
96
200 52 51
69 70.0
51.5
180
up down avg
82.0 164
100 32 32
60
67
48
103 79 85
11
64
19
32.0
100
97.5 195
24.0
122
33.5
55 67 61.0
38
46 54
99
50.0
20 15.5 31
17
24
17.0 34 29
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System 3 – Free Water and Settling
• 45 degree Free Fluid at 180°F• 3.2% Free Fluid
• Dynamic Modified Paddle Settling test• 1 inch of Cone Height• Top Density = 18.2 lb/gal• Middle Density = 19.2 lb/gal• Bottom Density = 19.4 lb/gal
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System Design 4
Spacer System that Passes Dynamic Modified Paddle Test
Chemplex 50 lb/bbl C63 Spacer + 276 lb/bbl Barite + 0.75 bbl Water
•Density 14.0 ppg•Solid Volume Fraction 25.3%
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System 4 – Free Water and Settling
• 45 degree Free Fluid at 180°F• 0% Free Fluid
• Dynamic Modified Paddle Settling test• No Measurable Cone Height• Top Density = 13.3 lb/gal• Middle Density = 13.9 lb/gal• Bottom Density = 14.0 lb/gal