CemCADE
Operator
: KOC
Well
: SA-573
Contract
: 12050934
Field
: Sabriyah
Prepared for
: Drilling & WO Team III
Location
: SP-185
Proposal No.
: Ver 2
i-District
: 2100134
Date Prepared
: Feb-2015
Business Phone
: 97206967
FAX No.
: 23984325
Prepared by
: Gustavo Nakagawa
Phone
: 97206967
E-Mail Address
: [email protected]
Reviewed by
: Yusrizal Yusuf
Approved by
: Chelsea Ellis
*
Disclaimer Notice:
Schlumberger submits this document with the benefit of its judgment, experience, and good oilfield practices.
This information is provided in accordance with generally accepted industry practice, relying on facts or information provided by others, limitations, computer models, measurements, assumptions and inferences that are not infallible. Calculations are estimates based on provided information. All proposals, recommendations, or predictions are opinions only.
NO WARRANTY IS GIVEN CONCERNING ACCURACY OR COMPLETENESS OF DATA, INFORMATION PRESENTED, EFFECTIVENESS OF MATERIAL, PRODUCTS OR SUPPLIES, RECOMMENDATIONS MADE, OR RESULTS OF THE SERVICES RENDERED.
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JOB OBJECTIVE
To cement 18 5/8’’ casing to surface using 15.8 ppg Class G cement slurry.
JOB PROCEDURE
1. Flush the line with 10 bbl of water and pressure test the line to 2000 psi:
2. Pump 40 bbl of water spacer ahead of cement at 4-5 bpm
3. Mix and Pump 364 bbl of 15.8 ppg Class G (+/- 0.2 ppg) at 5-6 bpm or until get pure cement slurry to
surface.
4. Displace with 21.7 bbl of 9.5 ppg WBM (fluid in hole):
- 16.7 bbl @ 4-5 bpm
- 5.0 bbl @ 1-2 bpm
After sting out, it is recommended to flush string with 10 bbl of mud to clear the string
The Max dynamic pump pressure is 600 psi assuming no flow restrictions and cement to surface (see the
graph of the Pumping Pressure)
MAXIMUM STOPPING TIME DURING THE JOB IS 20 MINUTES
Plan for a Top Job with 15.8 ppg class G cement + 1% BWOC of S001 if cement not received to surface or
cement level drops.
Total Cement slurry volume available on location for the main job is 364 bbl.
Total cement slurry available for a top job is 100 bbl.
Note:
Chain down the casing for min 5 tons to avoid casing pumpout
The calculation is based upon: 9.5 ppg mud is placed in the annulus between the Drill pipe and the 18 5/8”
casing.
The volume is based on the 22” hole plus 100% excess.
Mud conditioning is highly recommended prior to the cement job.
Mixed fluid and cement samples should to be taken
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Section 1: well description
Configuration
: Stab In
Stage
: Single
Rig Type
: Land
Total MD
: 1260.0 ft
BHST
: 94 degF
Bit Size
: 22 in
0
5
0
0
.0
1
0
0
0
.0
1
5
0
0
.0
ft
Well
OD 30. in @ 73ft OD 18.6 in @ 560ft OD 5. in @ 1220ft OD 18.6 in @ 1200ft Stb C @ 1220ft OD 18.6 in @ 1260ftLithology
Kuwait Sands
0
1
2
(x 1000) psi
Formation Press.
Frac PoreS
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Previous String
MD
(ft)
OD
(in)
Weight
(lb/ft)
ID
(in)
73.0
30
309.7
29.000
Drill Pipe
MD
(ft)
OD
(in)
Weight
(lb/ft)
(in)
ID
Grade
Collapse
(psi)
Burst
(psi)
1220.0
5
19.5
4.276
X-95
12030
12040
Stab In Collar MD : 1220.0 ft
Casing/liner Shoe MD
: 1260.0 ft
Casing/Liner
MD
(ft)
OD
(in)
Joint
(ft)
Weight
(lb/ft)
ID
(in)
Grade
Collapse
(psi)
Burst
(psi)
Thread
560.0
18 5/8
40.0
87.5
17.755
K-55
630
2250
BTC
1200.0
18 5/8
40.0
112.0
17.467
K-55
1420
2990
BTC
1260.0
18 5/8
30.0
112.0
17.467
K-55
1420
2990
BTC
Mean OH Diameter
: 22.000 in
Mean Annular Excess
: 100.0 %
Mean OH Equivalent Diameter
: 24.922 in
Total OH Volume
: 716.2 bbl (including excess)
Caliper and Hole Size Data
MD
(ft)
Caliper
(in)
Excess
(%)
Equiv. Diam.
(in)
1260.0
22.000
100.0
24.922
Max. Deviation Angle
: 1 deg
Max. DLS
: 0.075 deg/100ft
Directional Survey Data
MD
(ft)
TVD
(ft)
Deviation
(deg)
Azimuth
(deg)
Dogleg Sev.
(deg/100ft)
0.0
0.0
0.0
0.0
0.000
1260.0
1259.9
0.9
8.9
0.075
Formation Data
MD
(ft)
Frac.
(lb/gal)
Pore
(lb/gal)
Name
Lithology
1230.0
17.00
8.33
Kuwait Sands
Sandstone
1260.0
17.00
8.33
Dammam
Dolostone
Geothermal Temperature Profile
MD
(ft)
TVD
(ft)
Temperature
(degF)
Gradient
(degF/100ft)
0.0
0.0
80
0.0
1333.0
1332.9
95
1.2
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Section 2: fluid sequence
Original fluid
WBM
9.50 lb/gal
P
v: 45.000 cP
T
y: 20.00 lbf/100ft2
Displacement Volume
21.7 bbl
Drill Pipe Volume
21.7 bbl
Total Volume
425.7 bbl
TOC
0.0 ft
Fluid Sequence
Name
Volume
(bbl)
Ann. Len
(ft)
Top
(ft)
Density
(lb/gal)
Rheology
Water
40.0
0.0
8.34
viscosity:1.000 cP
Cement Slurry
364.0
1260.0
15.80
P
v:39.089 cP
T
y:30.54 lbf/100ft2
WBM
21.7
0.0
9.50
P
v:45.000 cP
T
y:20.00 lbf/100ft2
WARNING : CASING PUMP OUT
Static Security Checks :
Frac
5 psi
at 73.0 ft
Pore
28 psi
at 73.0 ft
Collapse
434 psi
at 560.0 ft
Burst
2250 psi
at 0.0 ft
Csg.Pump out
-20.5 lb
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Section 3: pumping schedule
Pumping Schedule
Name
Flow Rate
(bbl/min)
Volume
(bbl)
Stage Time
(min)
Cum.Vol
(bbl).
Inj. Temp.
(degF)
Comments
Water
5.0
40.0
8.0
40.0
80 Pump water as a spacer
Cement Slurry
5.5
364.0
66.2
364.0
80 Mix and pump cement slurry
WBM
4.0
16.7
4.2
16.7
80 Displace with WBM
WBM
3.0
5.0
1.7
21.7
80 Displace with WBM
Total
01:20 hr:mn 425.7 bbl
Dynamic Security Checks :
Frac
4 psi
at 73.0 ft
Pore
0 psi
at 73.0 ft
Collapse
424 psi
at 560.0 ft
Burst
2241 psi
at 235.4 ft
Temperature Results
BHCT
82 degF
Simulated Max HCT
81 degF
Simulated BHCT
80 degF
Max HCT Depth
180.0 ft
CT at TOC
81 degF
Max HCT Time
01:20:00 hr:mn:sc
Static temperatures :
At Time
(hr:mn)
(hr:mn)
Geo. Temp.
Top of Cement
(degF)
(degF)
80 degF
Bottom Hole
(degF)
(degF)
94 degF
Minimum TT Requirement
Name
Flow Rate
Volume
Cement Slurry
(bbl/min)
(bbl)
(min)
Water
5
40
12
Cement Slurry
5.5
364
66.2
WBM
5
16.7
3.3
WBM
2
5
2.5
Safety Margin
120
Minimum TT Requirement
204.0
3:24 hr:mn
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Surface Pressure
0
40
80
120
160
200
240
280
320
360
400
440
Pumped Volume (bbl)
600
500
400
300
200
100
0
Su
rf
.
Pre
s
s
.
(p
s
i)
Acquired Pressure Calc. Pump Press. Calc. CemHPEstimated ECD
0
40
80
120
160
200
240
280
320
360
400
440
Pumped Volume (bbl)
18
15
12
9
An
n
.
Pre
s
s
u
re
(l
b
/g
a
l)
Hydrostatic DynamicDepth = 1260 ft
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Section 4: centralizer placement
Top of centralization
:0.0 ft
Bottom Cent. MD
:1245.0 ft
Casing Shoe
:1260.0 ft
NB of Cent. Used
:12
Centralizer Placement
Bottom MD
(ft)
Nbr.
Cent. /
Joint
Cent. Name
Code
Min. STO
(%)
@ Depth
(ft)
1200.0
10
1/3
NW-ST-18 5/8-12-ST A4
W18E
97.2
160.0
1260.0
2
1/1
NW-ST-18 5/8-12-ST A4
W18E
99.0
1260.0
Centralizer Description
Centralizer Tests
Cent. Name
Code
Casing
OD
(in)
Max. OD
(in)
Min. OD
(in)
Rigid
Origin
Hole Size
(in)
Running
Force
(lbf)
Restoring
Force
(lbf)
NW-ST-18 5/8-12-ST A4
W18E
18 5/8
25.197
20.000
No
Hannover
24.000
357.45
2812.36
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Laboratory Cement Test Report
15.8 ppg 18 5-8 in Csg
Confirmation Test
Signatures
Fluid No : AKC 17583001
Client
: K O C
Location / Rig
: SP-185
Date
: Feb-12-2015
Well Name
: SA-573
Field
: Sabriyah
Gio-AEC
Job Type
18 5-8 in Csg
Depth
1260.0 ft
TVD
1260.0 ft
BHST
95 degF
BHCT
85 degF
BHP
1060 psi
Starting Temp.
80 degF
Time to Temp.
00:14 hr:mn
Heating Rate
0.36 degF/min
Starting Pressure
263 psi
Time to Pressure
00:14 hr:mn
Schedule
9.2-3
Composition
Slurry Density
15.80 lb/gal
Yield
1.16 ft3/sk
Mix Fluid
5.146 gal/sk
Solid Vol. Fraction
40.60 %
Porosity
59.4 %
Slurry type
Conventional
Code
Concentration
Sack Reference
Component
Blend Density
Lot Number
UCN G
94 lb of CEMENT
Blend
3.200 SG
Silo # 9
Loc Water
5.136 gal/sk
Base Fluid
D047
0.010 gal/sk
Antifoam
07052013-2
Rheology
Temperature
80 degF
85 degF
(rpm)
(deg)
Up
Down
(deg)
Average
(deg)
(deg)
Up
Down
(deg)
Average
(deg)
300
57.0
57.0
57.0
68.0
68.0
68.0
200
46.0
48.0
47.0
56.0
58.0
57.0
100
35.0
36.0
35.5
46.0
48.0
47.0
60
28.0
30.0
29.0
37.0
39.0
38.0
30
23.0
25.0
24.0
32.0
34.0
33.0
6
16.0
17.0
16.5
20.0
22.0
21.0
3
14.0
15.0
14.5
17.0
18.0
17.5
10 sec Gel
17 deg - 18.14 lbf/100ft2
18 deg - 19.21 lbf/100ft2
10 min Gel
29 deg - 30.95 lbf/100ft2
30 deg - 32.02 lbf/100ft2
1 min Stirring
25 deg - 26.68 lbf/100ft2
25 deg - 26.68 lbf/100ft2
Rheo. computed
Viscosity
: 36.708 cP Yield Point
: 21.81 lbf/100ft2
Viscosity
: 39.089 cP Yield Point
: 30.54 lbf/100ft2
Thickening Time
Consistency
Time
Remark :
FLY MIX
40 Bc
03:55 hr:mn
70 Bc
04:32 hr:mn
Water Analysis
Chloride
Calcium
Magnesium
3936.00 mg/l
(lb/bbl)
(lb/bbl)
Comments
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Laboratory Cement Test Report
18 5-8 in Top Job
Pilot Test
Signatures
Fluid No : AKC 17301001
Client
: K O C
Location / Rig
: SP-185
Date
: Oct-02-2014
Well Name
: SA-573
Field
: Sabriyah
Gio-AO-AEC
Job Type
18 5-8 in Csg
Depth
1260.0 ft
TVD
1260.0 ft
BHST
95 degF
BHCT
85 degF
BHP
1060 psi
Starting Temp.
90 degF
Time to Temp.
00:14 hr:mn
Heating Rate
0.00 degF/min
Starting Pressure
263 psi
Time to Pressure
00:14 hr:mn
Schedule
9.2-3
Composition
Slurry Density
15.80 lb/gal
Yield
1.17 ft3/sk
Mix Fluid
5.204 gal/sk
Solid Vol. Fraction
41.00 %
Porosity
59.0 %
Slurry type
Conventional
Code
Concentration
Sack Reference
Component
Blend Density
Lot Number
UCN G
94 lb of CEMENT
Blend
3.200 SG
Silo # 3
loc water
5.133 gal/sk
Base Fluid
D047
0.010 gal/sk
Antifoam
07052013-2
S001
1.000 %BWOC
Accelerator
Oc 2014
Rheology
Temperature
90 degF
90 degF
(rpm)
(deg)
Up
Down
(deg)
Average
(deg)
(deg)
Up
Down
(deg)
Average
(deg)
300
58.0
58.0
58.0
74.0
74.0
74.0
200
49.0
49.0
49.0
64.0
64.0
64.0
100
38.0
38.0
38.0
51.0
51.0
51.0
60
31.0
33.0
32.0
44.0
44.0
44.0
30
25.0
27.0
26.0
36.0
38.0
37.0
6
17.0
19.0
18.0
20.0
22.0
21.0
3
15.0
17.0
16.0
15.0
17.0
16.0
10 sec Gel
16 deg - 17.08 lbf/100ft2
17 deg - 18.14 lbf/100ft2
10 min Gel
26 deg - 27.75 lbf/100ft2
24 deg - 25.62 lbf/100ft2
1 min Stirring
24 deg - 25.62 lbf/100ft2
15 deg - 16.01 lbf/100ft2
Rheo. computed
Viscosity
: 35.427 cP Yield Point
: 24.38 lbf/100ft2
Viscosity
: 40.262 cP Yield Point
: 35.57 lbf/100ft2
Thickening Time
Consistency
Time
Remark :
FLY MIX
40 Bc
02:16 hr:mn
70 Bc
02:56 hr:mn
Water Analysis
Chloride
Calcium
Magnesium
3936.00 mg/l
(lb/bbl)
(lb/bbl)
Comments
General Comment : Pilot Test
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Possible HSE Situations
Injury Emergency
Environmental Spill Burm off affected area, keep people away, put absorbing material on spill, Inform DS and Schlumberger Personnel who is taking calls, clean up and dispose of spill properly if safe to do so
Possible SQ Execution Situations Contingency Plan
Loss of Pump Evaluate the situation, if you can by-pass pump, without jeopardizing job quality, continue pumping, if job quality will be effected inform Company Man of situation, and continue with job if he is satisfied with new job parameters
Cement Head Problems Evaluate the situation. Leak - tighten or replace affected part, if less then 15 minutes down time. Valve or pin not
working remove head, and install swedge if hydrostatics allow, otherwise continue at reduce rate
"Down" time limit before circulating If cement thickening time allows it. And Company Man agrees shut down for max 30 minutes. If slurry mixed is equal to
cement out well requirements plus 10% and Company Man agrees start to displace if problem cannot be fixed in 30 minutes
Bulk Delivery Problems Evaluate the situation, Slow down mixing as much as possible, fix the problem, and if delivery can keep up to
reduce rate, and the cement thickening time will allow you to place the slurry, then continue
Density/Rate variation limits (time, Evaluate the situation, If density is more then 2% different from planned then repair problem, This may mean you density points,rate) before shutting have to slow down for awhile for the system to smooth out, then when situation is under control continue mixing down to regroup or fix) You may have to shut down and clean jetting bowl, cement delivery, water delivery ?
Maximum allowable pumping pressure in order to avoid burst, collapse press. Or pumping out
casing Never exceed 75% of your collapse pressure of the weakest tubular you are pumping through and calculate lift press. Loss of triplex pump Continue with other pump as long as you can place slurry 30 minutes before its thickening time, Inform Company Man Burst 4" Suction & Discharge hoses Have at least 2 hoses of longer length then any of the hoses you are using always available and ready to install Excessive engine overheating Evaluate the situation, If less the 220 spray small water continuously onto radiator, more then 220 shut it down Excessive foam generation Add more defoamer, Check that all oilers Are topped up, check slurry density with mud balance, it might be light Mixing water delivery problem Evaluate situation, slow delivery rate, check inline screens for being plugged, shut down no more then 30 minutes Batch mixer tank problems (Agitating,
C-Pump failure, Butterfly valve
efficiency,…. Etc.) Evaluate situation, by-pass problem if possible, slow down and fix problem, if it can be done in less then 30 min. High viscous slurry encountered Temporally add more mix fluid, check with mud balance, make sure you are using proper mix fluid, and cement
Evaluate situation,
Decision Points on dropping plug If cement thickening time allows it. And Company Man agrees shut down for max 30 minutes. If slurry mixed is equal to vs circulating cement out well requirements plus 10% and Company Man agrees start to displace if problem can ot be fixed in 30 minutes Standby Equipment Have all standby equipment check out, and rigged up, ready and running to take over if need be
Leaks Evaluate situation, but generally shut down close in well, bleed off , and check union seal and tighten and continue
Other Possible Situations Contingency Plan
How much to "over displace" if No more then 1/2 your shoe track. Perform mud density check using press mud balance to check mud aeration top plug does not "bump" on time mud check = fill mud balance take weight, then pressurize balance, take weight then divide = airation possible 2% What to do if pressure limit reached Slow down pump rate, if possible work casing, bleed off slowly, record fluid, start pumping again never exceed
your pressure limit, unless Company Man, and Manager talk about it and Company Man signs release form Blowout Evaluate situation, and response accordingly, but generally activate emergency shut down devices, and move away
from well going against the wind, and meet at muster point (Continue pumping if you are killing well)
Loss of Returns
Slow down pump rate, Hesitate Pumping, if possible work casing, to see if you can break bridging problem in well,
