\\192.168.1.14\ShareD\!nord side\NOV\F-297\F-297H1_MBTT4_02NOV2025_PRELIMINARY SUMMARY.pptx

1. SAIH RAWL-133H4

Corrosion log Analysis
Preliminary summary
G&P MENA
22/Oct/2025
© 2024 Halliburton. All rights reserved.

2.

Job objectives, toolstring, well schematic
Logging interval:
Main pass – 5.7-1327.0 mbdf
Repeat pass – 5.7-104.0 mbdf
Objective:
Evaluate the 7” liner, the
9 5/8” intermediate casing,
and the 13 3/8” surface
casing.

3.

Overall logged interval
Depth, m
Well sketch
GR
P, T
ПЛАНШЕТ ДАННЫХ ГИС ПО СКВАЖИНЕ
Medium sonde
Medium sonde
Long sonde
GR, GAPI
Pressure, kPa
Скв ажина 133H4 M6,
SaihmV
Rawl 0.0 - 1330.0 м
M20, mV
L20, mV
M 1:10000
0
140 -500
CCL, уе
1.8
15000 36
Temperature, оС
8 28
M10, mV
58 -2.5
200.0
300.0
400.0
500.0
600.0
700.0
800.0
900.0
1000.0
1100.0
1200.0
1300.0
8 80
M22, mV
22 -3.5
M14, mV
-7
100.0
110 -0.8
L30, mV
320 2
L22, mV
5.5 0
M24, mV
7 -3.5
Long sonde
185 -15
L26, mV
2 -100
110
L34, mV
42
L38, mV
100 -20
15

4.

Zoomed interval (13 3/8” casing corrosion and 9 5/8” moderate corrosion)
Depth, m
Well sketch
Medium sonde
M20, mV
M 1:1500
-0.8
90.0
110.0
120.0
130.0
140.0
150.0
160.0
13 3/8” casing
extensive corrosion
170.0
180.0
190.0
200.0
210.0
220.0
230.0
240.0
250.0
260.0
270.0
Скв ажина 133H4
8 80
-3.5
Long sonde
Saih Rawl 80.0 - 280.0
м mV
L20,
M22, mV
L30, mV
320 2
L22, mV
5.5 0
M24, mV
-3.5
100.0
Long sonde
ПЛАНШЕТ ДАННЫХ ГИС ПО СКВАЖИНЕ
185 -15
L26, mV
2 -100
110
L34, mV
42
L38, mV
100 -20
15

5.

Zoomed interval (7” liner corrosion)
Depth, m
Well sketch
Short sonde
M 1:1000
7” liner extensive
corrosion
1240.0
1250.0
1260.0
1270.0
1280.0
1290.0
7” liner moderate
corrosion
1300.0
1310.0
Medium sonde
M6, mV
8
30 55
S10, mV
0
130
M10, mV
9 -2.5
S12, mV
-3
1230.0
ПЛАНШЕТ Д АННЫХ ГИС ПО СКВАЖИНЕ
Скв ажина 133H4
S8, mVSaih Rawl 1220.0 - 1320.0 м
29
M14, mV
3 -7
8.5

6.

Preliminary summary description
Data quality and correlation
The recorded MBTT data has good quality. Correlation was done based on the Completion Status Report. All depths are in mbdf.
It should be noted that there is a severe effect of the well deviation across the interval 1274.5-1327.0 mbdf reflecting on short sonde and early time domains of
medium sonde corresponding to the first pipe. The mention effect was accounted for the 7” production liner thickness calculation
7” scab liner
The scab liner has an interval of minor corrosion at 1136.9-1175.3 mbdf up to 9%.
7” production liner
The liner has an extensive-moderate corrosion at 1217.5-1243.7 up to 28%, a moderate-minor corrosion at 1298.10-1327.0 mbdf up to 14%, and a minor
corrosion at 1267.3-1274.5 mbdf.
The liner has indications of a “through-wall” defects at 1292.5 mbdf, 1294.5 mbdf, and 1317.2 mbdf.
The 7” production liner hanger was detected at 1206.0-1210.3 mbdf.
9 5/8” intermediate casing
The casing has moderate corrosion at 165.9-218.2 mbdf up to 18% which corresponds to extensive corrosion on the 13 3/8” surface casing.
13 3/8” surface casing
The casing has extensive corrosion at 58.9-415.4 mbdf up to 60%.
The casing shoe was detected at 928.0 mbdf.

7.

Corrosion summary and metal loss calculation accuracy
Pipe
Thickness calculation
accuracy, %
Corroded interval, mbdf
Metal loss,
%
Top
Bottom
Max
Level of corrosion
Integrity status
13 3/8” casing
10
58.9
415.4
60
Extensive
Fail
9 5/8” casing
7
165.9
218.2
18
Moderate
Pass
7” scab liner
5
1136.9
1175.3
9
Minor
Pass
7” production liner
5
1217.5
1243.7
28
Extensive
Fail
7” production liner
5
1267.3
1274.5
8
Minor
Pass
7” production liner
5
1298.1
1327.0
14
Moderate
Pass
The MBTT is an electromagnetic-based corrosion tool that provides an average circumference metal loss calculation. The
accuracy of the metal loss calculation is 5% for the 1st barrier, 7% for the 2nd barrier, and 10% for the 3rd barrier.
GRADES OF METALL LOSS, %
Color
Loss, %
Grade / Integrity status
0
None
5 (7) - 10
Minor (7% for the 2nd barrier) / Pass
10 - 20
Moderate / Pass
20 - 100
Extensive / Fail

8.

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